Fix CVE-2023-39615 (RHEL-5179)

Resolves: RHEL-5179

libxml2-2.11.0-fix-CVE-2023-39615.patch

@@ -0,0 +1,32 @@
+From d0c3f01e110d54415611c5fa0040cdf4a56053f9 Mon Sep 17 00:00:00 2001
+From: Nick Wellnhofer <wellnhofer@aevum.de>
+Date: Sat, 6 May 2023 17:47:37 +0200
+Subject: [PATCH] parser: Fix old SAX1 parser with custom callbacks
+
+For some reason, xmlCtxtUseOptionsInternal set the start and end element
+SAX handlers to the internal DOM builder functions when XML_PARSE_SAX1
+was specified. This means that custom SAX handlers could never work with
+that flag because these functions would receive the wrong user data
+argument and crash immediately.
+
+Fixes #535.
+---
+ parser.c | 2 --
+ 1 file changed, 2 deletions(-)
+
+diff --git a/parser.c b/parser.c
+index bb05791d3..0c8bed129 100644
+--- a/parser.c
++++ b/parser.c
+@@ -14479,8 +14479,6 @@ xmlCtxtUseOptionsInternal(xmlParserCtxtPtr ctxt, int options, const char *encodi
+     }
+ #ifdef LIBXML_SAX1_ENABLED
+     if (options & XML_PARSE_SAX1) {
+-        ctxt->sax->startElement = xmlSAX2StartElement;
+-        ctxt->sax->endElement = xmlSAX2EndElement;
+         ctxt->sax->startElementNs = NULL;
+         ctxt->sax->endElementNs = NULL;
+         ctxt->sax->initialized = 1;
+-- 
+GitLab
+

libxml2.spec

@@ -7,7 +7,7 @@
 
 Name:           libxml2
 Version:        2.9.7
-Release:        17%{?dist}
+Release:        18%{?dist}
 Summary:        Library providing XML and HTML support
 
 License:        MIT
@@ -60,6 +60,8 @@ Patch20:        libxml2-2.9.7-CVE-2022-40304.patch
 Patch21:         libxml2-2.9.13-CVE-2023-28484.patch
 Patch22:         libxml2-2.9.13-CVE-2023-28484.2.patch
 Patch23:         libxml2-2.9.7-CVE-2023-29469.patch
+# https://issues.redhat.com/browse/RHEL-5179
+Patch24:         libxml2-2.11.0-fix-CVE-2023-39615.patch
 
 BuildRequires:  gcc
 BuildRequires:  cmake-rpm-macros
@@ -231,6 +233,9 @@ gzip -9 -c doc/libxml2-api.xml > doc/libxml2-api.xml.gz
 %{python3_sitearch}/libxml2mod.so
 
 %changelog
+* Thu Sep 14 2023 David King <amigadave@amigadave.com> - 2.9.7-18
+- Fix CVE-2023-39615 (RHEL-5179)
+
 * Fri Jul 14 2023 David King <amigadave@amigadave.com> - 2.9.7-17
 - Fix CVE-2023-28484 (#2186692)
 - Fix CVE-2023-29469 (#2186692)