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Debian: Security update for Gnash

Several vulnerabilities have been identified in Gnash, the GNU Flash player. Tielei Wang from Georgia Tech Information Security Center discovered a vulnerability in GNU Gnash which is caused due to an integer overflow error and can be exploited to cause a heap-based buffer overflow by tricking a user into opening a specially crafted SWF file. Alexander Kurtz discovered an unsafe management of HTTP cookies. Cookie files are stored under /tmp and have predictable names, vulnerability that allows a local attacker to overwrite arbitrary files the users has write permissions for, and are also world-readable which may cause information leak.

Jakub Wilk discovered an unsafe management of temporary files during the build process. Files are stored under /tmp and have predictable names, vulnerability that allows a local attacker to overwrite arbitrary files the users has write permissions for.

Updated packages are available from security.debian.org.

-----BEGIN PGP SIGNED MESSAGE-----
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- - -------------------------------------------------------------------------
Debian Security Advisory DSA-2435-1                   security@debian.org
http://www.debian.org/security/                          Gabriele Giacone
March 19, 2012                         http://www.debian.org/security/faq
- - -------------------------------------------------------------------------

Package        : gnash
Vulnerability  : several
Problem type   : local / local (remote)
Debian-specific: no
CVE ID         : CVE-2010-4337 CVE-2011-4328 CVE-2012-1175
Debian Bug     : 605419 649384 664023

Several vulnerabilities have been identified in Gnash, the GNU Flash
player.

CVE-2012-1175 

 Tielei Wang from Georgia Tech Information Security Center discovered a
 vulnerability in GNU Gnash which is caused due to an integer overflow
 error and can be exploited to cause a heap-based buffer overflow by
 tricking a user into opening a specially crafted SWF file.

CVE-2011-4328

 Alexander Kurtz discovered an unsafe management of HTTP cookies. Cookie
 files are stored under /tmp and have predictable names, vulnerability
 that allows a local attacker to overwrite arbitrary files the users has
 write permissions for, and are also world-readable which may cause
 information leak.

CVE-2010-4337

 Jakub Wilk discovered an unsafe management of temporary files during the
 build process. Files are stored under /tmp and have predictable names,
 vulnerability that allows a local attacker to overwrite arbitrary files
 the users has write permissions for.

For the stable distribution (squeeze), this problem has been fixed in
version 0.8.8-5+squeeze1.

For the unstable distribution (sid), this problem has been fixed in
version 0.8.10-5.

We recommend that you upgrade your gnash packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: http://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org
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