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libxml2: CVE-2015-7942

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Fixes heap-based buffer overflow in xmlParseConditionalSections().

Upstream patch:
https://git.gnome.org/browse/libxml2/commit/
?id=9b8512337d14c8ddf662fcb98b0135f225a1c489

Upstream bug:
https://bugzilla.gnome.org/show_bug.cgi?id=756456

(From OE-Core rev: a2980f004519a4baeb4c88ad924e15195fe75e32)

Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com>
Signed-off-by: Tudor Florea <tudor.florea@enea.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Sona Sarmadi 2015-12-14 13:24:09 +01:00 committed by Richard Purdie
parent d54de3ebc0
commit aa10f103e1
2 changed files with 59 additions and 0 deletions
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1
meta/recipes-core/libxml/libxml2.inc
View File

@ -23,6 +23,7 @@ SRC_URI = "ftp://xmlsoft.org/libxml2/libxml2-${PV}.tar.gz;name=libtar \
file://libxml-m4-use-pkgconfig.patch \
file://libxml2-CVE-2014-3660.patch \
file://0001-CVE-2015-1819-Enforce-the-reader-to-run-in-constant-.patch \
file://CVE-2015-7942.patch \
"
BINCONFIG = "${bindir}/xml2-config"

58
meta/recipes-core/libxml/libxml2/CVE-2015-7942.patch Normal file
View File

@ -0,0 +1,58 @@
From 9b8512337d14c8ddf662fcb98b0135f225a1c489 Mon Sep 17 00:00:00 2001
From: Daniel Veillard <veillard@redhat.com>
Date: Mon, 23 Feb 2015 11:29:20 +0800
Subject: Cleanup conditional section error handling
For https://bugzilla.gnome.org/show_bug.cgi?id=744980
The error handling of Conditional Section also need to be
straightened as the structure of the document can't be
guessed on a failure there and it's better to stop parsing
as further errors are likely to be irrelevant.
Fixes CVE-2015-7942.
Upstream-Status: Backport
Upstream patch:
https://git.gnome.org/browse/libxml2/commit/
?id=9b8512337d14c8ddf662fcb98b0135f225a1c489
Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com>
---
parser.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/parser.c b/parser.c
index bbe97eb..fe603ac 100644
--- a/parser.c
+++ b/parser.c
@@ -6770,6 +6770,8 @@ xmlParseConditionalSections(xmlParserCtxtPtr ctxt) {
SKIP_BLANKS;
if (RAW != '[') {
xmlFatalErr(ctxt, XML_ERR_CONDSEC_INVALID, NULL);
+ xmlStopParser(ctxt);
+ return;
} else {
if (ctxt->input->id != id) {
xmlValidityError(ctxt, XML_ERR_ENTITY_BOUNDARY,
@@ -6830,6 +6832,8 @@ xmlParseConditionalSections(xmlParserCtxtPtr ctxt) {
SKIP_BLANKS;
if (RAW != '[') {
xmlFatalErr(ctxt, XML_ERR_CONDSEC_INVALID, NULL);
+ xmlStopParser(ctxt);
+ return;
} else {
if (ctxt->input->id != id) {
xmlValidityError(ctxt, XML_ERR_ENTITY_BOUNDARY,
@@ -6885,6 +6889,8 @@ xmlParseConditionalSections(xmlParserCtxtPtr ctxt) {
} else {
xmlFatalErr(ctxt, XML_ERR_CONDSEC_INVALID_KEYWORD, NULL);
+ xmlStopParser(ctxt);
+ return;
}
if (RAW == 0)
--
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