Security Information / 2015 / Security Information -- DSA-3399-1 libpng

Debian Security Advisory

DSA-3399-1 libpng -- security update

Date Reported:

18 Nov 2015

Affected Packages:

libpng

Vulnerable:

Yes

Security database references:

In the Debian bugtracking system: Bug 803078, Bug 805113.
In Mitre's CVE dictionary: CVE-2015-7981, CVE-2015-8126.

More information:

Several vulnerabilities have been discovered in the libpng PNG library. The Common Vulnerabilities and Exposures project identifies the following problems:

• CVE-2015-7981

  Qixue Xiao discovered an out-of-bounds read vulnerability in the png_convert_to_rfc1123 function. A remote attacker can potentially take advantage of this flaw to cause disclosure of information from process memory.

• CVE-2015-8126

  Multiple buffer overflows were discovered in the png_set_PLTE and png_get_PLTE functions. A remote attacker can take advantage of this flaw to cause a denial of service (application crash) via a small bit-depth value in an IHDR (image header) chunk in a PNG image.

For the oldstable distribution (wheezy), these problems have been fixed in version 1.2.49-1+deb7u1.

For the stable distribution (jessie), these problems have been fixed in version 1.2.50-2+deb8u1.

For the unstable distribution (sid), these problems have been fixed in version 1.2.54-1.

We recommend that you upgrade your libpng packages.