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.
Indicators of Compromise
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
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.
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.
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.
Mozilla has released a security advisory at the following link: MFSA 2012-92
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.
CentOS has released updated packages to address the Mozilla Firefox, Thunderbird, and SeaMonkey GIF image processing buffer overflow arbitrary code execution vulnerability.
2012-December-10 18:42 GMT
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.
Red Hat Enterprise Linux Optional Productivity Applications
5 (IA-32, x86-64)
Red Hat Enterprise Linux Server
6 (IA-32, PPC, PPC 64, s390, s390x, x86_64)
Red Hat Enterprise Linux Workstation
6 (IA-32, x86_64)
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM
THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.
A standalone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy and may lack important information or contain factual errors. The information in this document is intended for end users of Cisco products
Cisco Multivendor Vulnerability Alerts respond to vulnerabilities identified in third-party vendors' products. These alerts contain information compiled from diverse sources and provide comprehensive technical descriptions, objective analytical assessments, workarounds and practical safeguards, and links to vendor advisories and patches.