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Vulnerability Alert

Mozilla Firefox, Thunderbird, and SeaMonkey GIF Image Processing Buffer Overflow Arbitrary Code Execution Vulnerability

 
Threat Type:CWE-119: Buffer Errors
IntelliShield ID:27451
Version:2
First Published:2012 November 21 11:50 GMT
Last Published:2012 December 10 13:42 GMT
Port: Not available
CVE:CVE-2012-4202
BugTraq ID:56607
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Moderate Damage
CVSS Base:9.3 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:6.9
 
 
Version Summary:CentOS has released updated packages to address the Mozilla Firefox, Thunderbird, and SeaMonkey GIF image processing buffer overflow arbitrary code execution vulnerability.
 
 
Description
Mozilla Firefox, Thunderbird and SeaMonkey contain a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code on a targeted system.

The vulnerability exists due to insufficient bounds checks while rendering Graphics Interchange Format (GIF) images by the affected software. An unauthenticated, remote attacker could exploit the vulnerability by convincing a targeted user to view a malicious GIF image file with the affected software. Successful exploitation could allow the attacker to execute arbitrary code on the targeted system.

Mozilla has confirmed the vulnerability and released software updates.
 
Warning Indicators
The following Mozilla products are vulnerable:
  • Firefox versions prior to 17.0
  • Firefox ESR versions prior to 10.0.11
  • Thunderbird versions prior to 17.0
  • Thunderbird ESR versions prior to 10.0.11
  • SeaMonkey versions prior to 2.14
 
IntelliShield Analysis
To exploit the vulnerability, the attacker may provide a GIF file to the user and persuade the user to open or execute the file by using misleading language or instructions.

This vulnerability cannot be exploited through e-mail in Thunderbird and SeaMonkey because the products have scripting disabled; however, the vulnerability could be exploited in the browser-like context of the products.
 
Vendor Announcements
Mozilla has released a security advisory at the following link: MFSA 2012-92

FreeBSD has released a VuXML document at the following link: mozilla -- multiple vulnerabilities

Red Hat has released an official CVE statement and security advisories for bug 877615 at the following links: CVE-2012-4202, RHSA-2012:1482, and RHSA-2012:1483
 
Impact
An unauthenticated, remote attacker could exploit the vulnerability to execute arbitrary code with elevated privileges on the targeted system. Successful attack could also allow the attacker to cause a complete system compromise.
 
Technical Information
The vulnerability exists due to insufficient bounds checks within the image::RasterImage:DrawFrameTo() function while rendering GIF image files.

An unauthenticated, remote attacker could exploit the vulnerability by convincing a targeted user to view a malicious GIF image with the affected software. Successful exploitation could cause a buffer overflow error that may corrupt memory. The attacker could leverage the memory corruption to execute arbitrary code on a targeted system.
 
Safeguards
Administrators are advised to apply the appropriate updates.

Administrators are advised to warn users not to view image files from untrusted sources.

Users are advised not to open e-mail messages from suspicious or unrecognized sources. If users cannot verify that links or attachments included in e-mail messages are safe, they are advised not to open them.

Administrators are advised to monitor affected systems.
 
Patches/Software

Mozilla has released software updates at the following links:

CentOS packages can be updated using the up2date or yum command.

FreeBSD releases ports collection updates at the following link: Ports Collection Index

Red Hat has released updated software for registered subscribers at the following link: Red Hat Network. Red Hat packages can be updated on Red Hat Enterprise Linux versions 5 and later using the yum tool.

 
Alert History
 
Version 1, November 21, 2012, 7:50 AM: Mozilla Firefox, Thunderbird, and SeaMonkey contain a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code on a targeted system. Updates are available.


Product Sets
 
The security vulnerability applies to the following combinations of products.

Primary Products:
Mozilla FoundationFirefox 12.0 Base | 13.0 Base | 14.0 Base | 15.0 Base | 16.0 Base, .1, .2
Mozilla FoundationFirefox ESR 10.0 .1, .2, .3, .4, .5, .6, .7, .8, .9, .10
Mozilla FoundationSeaMonkey 2.0 .0, .1, .2, .3, .4, .5, .6, .7, .8, .9, .10, .11, .12, .13, .14 | 2.1 Base | 2.2 Base | 2.3 Base, .1, .2, .3 | 2.4 Base, .1 | 2.5 Base | 2.6 .1 | 2.7 Base, .1 | 2.8 Base | 2.9 Base, .1 | 2.10 Base | 2.11 Base | 2.12 Base | 2.13 Base, .1
Mozilla FoundationThunderbird 12.0 Base | 13.0 Base | 14.0 Base | 15.0 Base | 16.0 Base, .1
Mozilla FoundationThunderbird ESR 10.0 .1, .2, .3, .4, .5, .6, .7, .8, .9, .10

Associated Products:
CentOS ProjectCentOS 5 .0 i386, .0 x86_64, .1 i386, .1 x86_64, .2 i386, .2 x86_64, .3 i386, .3 x86_64, .4 i386, .4 x86_64, .5 i386, .5 x86_64 | 6 .0 i386, .0 x86_64, .1 i386, .1 x86_64, .2 i386, .2 x86_64
FreeBSD ProjectFreeBSD 6.3 Base | 6.4 Base | 7.0 Base | 7.1 Base | 7.2 Base | 7.3 Base | 7.4 Base | 8.0 Base | 8.1 Base | 8.2 Base | 8.3 Base | 9.0 Base
Red Hat, Inc.Red Hat Enterprise Linux 5 IA-32, IA-64, PPC, ppc64, s390, s390x, x86_64
Red Hat, Inc.Red Hat Enterprise Linux Desktop 5 IA-32, x86_64 | 6 IA-32, x86_64
Red Hat, Inc.Red Hat Enterprise Linux Desktop Workstation 5 IA-32, x86-64
Red Hat, Inc.Red Hat Enterprise Linux HPC Node 6 x86_64
Red Hat, Inc.Red Hat Enterprise Linux Optional Productivity Applications 5 IA-32, x86-64
Red Hat, Inc.Red Hat Enterprise Linux Server 6 IA-32, PPC, PPC 64, s390, s390x, x86_64
Red Hat, Inc.Red Hat Enterprise Linux Workstation 6 IA-32, x86_64




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