You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
355 lines
8.1 KiB
355 lines
8.1 KiB
From a1ec463c8207bde97b3575d12e396e999a55a8d0 Mon Sep 17 00:00:00 2001
|
|
From: Patrick Monnerat <patrick@monnerat.net>
|
|
Date: Tue, 7 Sep 2021 13:26:42 +0200
|
|
Subject: [PATCH] ftp,imap,pop3,smtp: reject STARTTLS server response
|
|
pipelining
|
|
|
|
If a server pipelines future responses within the STARTTLS response, the
|
|
former are preserved in the pingpong cache across TLS negotiation and
|
|
used as responses to the encrypted commands.
|
|
|
|
This fix detects pipelined STARTTLS responses and rejects them with an
|
|
error.
|
|
|
|
CVE-2021-22947
|
|
|
|
Bug: https://curl.se/docs/CVE-2021-22947.html
|
|
|
|
Upstream-commit: 8ef147c43646e91fdaad5d0e7b60351f842e5c68
|
|
Signed-off-by: Kamil Dudka <kdudka@redhat.com>
|
|
---
|
|
lib/ftp.c | 3 +++
|
|
lib/imap.c | 4 +++
|
|
lib/pop3.c | 4 +++
|
|
lib/smtp.c | 4 +++
|
|
tests/data/Makefile.inc | 2 +-
|
|
tests/data/test980 | 52 ++++++++++++++++++++++++++++++++++++
|
|
tests/data/test981 | 59 +++++++++++++++++++++++++++++++++++++++++
|
|
tests/data/test982 | 57 +++++++++++++++++++++++++++++++++++++++
|
|
tests/data/test983 | 52 ++++++++++++++++++++++++++++++++++++
|
|
9 files changed, 236 insertions(+), 1 deletion(-)
|
|
create mode 100644 tests/data/test980
|
|
create mode 100644 tests/data/test981
|
|
create mode 100644 tests/data/test982
|
|
create mode 100644 tests/data/test983
|
|
|
|
diff --git a/lib/ftp.c b/lib/ftp.c
|
|
index 71f998e..e920138 100644
|
|
--- a/lib/ftp.c
|
|
+++ b/lib/ftp.c
|
|
@@ -2688,6 +2688,9 @@ static CURLcode ftp_statemach_act(struct connectdata *conn)
|
|
case FTP_AUTH:
|
|
/* we have gotten the response to a previous AUTH command */
|
|
|
|
+ if(pp->cache_size)
|
|
+ return CURLE_WEIRD_SERVER_REPLY; /* Forbid pipelining in response. */
|
|
+
|
|
/* RFC2228 (page 5) says:
|
|
*
|
|
* If the server is willing to accept the named security mechanism,
|
|
diff --git a/lib/imap.c b/lib/imap.c
|
|
index feb7445..09bc5d6 100644
|
|
--- a/lib/imap.c
|
|
+++ b/lib/imap.c
|
|
@@ -939,6 +939,10 @@ static CURLcode imap_state_starttls_resp(struct connectdata *conn,
|
|
|
|
(void)instate; /* no use for this yet */
|
|
|
|
+ /* Pipelining in response is forbidden. */
|
|
+ if(conn->proto.imapc.pp.cache_size)
|
|
+ return CURLE_WEIRD_SERVER_REPLY;
|
|
+
|
|
if(imapcode != IMAP_RESP_OK) {
|
|
if(data->set.use_ssl != CURLUSESSL_TRY) {
|
|
failf(data, "STARTTLS denied");
|
|
diff --git a/lib/pop3.c b/lib/pop3.c
|
|
index 7698d1c..dccfced 100644
|
|
--- a/lib/pop3.c
|
|
+++ b/lib/pop3.c
|
|
@@ -750,6 +750,10 @@ static CURLcode pop3_state_starttls_resp(struct connectdata *conn,
|
|
|
|
(void)instate; /* no use for this yet */
|
|
|
|
+ /* Pipelining in response is forbidden. */
|
|
+ if(conn->proto.pop3c.pp.cache_size)
|
|
+ return CURLE_WEIRD_SERVER_REPLY;
|
|
+
|
|
if(pop3code != '+') {
|
|
if(data->set.use_ssl != CURLUSESSL_TRY) {
|
|
failf(data, "STARTTLS denied");
|
|
diff --git a/lib/smtp.c b/lib/smtp.c
|
|
index 1defb25..1f89777 100644
|
|
--- a/lib/smtp.c
|
|
+++ b/lib/smtp.c
|
|
@@ -685,6 +685,10 @@ static CURLcode smtp_state_starttls_resp(struct connectdata *conn,
|
|
|
|
(void)instate; /* no use for this yet */
|
|
|
|
+ /* Pipelining in response is forbidden. */
|
|
+ if(conn->proto.smtpc.pp.cache_size)
|
|
+ return CURLE_WEIRD_SERVER_REPLY;
