Simone Caronni
9 years ago
parent
9f60621ce5
commit
c75c623093
@ -1,36 +0,0 @@
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From afd1d329ed117f6e4d8c46eba362b7d5c51184ac Mon Sep 17 00:00:00 2001
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From: Amandeep Singh <aman.dedman@gmail.com>
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Date: Wed, 9 Oct 2013 04:12:08 +0530
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Subject: [PATCH 1/2] Fix crash in krfb
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Krfb crashes on quit, if any client is connected
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due to a rfbClientConnectionGone call missing
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---
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libvncserver/main.c | 11 +++++++----
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1 file changed, 7 insertions(+), 4 deletions(-)
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diff --git a/libvncserver/main.c b/libvncserver/main.c
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index 4cb18ac..b8cdde1 100644
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--- a/libvncserver/main.c
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+++ b/libvncserver/main.c
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@@ -1061,10 +1061,13 @@ void rfbShutdownServer(rfbScreenInfoPtr screen,rfbBool disconnectClients) {
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if(disconnectClients) {
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rfbClientPtr cl;
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rfbClientIteratorPtr iter = rfbGetClientIterator(screen);
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- while( (cl = rfbClientIteratorNext(iter)) )
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- if (cl->sock > -1)
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- /* we don't care about maxfd here, because the server goes away */
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- rfbCloseClient(cl);
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+ while( (cl = rfbClientIteratorNext(iter)) ) {
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+ if (cl->sock > -1) {
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+ /* we don't care about maxfd here, because the server goes away */
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+ rfbCloseClient(cl);
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+ rfbClientConnectionGone(cl);
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+ }
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+ }
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rfbReleaseClientIterator(iter);
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}
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--
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1.9.3
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@ -1,30 +0,0 @@
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From 012594b970b07c212eaf48ed22333a9d37d017a4 Mon Sep 17 00:00:00 2001
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From: Amandeep Singh <aman.dedman@gmail.com>
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Date: Sat, 28 Sep 2013 17:58:13 +0530
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Subject: [PATCH 2/2] allow rfbInitSockets with non-ready states.
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This allows for reinitializations of e. g. sockets in a SHUTDOWN state.
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The only state that doesn't make sense to reinitialize are READY states.
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---
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libvncserver/sockets.c | 5 +++--
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1 file changed, 3 insertions(+), 2 deletions(-)
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diff --git a/libvncserver/sockets.c b/libvncserver/sockets.c
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index ddd8450..d2f814b 100644
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--- a/libvncserver/sockets.c
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+++ b/libvncserver/sockets.c
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@@ -122,8 +122,9 @@ rfbInitSockets(rfbScreenInfoPtr rfbScreen)
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{
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in_addr_t iface = rfbScreen->listenInterface;
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- if (rfbScreen->socketState!=RFB_SOCKET_INIT)
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- return;
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+ if (rfbScreen->socketState == RFB_SOCKET_READY) {
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+ return;
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+ }
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rfbScreen->socketState = RFB_SOCKET_READY;
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--
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1.9.3
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@ -1,42 +0,0 @@
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commit 045a044e8ae79db9244593fbce154cdf6e843273
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Author: newsoft <newsoft@MacBook-Air-de-newsoft-2.local>
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Date: Fri Aug 15 16:31:13 2014 +0200
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Fix integer overflow in MallocFrameBuffer()
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Promote integers to uint64_t to avoid integer overflow issue during
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frame buffer allocation for very large screen sizes
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diff --git a/libvncclient/vncviewer.c b/libvncclient/vncviewer.c
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index 3b16a6f..24bc6f8 100644
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--- a/libvncclient/vncviewer.c
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+++ b/libvncclient/vncviewer.c
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@@ -82,9 +82,27 @@ static char* ReadPassword(rfbClient* client) {
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#endif
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}
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static rfbBool MallocFrameBuffer(rfbClient* client) {
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+uint64_t allocSize;
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+
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if(client->frameBuffer)
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free(client->frameBuffer);
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- client->frameBuffer=malloc(client->width*client->height*client->format.bitsPerPixel/8);
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+
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+ /* SECURITY: promote 'width' into uint64_t so that the multiplication does not overflow
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+ 'width' and 'height' are 16-bit integers per RFB protocol design
