Public Date:
877633: CVE-2012-4210 Mozilla: CSS and HTML injection through Style Inspector (MFSA 2012-104)

The MITRE CVE dictionary describes this issue as:

The Style Inspector in Mozilla Firefox before 17.0 and Firefox ESR 10.x before 10.0.11 does not properly restrict the context of HTML markup and Cascading Style Sheets (CSS) token sequences, which allows user-assisted remote attackers to execute arbitrary JavaScript code with chrome privileges via a crafted stylesheet.

Find out more about CVE-2012-4210 from the MITRE CVE dictionary dictionary and NIST NVD.

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

Base Score 6.8
Base Metrics AV:N/AC:M/Au:N/C:P/I:P/A:P
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux version 5 (firefox) RHSA-2012:1482 2012-11-20
Red Hat Enterprise Linux version 6 (firefox) RHSA-2012:1482 2012-11-20

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 6 thunderbird Not affected
Red Hat Enterprise Linux 5 thunderbird Not affected
Red Hat Enterprise Linux version 5 xulrunner 10.0.11-1.el5_8 Fixed
Red Hat Enterprise Linux version 6 xulrunner 10.0.11-1.el6_3 Fixed


Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Mariusz Mlynski as the original reporter.

External References