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d139a43533
Bug: https://bugs.gentoo.org/817863 Signed-off-by: Bernard Cafarelli <voyageur@gentoo.org>
24 lines
795 B
Diff
24 lines
795 B
Diff
Description: In stamp always advance the pointer if *p= 0xef
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.
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The current implementation only advanced if 0xef is followed
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by two non-zero bytes. In case of malformed input (0xef should be
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the start byte of a three byte character) this leads to an infinite
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loop. (CVE-2021-42260)
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Origin: https://sourceforge.net/p/tinyxml/git/merge-requests/1/
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--- a/tinyxmlparser.cpp
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+++ b/tinyxmlparser.cpp
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@@ -274,6 +274,12 @@ void TiXmlParsingData::Stamp( const char* now, TiXmlEncoding encoding )
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else
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{ p +=3; ++col; } // A normal character.
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}
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+ else
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+ {
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+ // TIXML_UTF_LEAD_0 (239) is the start character of a 3 byte sequence, so
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+ // there is something wrong here. Just advance the pointer to evade infinite loops
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+ ++p;
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+ }
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}
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else
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{
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