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+ SIZE_MAX is the maximum value that can fit into size_t
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+ */
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+ allocSize = (uint64_t)client->width * client->height * client->format.bitsPerPixel/8;
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+
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+ if (allocSize >= SIZE_MAX) {
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+ rfbClientErr("CRITICAL: cannot allocate frameBuffer, requested size is too large\n");
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+ return FALSE;
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+ }
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+
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+ client->frameBuffer=malloc( (size_t)allocSize );
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+
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+ if (client->frameBuffer == NULL)
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+ rfbClientErr("CRITICAL: frameBuffer allocation failed, requested size too large or not enough memory?\n");
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+
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return client->frameBuffer?TRUE:FALSE;
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}
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@ -1,59 +0,0 @@
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commit 85a778c0e45e87e35ee7199f1f25020648e8b812
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Author: newsoft <newsoft@MacBook-Air-de-newsoft-2.local>
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Date: Fri Aug 15 16:41:58 2014 +0200
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Check for MallocFrameBuffer() return value
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If MallocFrameBuffer() returns FALSE, frame buffer pointer is left to
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NULL. Subsequent writes into that buffer could lead to memory
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corruption, or even arbitrary code execution.
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diff --git a/libvncclient/rfbproto.c b/libvncclient/rfbproto.c
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index b4d7156..f55c74f 100644
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--- a/libvncclient/rfbproto.c
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+++ b/libvncclient/rfbproto.c
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@@ -1829,7 +1829,8 @@ HandleRFBServerMessage(rfbClient* client)
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client->updateRect.x = client->updateRect.y = 0;
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client->updateRect.w = client->width;
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client->updateRect.h = client->height;
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- client->MallocFrameBuffer(client);
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+ if (!client->MallocFrameBuffer(client))
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+ return FALSE;
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SendFramebufferUpdateRequest(client, 0, 0, rect.r.w, rect.r.h, FALSE);
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rfbClientLog("Got new framebuffer size: %dx%d\n", rect.r.w, rect.r.h);
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continue;
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@@ -2290,7 +2291,9 @@ HandleRFBServerMessage(rfbClient* client)
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client->updateRect.x = client->updateRect.y = 0;
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client->updateRect.w = client->width;
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client->updateRect.h = client->height;
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- client->MallocFrameBuffer(client);
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+ if (!client->MallocFrameBuffer(client))
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+ return FALSE;
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+
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SendFramebufferUpdateRequest(client, 0, 0, client->width, client->height, FALSE);
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rfbClientLog("Got new framebuffer size: %dx%d\n", client->width, client->height);
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break;
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@@ -2306,7 +2309,8 @@ HandleRFBServerMessage(rfbClient* client)
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client->updateRect.x = client->updateRect.y = 0;
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client->updateRect.w = client->width;
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client->updateRect.h = client->height;
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- client->MallocFrameBuffer(client);
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+ if (!client->MallocFrameBuffer(client))
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+ return FALSE;
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SendFramebufferUpdateRequest(client, 0, 0, client->width, client->height, FALSE);
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rfbClientLog("Got new framebuffer size: %dx%d\n", client->width, client->height);
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break;
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diff --git a/libvncclient/vncviewer.c b/libvncclient/vncviewer.c
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index 24bc6f8..65b7412 100644
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--- a/libvncclient/vncviewer.c
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+++ b/libvncclient/vncviewer.c
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@@ -250,7 +250,8 @@ static rfbBool rfbInitConnection(rfbClient* client)
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client->width=client->si.framebufferWidth;
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client->height=client->si.framebufferHeight;
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- client->MallocFrameBuffer(client);
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+ if (!client->MallocFrameBuffer(client))
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+ return FALSE;
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if (!SetFormatAndEncodings(client))
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return FALSE;
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@ -1,22 +0,0 @@
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commit 6037a9074d52b1963c97cb28ea1096c7c14cbf28
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Author: Nicolas Ruff <nruff@google.com>
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Date: Mon Aug 18 15:16:16 2014 +0200
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Check malloc() return value on client->server ClientCutText message. Client can send up to 2**32-1 bytes of text, and such a large allocation is likely to fail in case of high memory pressure. This would in a server crash (write at address 0).
