Debian: DSA-3399-1 Critical: Libpng Memory Disclosure and DoS

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.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
fou...