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curl/backport-CVE-2023-23916.patch

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fix CVE-2023-23914 CVE-2023-23915 CVE-2023-23916
2023-02-18 02:16:48 +00:00
From 119fb187192a9ea13dc90d9d20c215fc82799ab9 Mon Sep 17 00:00:00 2001
From: Patrick Monnerat <patrick@monnerat.net>
Date: Mon, 13 Feb 2023 08:33:09 +0100
Subject: [PATCH] content_encoding: do not reset stage counter for each header
Test 418 verifies
Closes #10492
Conflict: Context adaptation
Reference: https://github.com/curl/curl/commit/119fb187192a9ea13dc
---
lib/content_encoding.c | 7 +-
lib/urldata.h | 1 +
tests/data/Makefile.inc | 2 +-
tests/data/test387 | 2 +-
tests/data/test418 | 152 ++++++++++++++++++++++++++++++++++++++++
5 files changed, 158 insertions(+), 6 deletions(-)
create mode 100644 tests/data/test418
diff --git a/lib/content_encoding.c b/lib/content_encoding.c
index bfc13e2..94344d6 100644
--- a/lib/content_encoding.c
+++ b/lib/content_encoding.c
@@ -1045,7 +1045,6 @@ CURLcode Curl_build_unencoding_stack(struct Curl_easy *data,
const char *enclist, int maybechunked)
{
struct SingleRequest *k = &data->req;
- int counter = 0;
do {
const char *name;
@@ -1080,9 +1079,9 @@ CURLcode Curl_build_unencoding_stack(struct Curl_easy *data,
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);
+ if(k->writer_stack_depth++ >= MAX_ENCODE_STACK) {
+ failf(data, "Reject response due to more than %u content encodings",
+ MAX_ENCODE_STACK);
return CURLE_BAD_CONTENT_ENCODING;
}
/* Stack the unencoding stage. */
diff --git a/lib/urldata.h b/lib/urldata.h
index 8246ee8..5ef31f5 100644
--- a/lib/urldata.h
+++ b/lib/urldata.h
@@ -709,6 +709,7 @@ struct SingleRequest {
struct dohdata *doh; /* DoH specific data for this request */
#endif
unsigned char setcookies;
+ unsigned char writer_stack_depth; /* Unencoding stack depth. */
BIT(header); /* incoming data has HTTP header */
BIT(content_range); /* set TRUE if Content-Range: was found */
BIT(upload_done); /* set to TRUE when doing chunked transfer-encoding
diff --git a/tests/data/Makefile.inc b/tests/data/Makefile.inc
index 7eb0368..5f128a7 100644
--- a/tests/data/Makefile.inc
+++ b/tests/data/Makefile.inc
@@ -68,7 +68,7 @@ test380 test381 test383 test384 test385 test386 test387 test388 test389 \
test390 test391 test392 test393 test394 test395 test396 test397 test398 \
test399 test400 test401 test402 test403 test404 test405 test406 test407 \
test408 test409 test410 test411 test412 test413 test414 test415 \
-\
+ test418 \
test430 test431 test432 test433 test434 test435 test436 \
\
test440 test441 test442 test443 test444 test445 test446 \
diff --git a/tests/data/test387 b/tests/data/test387
index 015ec25..644fc7f 100644
--- a/tests/data/test387
+++ b/tests/data/test387
@@ -47,7 +47,7 @@ Accept: */*
61
</errorcode>
<stderr mode="text">
-curl: (61) Reject response due to 5 content encodings
+curl: (61) Reject response due to more than 5 content encodings
</stderr>
</verify>
</testcase>
diff --git a/tests/data/test418 b/tests/data/test418
new file mode 100644
index 0000000..50e974e
--- /dev/null
+++ b/tests/data/test418
@@ -0,0 +1,152 @@
+<testcase>
+<info>
+<keywords>
+HTTP
+gzip
+</keywords>
+</info>
+
+#
+# Server-side
+<reply>
+<data nocheck="yes">
+HTTP/1.1 200 OK
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+Transfer-Encoding: gzip
+
+-foo-
+</data>
+</reply>
+
+#
+# Client-side
+<client>
+<server>
+http
+</server>
+ <name>
+Response with multiple Transfer-Encoding headers
+ </name>
+ <command>
+http://%HOSTIP:%HTTPPORT/%TESTNUMBER -sS
+</command>
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+<protocol crlf="yes">
+GET /%TESTNUMBER HTTP/1.1
+Host: %HOSTIP:%HTTPPORT
+User-Agent: curl/%VERSION
+Accept: */*
+
+</protocol>
+
+# CURLE_BAD_CONTENT_ENCODING is 61
+<errorcode>
+61
+</errorcode>
+<stderr mode="text">
+curl: (61) Reject response due to more than 5 content encodings
+</stderr>
+</verify>
+</testcase>
--
2.33.0
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