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diff --git a/libvncserver/rfbserver.c b/libvncserver/rfbserver.c
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index 5f3b31d..7e43fe3 100644
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--- a/libvncserver/rfbserver.c
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+++ b/libvncserver/rfbserver.c
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@@ -2461,6 +2461,11 @@ rfbProcessClientNormalMessage(rfbClientPtr cl)
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msg.cct.length = Swap32IfLE(msg.cct.length);
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str = (char *)malloc(msg.cct.length);
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+ if (str == NULL) {
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+ rfbLogPerror("rfbProcessClientNormalMessage: not enough memory");
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+ rfbCloseClient(cl);
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+ return;
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+ }
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if ((n = rfbReadExact(cl, str, msg.cct.length)) <= 0) {
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if (n != 0)
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@ -1,38 +0,0 @@
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commit 05a9bd41a8ec0a9d580a8f420f41718bdd235446
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Author: Nicolas Ruff <nruff@google.com>
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Date: Mon Aug 18 15:22:48 2014 +0200
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Do not accept a scaling factor of zero on PalmVNCSetScaleFactor and SetScale client->server messages. This would cause a division by zero and crash the server.
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diff --git a/libvncserver/rfbserver.c b/libvncserver/rfbserver.c
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index 7e43fe3..df7d74c 100644
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--- a/libvncserver/rfbserver.c
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+++ b/libvncserver/rfbserver.c
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@@ -2491,6 +2491,13 @@ rfbProcessClientNormalMessage(rfbClientPtr cl)
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rfbCloseClient(cl);
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return;
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}
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+
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+ if (msg.ssc.scale == 0) {
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+ rfbLogPerror("rfbProcessClientNormalMessage: will not accept a scale factor of zero");
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+ rfbCloseClient(cl);
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+ return;
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+ }
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+
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rfbStatRecordMessageRcvd(cl, msg.type, sz_rfbSetScaleMsg, sz_rfbSetScaleMsg);
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rfbLog("rfbSetScale(%d)\n", msg.ssc.scale);
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rfbScalingSetup(cl,cl->screen->width/msg.ssc.scale, cl->screen->height/msg.ssc.scale);
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@@ -2507,6 +2514,13 @@ rfbProcessClientNormalMessage(rfbClientPtr cl)
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rfbCloseClient(cl);
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return;
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}
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+
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+ if (msg.ssc.scale == 0) {
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+ rfbLogPerror("rfbProcessClientNormalMessage: will not accept a scale factor of zero");
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+ rfbCloseClient(cl);
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+ return;
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+ }
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+
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rfbStatRecordMessageRcvd(cl, msg.type, sz_rfbSetScaleMsg, sz_rfbSetScaleMsg);
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rfbLog("rfbSetScale(%d)\n", msg.ssc.scale);
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rfbScalingSetup(cl,cl->screen->width/msg.ssc.scale, cl->screen->height/msg.ssc.scale);
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@ -1,165 +0,0 @@
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commit 06ccdf016154fde8eccb5355613ba04c59127b2e
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Author: Nicolas Ruff <nruff@google.com>
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Date: Mon Sep 1 14:36:26 2014 +0200
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Fix multiple stack-based buffer overflows in file transfer feature
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diff --git a/libvncserver/rfbserver.c b/libvncserver/rfbserver.c
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index df7d74c..445331a 100644
