Vulnerability Alert

Multiple Mozilla Products SVG Text Processing Memory Corruption Vulnerability

 
Threat Type:CWE-119: Buffer Errors
IntelliShield ID:27453
Version:1
First Published:2012 November 21 15:14 GMT
Last Published:2012 November 21 20:14 GMT
Port: Not available
CVE:CVE-2012-5836
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Moderate Damage
CVSS Base:6.8 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:5.0
 
Version Summary:Multiple Mozilla products contain a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code on a targeted system. Updates are available.
 
 
Description
Multiple Mozilla products contain a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code on a targeted system.

The vulnerability is due to improper handling of certain web pages by the affected software. An unauthenticated, remote attacker could exploit this vulnerability by convincing a user to open a crafted web page. Processing the web page could cause an error, allowing the attacker to execute arbitrary code on the system.

Mozilla has confirmed this vulnerability and released updated software.
 
Warning Indicators
The following Mozilla products are vulnerable:
  • Firefox versions prior to 17.0
  • Thunderbird versions prior to 17.0
  • SeaMonkey versions prior to 2.14
 
IntelliShield Analysis
To exploit the vulnerability, the attacker may provide a link that directs a user to a malicious site and use misleading language or instructions to persuade the user to follow the provided link.
 
Vendor Announcements
Mozilla has released a security advisory at the following link: MFSA 2012-94

FreeBSD has released a VuXML document at the following link: mozilla -- multiple vulnerabilities
 
Impact
An unauthenticated, remote attacker could exploit this vulnerability to execute arbitrary code on a targeted system with the privileges of the user. If the user holds elevated privileges, the attacker could completely compromise the system.
 
Technical Information
The vulnerability is due to a buffer overflow in the affected software while processing SVG text on a path in Cascading Style Sheet (CSS) properties in web pages.

An unauthenticated, remote attacker could exploit this vulnerability by convincing a user to open a web page that contains malicious SVG text in  CSS. The processing of the web page could cause a buffer overflow, corrupting memory. The attacker could use the memory corruption to execute arbitrary code on the system.
 
Safeguards
Administrators are advised to apply the appropriate updates.

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 updated software at the following links:
 
Alert History
 
Initial Release


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

Primary Products:
Mozilla FoundationFirefox 10.0 Base, .2, .1 | 11.0 Base | 12.0 Base | 13.0 Base | 14.0 Base | 15.0 Base | 16.0 Base, .1, .2
Mozilla FoundationSeaMonkey 2.10 Base | 2.11 Base | 2.12 Base
Mozilla FoundationThunderbird 10.0 Base, .1, .2 | 11.0 Base | 12.0 Base | 13.0 Base | 14.0 Base | 15.0 Base | 16.0 Base, .1

Associated Products:
FreeBSD ProjectFreeBSD 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




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