From: Guilhem Moulin <guilhem@debian.org>
Date: Sat, 30 Dec 2023 14:15:54 +0100
Subject: Avoid reachable assertion via crafted XML document with a '\0'
 located after whitespace

Upstream: https://salsa.debian.org/debian/tinyxml/-/raw/2366e1f23d059d4c20c43c54176b6bd78d6a83fc/debian/patches/CVE-2023-34194.patch

CVE: CVE-2023-34194

Bug: https://www.forescout.com/resources/sierra21-vulnerabilities
Bug-Debian: https://bugs.debian.org/1059315
Bug-Debian: https://security-tracker.debian.org/tracker/CVE-2023-34194
Bug-Debian: https://security-tracker.debian.org/tracker/CVE-2023-40462
Signed-off-by: Titouan Christophe <titouan.christophe@mind.be>
---
 tinyxmlparser.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/tinyxmlparser.cpp b/src/tinyxmlparser.cpp
index 8aa0dfa..1601962 100644
--- a/src/tinyxmlparser.cpp
+++ b/src/tinyxmlparser.cpp
@@ -1606,6 +1606,10 @@ const char* TiXmlDeclaration::Parse( const char* p, TiXmlParsingData* data, TiXm
 		}
 
 		p = SkipWhiteSpace( p, _encoding );
+		if ( !p || !*p )
+		{
+			break;
+		}
 		if ( StringEqual( p, "version", true, _encoding ) )
 		{
 			TiXmlAttribute attrib;