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libxml2 stack buffer overflow in URI parsing


Yuuichi Teranishi reported a crash in libxml2's URI handling when a long URL is supplied. The implementation in nanohttp.c and nanoftp.c uses a 4K stack buffer, and longer URLs will overwrite the stack. This could result in denial-of-service or arbitrary code execution in applications using libxml2 to parse documents.



portaudit: libxml2 stack buffer overflow in URI parsing

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Oliver Eikemeier <>