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Debian: Security update for Iceweasel

Multiple vulnerabilities have been found in Iceweasel, the Debian web browser based on Mozilla Firefox. Heap-based buffer overflow in the nsWindow::OnExposeEvent function could allow remote attackers to execute arbitrary code. Multiple unspecified vulnerabilities in the browser engine could allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code.

The HZ-GB-2312 character-set implementation does not properly handle a ~ (tilde) character in proximity to a chunk delimiter, which allows remote attackers to conduct cross-site scripting (XSS) attacks via a crafted document. The evalInSandbox implementation uses an incorrect context during the handling of JavaScript code that sets the location.href property, which allows remote attackers to conduct cross-site scripting (XSS) attacks or read arbitrary files by leveraging a sandboxed add-on. Use-after-free vulnerability in the gfxFont::GetFontEntry function allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via unspecified vectors.

Updated packages are available from security.debian.org.

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- -------------------------------------------------------------------------
Debian Security Advisory DSA-2583-1                   security@debian.org
http://www.debian.org/security/                         Yves-Alexis Perez
December 08, 2012                      http://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package        : iceweasel
Vulnerability  : several
Problem type   : remote
Debian-specific: no
CVE ID         : CVE-2012-4201 CVE-2012-4207 CVE-2012-4216 CVE-2012-5829 
                CVE-2012-5842
Debian Bug     : 

Multiple vulnerabilities have been found in Iceweasel, the Debian web browser
based on Mozilla Firefox:

CVE-2012-5829

 Heap-based buffer overflow in the nsWindow::OnExposeEvent function could
 allow remote attackers to execute arbitrary code.

CVE-2012-5842

 Multiple unspecified vulnerabilities in the browser engine could allow remote
 attackers to cause a denial of service (memory corruption and application
 crash) or possibly execute arbitrary code.

CVE-2012-4207

 The HZ-GB-2312 character-set implementation does not properly handle a ~
 (tilde) character in proximity to a chunk delimiter, which allows remote
 attackers to conduct cross-site scripting (XSS) attacks via a crafted
 document.

CVE-2012-4201

 The evalInSandbox implementation uses an incorrect context during the
 handling of JavaScript code that sets the location.href property, which
 allows remote attackers to conduct cross-site scripting (XSS) attacks or read
 arbitrary files by leveraging a sandboxed add-on.

CVE-2012-4216

 Use-after-free vulnerability in the gfxFont::GetFontEntry function allows
 remote attackers to execute arbitrary code or cause a denial of service (heap
 memory corruption) via unspecified vectors.

For the stable distribution (squeeze), these problems have been fixed in
version 3.5.16-20.

For the testing distribution (wheezy), these problems have been fixed in
version 10.0.11esr-1.

For the unstable distribution (sid), these problems have been fixed in
version 10.0.11esr-1.

We recommend that you upgrade your iceweasel 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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