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Debian Security Advisory DSA 1750-1 (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 to libpng announced via advisory DSA 1750-1.
Insight
Insight
Several vulnerabilities have been discovered in libpng, a library for reading and writing PNG files. The Common Vulnerabilities and Exposures project identifies the following problems: The png_handle_tRNS function allows attackers to cause a denial of service (application crash) via a grayscale PNG image with a bad tRNS chunk CRC value. (CVE-2007-2445) Certain chunk handlers allow attackers to cause a denial of service (crash) via crafted pCAL, sCAL, tEXt, iTXt, and ztXT chunking in PNG images, which trigger out-of-bounds read operations. (CVE-2007-5269) libpng allows context-dependent attackers to cause a denial of service (crash) and possibly execute arbitrary code via a PNG file with zero length unknown chunks, which trigger an access of uninitialized memory. (CVE-2008-1382) The png_check_keyword might allow context-dependent attackers to set the value of an arbitrary memory location to zero via vectors involving creation of crafted PNG files with keywords. (CVE-2008-5907) A memory leak in the png_handle_tEXt function allows context-dependent attackers to cause a denial of service (memory exhaustion) via a crafted PNG file. (CVE-2008-6218) libpng allows context-dependent attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted PNG file that triggers a free of an uninitialized pointer in (1) the png_read_png function, (2) pCAL chunk handling, or (3) setup of 16-bit gamma tables. (CVE-2009-0040) For the old stable distribution (etch), these problems have been fixed in version1.2.15~beta5-1+etch2. For the stable distribution (lenny), these problems have been fixed in version 1.2.27-2+lenny2. (Only CVE-2008-5907, CVE-2008-5907 and CVE-2009-0040 affect the stable distribution.) For the unstable distribution (sid), these problems have been fixed in version 1.2.35-1. We recommend that you upgrade your libpng packages.
Solution
Solution
https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201750-1