remote command execution in XFree86-libs, xshared

Chris Evans reported three vulnerabilities in libXpm which can be exploited remotely by providing malformed XPM image files. The function xpmParseColors() is vulnerable to an integer overflow and a stack-based buffer overflow. The functions ParseAndPutPixels() as well as ParsePixels() is vulnerable to a stack-based buffer overflow too. Additionally Matthieu Herrb found two one-byte buffer overflows.

Solution

There is no workaround known.