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Mandriva Update for libpng MDVSA-2011:151 (libpng)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
The remote host is missing an update for the 'libpng' package(s) announced via the referenced advisory.
Insight
Insight
Multiple vulnerabilities has been discovered and corrected in libpng: The png_format_buffer function in pngerror.c in libpng allows remote attackers to cause a denial of service (application crash) via a crafted PNG image that triggers an out-of-bounds read during the copying of error-message data. NOTE: this vulnerability exists because of a CVE-2004-0421 regression (CVE-2011-2501). Buffer overflow in libpng, when used by an application that calls the png_rgb_to_gray function but not the png_set_expand function, allows remote attackers to overwrite memory with an arbitrary amount of data, and possibly have unspecified other impact, via a crafted PNG image (CVE-2011-2690). The png_err function in pngerror.c in libpng makes a function call using a NULL pointer argument instead of an empty-string argument, which allows remote attackers to cause a denial of service (application crash) via a crafted PNG image (CVE-2011-2691). NOTE: This does not affect the binary packages in Mandriva, but could affect users if PNG_NO_ERROR_TEXT is defined using the libpng-source-1.?.?? package. The png_handle_sCAL function in pngrutil.c in libpng does not properly handle invalid sCAL chunks, which allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly have unspecified other impact via a crafted PNG image that triggers the reading of uninitialized memory (CVE-2011-2692). The updated packages have been patched to correct these issues.
Affected Software
Affected Software
libpng on Mandriva Linux 2010.1, Mandriva Linux 2010.1/X86_64, Mandriva Enterprise Server 5, Mandriva Enterprise Server 5/X86_64
Solution
Solution
Please Install the Updated Packages.