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.
145 lines
4.0 KiB
145 lines
4.0 KiB
From 24dedf9b260eebb7feae6fc273208b551fe54a79 Mon Sep 17 00:00:00 2001
|
|
From: Daniel Stenberg <daniel@haxx.se>
|
|
Date: Mon, 16 May 2022 16:28:13 +0200
|
|
Subject: [PATCH 1/2] content_encoding: return error on too many compression
|
|
steps
|
|
|
|
The max allowed steps is arbitrarily set to 5.
|
|
|
|
Bug: https://curl.se/docs/CVE-2022-32206.html
|
|
CVE-2022-32206
|
|
Reported-by: Harry Sintonen
|
|
Closes #9049
|
|
|
|
Upstream-commit: 3a09fbb7f264c67c438d01a30669ce325aa508e2
|
|
Signed-off-by: Kamil Dudka <kdudka@redhat.com>
|
|
---
|
|
lib/content_encoding.c | 9 +++++++++
|
|
1 file changed, 9 insertions(+)
|
|
|
|
diff --git a/lib/content_encoding.c b/lib/content_encoding.c
|
|
index c03637a..6f994b3 100644
|
|
--- a/lib/content_encoding.c
|
|
+++ b/lib/content_encoding.c
|
|
@@ -934,6 +934,9 @@ static const content_encoding *find_encoding(const char *name, size_t len)
|
|
return NULL;
|
|
}
|
|
|
|
+/* allow no more than 5 "chained" compression steps */
|
|
+#define MAX_ENCODE_STACK 5
|
|
+
|
|
/* Set-up the unencoding stack from the Content-Encoding header value.
|
|
* See RFC 7231 section 3.1.2.2. */
|
|
CURLcode Curl_build_unencoding_stack(struct connectdata *conn,
|
|
@@ -941,6 +944,7 @@ CURLcode Curl_build_unencoding_stack(struct connectdata *conn,
|
|
{
|
|
struct Curl_easy *data = conn->data;
|
|
struct SingleRequest *k = &data->req;
|
|
+ int counter = 0;
|
|
|
|
do {
|
|
const char *name;
|
|
@@ -975,6 +979,11 @@ CURLcode Curl_build_unencoding_stack(struct connectdata *conn,
|
|
if(!encoding)
|
|
encoding = &error_encoding; /* Defer error at stack use. */
|
|
|
|
+ if(++counter >= MAX_ENCODE_STACK) {
|
|
+ failf(data, "Reject response due to %u content encodings",
|
|
+ counter);
|
|
+ return CURLE_BAD_CONTENT_ENCODING;
|
|
+ }
|
|
/* Stack the unencoding stage. */
|
|
writer = new_unencoding_writer(conn, encoding, k->writer_stack);
|
|
if(!writer)
|
|
--
|
|
2.35.3
|
|
|
|
|
|
From b3cd74f01871281f0989860e04c546d896f0e72f Mon Sep 17 00:00:00 2001
|
|
From: Daniel Stenberg <daniel@haxx.se>
|
|
Date: Mon, 16 May 2022 16:29:07 +0200
|
|
Subject: [PATCH 2/2] test387: verify rejection of compression chain attack
|
|
|
|
Upstream-commit: 7230b19a2e17a164f61f82e4e409a9777ea2421a
|
|
Signed-off-by: Kamil Dudka <kdudka@redhat.com>
|
|
---
|
|
tests/data/Makefile.inc | 1 +
|
|
tests/data/test387 | 53 +++++++++++++++++++++++++++++++++++++++++
|
|
2 files changed, 54 insertions(+)
|
|
create mode 100644 tests/data/test387
|
|
|
|
diff --git a/tests/data/Makefile.inc b/tests/data/Makefile.inc
|
|
index 98d5516..9b5f4fb 100644
|
|
--- a/tests/data/Makefile.inc
|
|
+++ b/tests/data/Makefile.inc
|
|
@@ -61,6 +61,7 @@ test325 test326 test330 \
|
|
test340 \
|
|
\
|
|
test350 test351 test352 test353 test354 \
|
|
+test387 \
|
|
test393 test394 test395 \
|
|
\
|
|
test400 test401 test402 test403 test404 test405 test406 test407 test408 \
|
|
diff --git a/tests/data/test387 b/tests/data/test387
|
|
new file mode 100644
|
|
index 0000000..015ec25
|
|
--- /dev/null
|
|
+++ b/tests/data/test387
|
|
@@ -0,0 +1,53 @@
|
|
+<testcase>
|
|
+<info>
|
|
+<keywords>
|
|
+HTTP
|
|
+gzip
|
|
+</keywords>
|
|
+</info>
|
|
+
|
|
+#
|
|
+# Server-side
|
|
+<reply>
|
|
+<data nocheck="yes">
|
|
+HTTP/1.1 200 OK
|
|
+Transfer-Encoding: gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip,gzip
|
|
+
|
|
+-foo-
|
|
+</data>
|
|
+</reply>
|
|
+
|
|
+#
|
|
+# Client-side
|
|
+<client>
|
|
+<server>
|
|
+http
|
|
+</server>
|
|
+ <name>
|
|
+Response with overly long compression chain
|
|
+ </name>
|
|
+ <command>
|
|
+http://%HOSTIP:%HTTPPORT/%TESTNUMBER -sS
|
|
+</command>
|
|
+</client>
|
|
+
|
|
+#
|
|
+# Verify data after the test has been "shot"
|
|
+<verify>
|
|
+<protocol>
|
|
+GET /%TESTNUMBER HTTP/1.1
|
|
+Host: %HOSTIP:%HTTPPORT
|
|
+User-Agent: curl/7.61.1
|
|
+Accept: */*
|
|
+
|
|
+</protocol>
|
|
+
|
|
+# CURLE_BAD_CONTENT_ENCODING is 61
|
|
+<errorcode>
|
|
+61
|
|
+</errorcode>
|
|
+<stderr mode="text">
|
|
+curl: (61) Reject response due to 5 content encodings
|
|
+</stderr>
|
|
+</verify>
|
|
+</testcase>
|
|
--
|
|
2.35.3
|
|
|