libxslt: Fix for CVE-2024-55549

Upstream-Commit: https://gitlab.gnome.org/GNOME/libxslt/-/commit/46041b65f2fbddf5c284ee1a1332fa2c515c0515

(From OE-Core rev: eae0c33539f302124544373b74bd6883467ff549)

Signed-off-by: Vijay Anusuri <vanusuri@mvista.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

2 files changed, 52 insertions, 1 deletions

diff --git a/meta/recipes-support/libxslt/libxslt/CVE-2024-55549.patch b/meta/recipes-support/libxslt/libxslt/CVE-2024-55549.patch
new file mode 100644
index 0000000000..88a17a4d0c
--- /dev/null
+++ b/meta/recipes-support/libxslt/libxslt/CVE-2024-55549.patch
@@ -0,0 +1,49 @@
+From 46041b65f2fbddf5c284ee1a1332fa2c515c0515 Mon Sep 17 00:00:00 2001
+From: Nick Wellnhofer <wellnhofer@aevum.de>
+Date: Thu, 5 Dec 2024 12:43:19 +0100
+Subject: [PATCH] [CVE-2024-55549] Fix UAF related to excluded namespaces
+
+Definitions of excluded namespaces could be deleted in
+xsltParseTemplateContent. Store excluded namespace URIs in the
+stylesheet's dictionary instead of referencing the namespace definition.
+
+Thanks to Ivan Fratric for the report!
+
+Fixes #127.
+
+Upstream-Status: Backport [https://gitlab.gnome.org/GNOME/libxslt/-/commit/46041b65f2fbddf5c284ee1a1332fa2c515c0515]
+CVE: CVE-2024-55549
+Signed-off-by: Vijay Anusuri <vanusuri@mvista.com>
+---
+ libxslt/xslt.c | 12 +++++++++++-
+ 1 file changed, 11 insertions(+), 1 deletion(-)
+
+diff --git a/libxslt/xslt.c b/libxslt/xslt.c
+index 69116f2..02c2e3a 100644
+--- a/libxslt/xslt.c
++++ b/libxslt/xslt.c
+@@ -153,10 +153,20 @@ xsltParseContentError(xsltStylesheetPtr style,
+  * in case of error
+  */
+ static int
+-exclPrefixPush(xsltStylesheetPtr style, xmlChar * value)
++exclPrefixPush(xsltStylesheetPtr style, xmlChar * orig)
+ {
++    xmlChar *value;
+     int i;
+ 
++    /*
++     * orig can come from a namespace definition on a node which
++     * could be deleted later, for example in xsltParseTemplateContent.
++     * Store the string in stylesheet's dict to avoid use after free.
++     */
++    value = (xmlChar *) xmlDictLookup(style->dict, orig, -1);
++    if (value == NULL)
++       return(-1);
++
+     if (style->exclPrefixMax == 0) {
+         style->exclPrefixMax = 4;
+         style->exclPrefixTab =
+-- 
+2.34.1
+
diff --git a/meta/recipes-support/libxslt/libxslt_1.1.35.bb b/meta/recipes-support/libxslt/libxslt_1.1.35.bb
index 2fd777766c..1f0d845421 100644
--- a/meta/recipes-support/libxslt/libxslt_1.1.35.bb
+++ b/meta/recipes-support/libxslt/libxslt_1.1.35.bb
@@ -13,7 +13,9 @@ LIC_FILES_CHKSUM = "file://Copyright;md5=0cd9a07afbeb24026c9b03aecfeba458"
 SECTION = "libs"
 DEPENDS = "libxml2"
 
-SRC_URI = "https://download.gnome.org/sources/libxslt/1.1/libxslt-${PV}.tar.xz"
+SRC_URI = "https://download.gnome.org/sources/libxslt/1.1/libxslt-${PV}.tar.xz \
+           file://CVE-2024-55549.patch \
+          "
 
 SRC_URI[sha256sum] = "8247f33e9a872c6ac859aa45018bc4c4d00b97e2feac9eebc10c93ce1f34dd79"