|
|
+
|
|
if(smtpcode != 220) {
|
|
if(data->set.use_ssl != CURLUSESSL_TRY) {
|
|
failf(data, "STARTTLS denied, code %d", smtpcode);
|
|
diff --git a/tests/data/Makefile.inc b/tests/data/Makefile.inc
|
|
index 163ce59..42b0569 100644
|
|
--- a/tests/data/Makefile.inc
|
|
+++ b/tests/data/Makefile.inc
|
|
@@ -108,7 +108,7 @@ test927 test928 test929 test930 test931 test932 test933 test934 test935 \
|
|
test936 test937 test938 test939 test940 test941 test942 test943 test944 \
|
|
test945 test946 test947 test948 test949 test950 test951 test952 \
|
|
\
|
|
-test984 test985 test986 \
|
|
+test980 test981 test982 test983 test984 test985 test986 \
|
|
\
|
|
test1000 test1001 test1002 test1003 test1004 test1005 test1006 test1007 \
|
|
test1008 test1009 test1010 test1011 test1012 test1013 test1014 test1015 \
|
|
diff --git a/tests/data/test980 b/tests/data/test980
|
|
new file mode 100644
|
|
index 0000000..97567f8
|
|
--- /dev/null
|
|
+++ b/tests/data/test980
|
|
@@ -0,0 +1,52 @@
|
|
+<testcase>
|
|
+<info>
|
|
+<keywords>
|
|
+SMTP
|
|
+STARTTLS
|
|
+</keywords>
|
|
+</info>
|
|
+
|
|
+#
|
|
+# Server-side
|
|
+<reply>
|
|
+<servercmd>
|
|
+CAPA STARTTLS
|
|
+AUTH PLAIN
|
|
+REPLY STARTTLS 454 currently unavailable\r\n235 Authenticated\r\n250 2.1.0 Sender ok\r\n250 2.1.5 Recipient ok\r\n354 Enter mail\r\n250 2.0.0 Accepted
|
|
+REPLY AUTH 535 5.7.8 Authentication credentials invalid
|
|
+</servercmd>
|
|
+</reply>
|
|
+
|
|
+#
|
|
+# Client-side
|
|
+<client>
|
|
+<features>
|
|
+SSL
|
|
+</features>
|
|
+<server>
|
|
+smtp
|
|
+</server>
|
|
+ <name>
|
|
+SMTP STARTTLS pipelined server response
|
|
+ </name>
|
|
+<stdin>
|
|
+mail body
|
|
+</stdin>
|
|
+ <command>
|
|
+smtp://%HOSTIP:%SMTPPORT/%TESTNUMBER --mail-rcpt recipient@example.com --mail-from sender@example.com -u user:secret --ssl --sasl-ir -T -
|
|
+</command>
|
|
+</client>
|
|
+
|
|
+#
|
|
+# Verify data after the test has been "shot"
|
|
+<verify>
|
|
+# 8 is CURLE_WEIRD_SERVER_REPLY
|
|
+<errorcode>
|
|
+8
|
|
+</errorcode>
|
|
+<protocol>
|
|
+EHLO %TESTNUMBER
|
|
+STARTTLS
|
|
+</protocol>
|
|
+</verify>
|
|
+</testcase>
|
|
diff --git a/tests/data/test981 b/tests/data/test981
|
|
new file mode 100644
|
|
index 0000000..2b98ce4
|
|
--- /dev/null
|
|
+++ b/tests/data/test981
|
|
@@ -0,0 +1,59 @@
|
|
+<testcase>
|
|
+<info>
|
|
+<keywords>
|
|
+IMAP
|
|
+STARTTLS
|
|
+</keywords>
|
|
+</info>
|
|
+
|
|
+#
|
|
+# Server-side
|
|
+<reply>
|
|
+<servercmd>
|
|
+CAPA STARTTLS
|
|
+REPLY STARTTLS A002 BAD currently unavailable\r\nA003 OK Authenticated\r\nA004 OK Accepted
|
|
+REPLY LOGIN A003 BAD Authentication credentials invalid
|
|
+</servercmd>
|
|
+</reply>
|
|
+
|
|
+#
|
|
+# Client-side
|
|
+<client>
|
|
+<features>
|
|
+SSL
|
|
+</features>
|
|
+<server>
|
|
+imap
|
|
+</server>
|
|
+ <name>
|
|
+IMAP STARTTLS pipelined server response
|
|
+ </name>
|
|
+ <command>
|
|
+imap://%HOSTIP:%IMAPPORT/%TESTNUMBER -T log/upload%TESTNUMBER -u user:secret --ssl
|
|
+</command>
|
|
+<file name="log/upload%TESTNUMBER">
|
|
+Date: Mon, 7 Feb 1994 21:52:25 -0800 (PST)
|
|
+From: Fred Foobar <foobar@example.COM>
|
|
+Subject: afternoon meeting
|
|
+To: joe@example.com
|
|
+Message-Id: <B27397-0100000@example.COM>
|
|
+MIME-Version: 1.0
|
|
+Content-Type: TEXT/PLAIN; CHARSET=US-ASCII
|
|
+
|
|
+Hello Joe, do you think we can meet at 3:30 tomorrow?