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--- a/libvncserver/rfbserver.c
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+++ b/libvncserver/rfbserver.c
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@@ -1241,21 +1241,35 @@ typedef struct {
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#define RFB_FILE_ATTRIBUTE_TEMPORARY 0x100
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#define RFB_FILE_ATTRIBUTE_COMPRESSED 0x800
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-rfbBool rfbFilenameTranslate2UNIX(rfbClientPtr cl, char *path, char *unixPath)
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+rfbBool rfbFilenameTranslate2UNIX(rfbClientPtr cl, /* in */ char *path, /* out */ char *unixPath, size_t unixPathMaxLen )
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{
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int x;
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char *home=NULL;
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FILEXFER_ALLOWED_OR_CLOSE_AND_RETURN("", cl, FALSE);
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+ /*
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+ * Do not use strncpy() - truncating the file name would probably have undesirable side effects
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+ * Instead check if destination buffer is big enough
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+ */
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+
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+ if (strlen(path) >= unixPathMaxLen)
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+ return FALSE;
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+
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/* C: */
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if (path[0]=='C' && path[1]==':')
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+ {
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strcpy(unixPath, &path[2]);
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+ }
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else
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{
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home = getenv("HOME");
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if (home!=NULL)
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{
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+ /* Re-check buffer size */
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+ if ((strlen(path) + strlen(home) + 1) >= unixPathMaxLen)
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+ return FALSE;
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+
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strcpy(unixPath, home);
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strcat(unixPath,"/");
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strcat(unixPath, path);
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@@ -1293,7 +1307,8 @@ rfbBool rfbSendDirContent(rfbClientPtr cl, int length, char *buffer)
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FILEXFER_ALLOWED_OR_CLOSE_AND_RETURN("", cl, FALSE);
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/* Client thinks we are Winblows */
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- rfbFilenameTranslate2UNIX(cl, buffer, path);
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+ if (!rfbFilenameTranslate2UNIX(cl, buffer, path, sizeof(path)))
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+ return FALSE;
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if (DB) rfbLog("rfbProcessFileTransfer() rfbDirContentRequest: rfbRDirContent: \"%s\"->\"%s\"\n",buffer, path);
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@@ -1570,7 +1585,11 @@ rfbBool rfbProcessFileTransfer(rfbClientPtr cl, uint8_t contentType, uint8_t con
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/* add some space to the end of the buffer as we will be adding a timespec to it */
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if ((buffer = rfbProcessFileTransferReadBuffer(cl, length))==NULL) return FALSE;
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/* The client requests a File */
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- rfbFilenameTranslate2UNIX(cl, buffer, filename1);
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+ if (!rfbFilenameTranslate2UNIX(cl, buffer, filename1, sizeof(filename1)))
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+ {
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+ if (buffer!=NULL) free(buffer);
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+ return FALSE;
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+ }
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cl->fileTransfer.fd=open(filename1, O_RDONLY, 0744);
|
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/*
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@@ -1685,7 +1704,11 @@ rfbBool rfbProcessFileTransfer(rfbClientPtr cl, uint8_t contentType, uint8_t con
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}
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sizeHtmp = Swap32IfLE(sizeHtmp);
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- rfbFilenameTranslate2UNIX(cl, buffer, filename1);
