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libcroco: CVE-2017-7961

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* CVE-2017-7961
The cr_tknzr_parse_rgb function in cr-tknzr.c in libcroco has an
"outside the range of representable values of type long" undefined
behavior issue, which might allow remote attackers to cause a denial
of service (application crash) or possibly have unspecified other
impact via a crafted CSS file.

CVE: CVE-2017-7961
Ref: https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-7961
(From OE-Core rev: 9b321cf141c3fa18d5b85f17ffe1710f4555ca49)

Signed-off-by: Sinan Kaya <okaya@kernel.org>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Armin Kuster
2018-09-26 18:23:20 -07:00
committed by Richard Purdie
parent c8a29e6c81
commit 242829e5b6
2 changed files with 48 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

46
meta/recipes-support/libcroco/libcroco/CVE-2017-7961.patch Normal file
View File

@@ -0,0 +1,46 @@
From 5fa3165613b77b516e2b0dc128f73b673bd3ec8b Mon Sep 17 00:00:00 2001
From: Ignacio Casal Quinteiro <qignacio@amazon.com>
Date: Sun, 16 Apr 2017 13:56:09 +0200
Subject: [PATCH] tknzr: support only max long rgb values
This fixes a possible out of bound when reading rgbs which
are longer than the support MAXLONG
Upstream-Status: Backport [https://git.gnome.org/browse/libcroco/patch/?id=9ad72875e9f08e4c519ef63d44cdbd94aa9504f7]
CVE: CVE-2017-7961
Signed-off-by: Sinan Kaya <okaya@kernel.org>
---
src/cr-tknzr.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/src/cr-tknzr.c b/src/cr-tknzr.c
index e3af0ee..76886ec 100644
--- a/src/cr-tknzr.c
+++ b/src/cr-tknzr.c
@@ -1280,6 +1280,11 @@ cr_tknzr_parse_rgb (CRTknzr * a_this, CRRgb ** a_rgb)
status = cr_tknzr_parse_num (a_this, &num);
ENSURE_PARSING_COND ((status == CR_OK) && (num != NULL));
+ if (num->val > G_MAXLONG) {
+ status = CR_PARSING_ERROR;
+ goto error;
+ }
+
red = num->val;
cr_num_destroy (num);
num = NULL;
@@ -1299,6 +1304,11 @@ cr_tknzr_parse_rgb (CRTknzr * a_this, CRRgb ** a_rgb)
status = cr_tknzr_parse_num (a_this, &num);
ENSURE_PARSING_COND ((status == CR_OK) && (num != NULL));
+ if (num->val > G_MAXLONG) {
+ status = CR_PARSING_ERROR;
+ goto error;
+ }
+
PEEK_BYTE (a_this, 1, &next_bytes[0]);
if (next_bytes[0] == '%') {
SKIP_CHARS (a_this, 1);
--
2.19.0

3
meta/recipes-support/libcroco/libcroco_0.6.12.bb
View File

@@ -16,7 +16,8 @@ BINCONFIG = "${bindir}/croco-0.6-config"
inherit gnomebase gtk-doc binconfig-disabled
SRC_URI += "file://CVE-2017-7960.patch"
SRC_URI += "file://CVE-2017-7960.patch \
file://CVE-2017-7961.patch "
SRC_URI[archive.md5sum] = "bc0984fce078ba2ce29f9500c6b9ddce"
SRC_URI[archive.sha256sum] = "ddc4b5546c9fb4280a5017e2707fbd4839034ed1aba5b7d4372212f34f84f860"