|
|
+</file>
|
|
+</client>
|
|
+
|
|
+#
|
|
+# Verify data after the test has been "shot"
|
|
+<verify>
|
|
+# 8 is CURLE_WEIRD_SERVER_REPLY
|
|
+<errorcode>
|
|
+8
|
|
+</errorcode>
|
|
+<protocol>
|
|
+A001 CAPABILITY
|
|
+A002 STARTTLS
|
|
+</protocol>
|
|
+</verify>
|
|
+</testcase>
|
|
diff --git a/tests/data/test982 b/tests/data/test982
|
|
new file mode 100644
|
|
index 0000000..9e07cc0
|
|
--- /dev/null
|
|
+++ b/tests/data/test982
|
|
@@ -0,0 +1,57 @@
|
|
+<testcase>
|
|
+<info>
|
|
+<keywords>
|
|
+POP3
|
|
+STARTTLS
|
|
+</keywords>
|
|
+</info>
|
|
+
|
|
+#
|
|
+# Server-side
|
|
+<reply>
|
|
+<servercmd>
|
|
+CAPA STLS USER
|
|
+REPLY STLS -ERR currently unavailable\r\n+OK user accepted\r\n+OK authenticated
|
|
+REPLY PASS -ERR Authentication credentials invalid
|
|
+</servercmd>
|
|
+<data nocheck="yes">
|
|
+From: me@somewhere
|
|
+To: fake@nowhere
|
|
+
|
|
+body
|
|
+
|
|
+--
|
|
+ yours sincerely
|
|
+</data>
|
|
+</reply>
|
|
+
|
|
+#
|
|
+# Client-side
|
|
+<client>
|
|
+<features>
|
|
+SSL
|
|
+</features>
|
|
+<server>
|
|
+pop3
|
|
+</server>
|
|
+ <name>
|
|
+POP3 STARTTLS pipelined server response
|
|
+ </name>
|
|
+ <command>
|
|
+pop3://%HOSTIP:%POP3PORT/%TESTNUMBER -u user:secret --ssl
|
|
+ </command>
|
|
+</client>
|
|
+
|
|
+#
|
|
+# Verify data after the test has been "shot"
|
|
+<verify>
|
|
+# 8 is CURLE_WEIRD_SERVER_REPLY
|
|
+<errorcode>
|
|
+8
|
|
+</errorcode>
|
|
+<protocol>
|
|
+CAPA
|
|
+STLS
|
|
+</protocol>
|
|
+</verify>
|
|
+</testcase>
|
|
diff --git a/tests/data/test983 b/tests/data/test983
|
|
new file mode 100644
|
|
index 0000000..300ec45
|
|
--- /dev/null
|
|
+++ b/tests/data/test983
|
|
@@ -0,0 +1,52 @@
|
|
+<testcase>
|
|
+<info>
|
|
+<keywords>
|
|
+FTP
|
|
+STARTTLS
|
|
+</keywords>
|
|
+</info>
|
|
+
|
|
+#
|
|
+# Server-side
|
|
+<reply>
|
|
+<servercmd>
|
|
+REPLY AUTH 500 unknown command\r\n500 unknown command\r\n331 give password\r\n230 Authenticated\r\n257 "/"\r\n200 OK\r\n200 OK\r\n200 OK\r\n226 Transfer complete
|
|
+REPLY PASS 530 Login incorrect
|
|
+</servercmd>
|
|
+</reply>
|
|
+
|
|
+# Client-side
|
|
+<client>
|
|
+<features>
|
|
+SSL
|
|
+</features>
|
|
+<server>
|
|
+ftp
|
|
+</server>
|
|
+ <name>
|
|
+FTP STARTTLS pipelined server response
|
|
+ </name>
|
|
+<file name="log/test%TESTNUMBER.txt">
|
|
+data
|
|
+ to
|
|
+ see
|
|
+that FTPS
|
|
+works
|
|
+ so does it?
|
|
+</file>
|
|
+ <command>
|
|
+--ssl --ftp-ssl-control ftp://%HOSTIP:%FTPPORT/%TESTNUMBER -T log/test%TESTNUMBER.txt -u user:secret -P %CLIENTIP
|
|
+</command>
|
|
+</client>
|
|
+
|
|
+# Verify data after the test has been "shot"
|
|
+<verify>
|
|
+# 8 is CURLE_WEIRD_SERVER_REPLY
|
|
+<errorcode>
|
|
+8
|
|
+</errorcode>
|
|
+<protocol>
|
|
+AUTH SSL
|
|
+</protocol>
|
|
+</verify>
|
|
+</testcase>
|
|
--
|
|
2.31.1
|
|
|