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+ if (!rfbFilenameTranslate2UNIX(cl, buffer, filename1, sizeof(filename1)))
|
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+ {
|
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+ if (buffer!=NULL) free(buffer);
|
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+ return FALSE;
|
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+ }
|
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/* If the file exists... We can send a rfbFileChecksums back to the client before we send an rfbFileAcceptHeader */
|
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/* TODO: Delta Transfer */
|
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@@ -1814,7 +1837,12 @@ rfbBool rfbProcessFileTransfer(rfbClientPtr cl, uint8_t contentType, uint8_t con
|
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if ((buffer = rfbProcessFileTransferReadBuffer(cl, length))==NULL) return FALSE;
|
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switch (contentParam) {
|
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case rfbCDirCreate: /* Client requests the creation of a directory */
|
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- rfbFilenameTranslate2UNIX(cl, buffer, filename1);
|
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+ if (!rfbFilenameTranslate2UNIX(cl, buffer, filename1, sizeof(filename1)))
|
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+ {
|
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+ if (buffer!=NULL) free(buffer);
|
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+ return FALSE;
|
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+ }
|
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+
|
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retval = mkdir(filename1, 0755);
|
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if (DB) rfbLog("rfbProcessFileTransfer() rfbCommand: rfbCDirCreate(\"%s\"->\"%s\") %s\n", buffer, filename1, (retval==-1?"Failed":"Success"));
|
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/*
|
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@@ -1823,7 +1851,12 @@ rfbBool rfbProcessFileTransfer(rfbClientPtr cl, uint8_t contentType, uint8_t con
|
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if (buffer!=NULL) free(buffer);
|
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return retval;
|
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case rfbCFileDelete: /* Client requests the deletion of a file */
|
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- rfbFilenameTranslate2UNIX(cl, buffer, filename1);
|
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+ if (!rfbFilenameTranslate2UNIX(cl, buffer, filename1, sizeof(filename1)))
|
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+ {
|
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+ if (buffer!=NULL) free(buffer);
|
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+ return FALSE;
|
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+ }
|
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+
|
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if (stat(filename1,&statbuf)==0)
|
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{
|
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if (S_ISDIR(statbuf.st_mode))
|
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@@ -1841,8 +1874,18 @@ rfbBool rfbProcessFileTransfer(rfbClientPtr cl, uint8_t contentType, uint8_t con
|
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{
|
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/* Split into 2 filenames ('*' is a seperator) */
|
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*p = '\0';
|
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- rfbFilenameTranslate2UNIX(cl, buffer, filename1);
|
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- rfbFilenameTranslate2UNIX(cl, p+1, filename2);
|
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+ if (!rfbFilenameTranslate2UNIX(cl, buffer, filename1, sizeof(filename1)))
|
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+ {
|
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+ if (buffer!=NULL) free(buffer);
|
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+ return FALSE;
|
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+ }
|
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+
|
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+ if (!rfbFilenameTranslate2UNIX(cl, p+1, filename2, sizeof(filename2)))
|
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+ {
|
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+ if (buffer!=NULL) free(buffer);
|
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+ return FALSE;
|
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+ }
|
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+
|
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retval = rename(filename1,filename2);
|
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if (DB) rfbLog("rfbProcessFileTransfer() rfbCommand: rfbCFileRename(\"%s\"->\"%s\" -->> \"%s\"->\"%s\") %s\n", buffer, filename1, p+1, filename2, (retval==-1?"Failed":"Success"));
|
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/*
|
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|
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commit f528072216dec01cee7ca35d94e171a3b909e677
|
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Author: Nicolas Ruff <nruff@google.com>
|
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Date: Mon Sep 1 14:51:07 2014 +0200
|
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|
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Fix stack-based buffer overflow in rfbFileTransferOffer message, FileTime processing
|
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diff --git a/libvncserver/rfbserver.c b/libvncserver/rfbserver.c
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index 445331a..23532b0 100644
|
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--- a/libvncserver/rfbserver.c
|
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+++ b/libvncserver/rfbserver.c
|
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@@ -1683,16 +1683,17 @@ rfbBool rfbProcessFileTransfer(rfbClientPtr cl, uint8_t contentType, uint8_t con
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*/
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if ((buffer = rfbProcessFileTransferReadBuffer(cl, length))==NULL) return FALSE;
|
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- /* Parse the FileTime */
|
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+ /* Parse the FileTime
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+ * TODO: FileTime is actually never used afterwards
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+ */
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p = strrchr(buffer, ',');
|
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if (p!=NULL) {
|
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*p = '\0';
|
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- strcpy(szFileTime, p+1);
|
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+ strncpy(szFileTime, p+1, sizeof(szFileTime));
|
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+ szFileTime[sizeof(szFileTime)-1] = '\x00'; /* ensure NULL terminating byte is present, even if copy overflowed */
|
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} else
|
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szFileTime[0]=0;
|
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|
||||
-
|
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-
|
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/* Need to read in sizeHtmp */
|
||||
if ((n = rfbReadExact(cl, (char *)&sizeHtmp, 4)) <= 0) {
|
||||
if (n != 0)
|
||||
@ -1,25 +0,0 @@
|
||||
diff -up LibVNCServer-0.9.10/configure.ac.no_x11vnc LibVNCServer-0.9.10/configure.ac
|
||||
--- LibVNCServer-0.9.10/configure.ac.no_x11vnc 2014-04-05 18:38:35.000000000 -0500
|
||||
+++ LibVNCServer-0.9.10/configure.ac 2014-04-29 09:06:27.336448096 -0500
|
||||
@@ -1020,7 +1020,7 @@ if test "$build_x11vnc" = "yes"; then
|
||||
#
|
||||
# configure.ac:690: required file `x11vnc/Makefile.in' not found
|
||||
#
|
||||
- AC_CONFIG_FILES([x11vnc/Makefile x11vnc/misc/Makefile x11vnc/misc/turbovnc/Makefile])
|
||||
+ #AC_CONFIG_FILES([x11vnc/Makefile x11vnc/misc/Makefile x11vnc/misc/turbovnc/Makefile])
|
||||
|
||||
if test ! -z "$with_system_libvncserver" -a "x$with_system_libvncserver" != "xno"; then
|
||||
# need to move local tarball rfb headers aside:
|
||||
diff -up LibVNCServer-0.9.10/Makefile.am.no_x11vnc LibVNCServer-0.9.10/Makefile.am
|
||||
--- LibVNCServer-0.9.10/Makefile.am.no_x11vnc 2014-04-05 18:38:35.000000000 -0500
|
||||
+++ LibVNCServer-0.9.10/Makefile.am 2014-04-29 09:06:27.337448086 -0500
|
||||
@@ -1,6 +1,6 @@
|
||||
-if WITH_X11VNC
|
||||
-X11VNC=x11vnc
|
||||
-endif
|
||||
+#if WITH_X11VNC
|
||||
+#X11VNC=x11vnc
|
||||
+#endif
|
||||
|
||||
SUBDIRS=libvncserver examples libvncclient vncterm webclients client_examples test $(X11VNC)
|
||||
DIST_SUBDIRS=libvncserver examples libvncclient vncterm webclients client_examples test
|
||||
@ -1,26 +0,0 @@
|
||||
diff -up LibVNCServer-0.9.9/libvncclient.pc.in.pkgconfig LibVNCServer-0.9.9/libvncclient.pc.in
|
||||
--- LibVNCServer-0.9.9/libvncclient.pc.in.pkgconfig 2012-05-04 09:19:00.000000000 -0500
|
||||
+++ LibVNCServer-0.9.9/libvncclient.pc.in 2013-02-14 10:45:18.902001014 -0600
|
||||
@@ -7,6 +7,8 @@ Name: LibVNCClient
|
||||
Description: A library for easy implementation of a VNC client.
|
||||
Version: @VERSION@
|
||||
Requires:
|
||||
-Libs: -L${libdir} -lvncclient @LIBS@ @WSOCKLIB@
|
||||
+Requires.private: zlib
|
||||
+Libs: -L${libdir} -lvncclient
|
||||
+Libs.private: @LIBS@ @WSOCKLIB@
|
||||
Cflags: -I${includedir}
|
||||
|
||||
diff -up LibVNCServer-0.9.9/libvncserver.pc.in.pkgconfig LibVNCServer-0.9.9/libvncserver.pc.in
|
||||
--- LibVNCServer-0.9.9/libvncserver.pc.in.pkgconfig 2012-05-04 09:19:00.000000000 -0500
|
||||
+++ LibVNCServer-0.9.9/libvncserver.pc.in 2013-02-14 10:44:49.727365748 -0600
|
||||
@@ -7,6 +7,8 @@ Name: LibVNCServer
|
||||
Description: A library for easy implementation of a VNC server.
|
||||
Version: @VERSION@
|
||||
Requires:
|
||||
-Libs: -L${libdir} -lvncserver @LIBS@ @WSOCKLIB@
|
||||
+Requires.private: zlib
|
||||
+Libs: -L${libdir} -lvncserver
|
||||
+Libs.private: @LIBS@ @WSOCKLIB@
|
||||
Cflags: -I${includedir}
|
||||
|
||||
Loading…
Reference in new issue