Oracle has released security advisories and patches to address the Mozilla Firefox, Thunderbird, and SeaMonkey CSP headers processing cross-site scripting vulnerability.
Description
Mozilla Firefox, Thunderbird, and SeaMonkey contain a vulnerability that could allow an unauthenticated, remote attacker to conduct cross-site scripting attacks.
The vulnerability exists because the affected software fails to perform sufficient sanitization on user-supplied input. An unauthenticated, remote attacker could exploit this vulnerability by persuading a user to visit a malicious web page. Successful exploitation could allow the attacker to execute arbitrary script code in the user's browser session.
Mozilla has confirmed this vulnerability and released updated software.
Warning Indicators
The following Mozilla products are vulnerable:
Firefox versions prior to 11.0 and ESR 10.0.3
Thunderbird versions prior to 11.0 and ESR 10.0.3
SeaMonkey versions prior to 2.8
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-2012-15
An unauthenticated, remote attacker could exploit this vulnerability to execute arbitrary HTML code within the security context of the affected software. A successful exploit could allow the attacker to steal sensitive, cookie-based information, including authentication credentials or recently submitted data.
Technical Information
The vulnerability is due to insufficient sanitization performed on user-supplied input received through Content Security Policy (CSP) headers. The vulnerable code incorrectly parses the CRLF character sequences that are encountered while processing the CSP headers, resulting in an additive effect policy rule that makes the affected software vulnerable to further injection attacks.
An unauthenticated, remote attacker could exploit this vulnerability by persuading a user to visit a malicious web page. Successful exploitation could allow the attacker to execute arbitrary scripts in the user's browser session.
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:
Oracle has released patches for registered users at the following link: Solaris 11 11/11 SRU 8.5
Red Hat packages can be updated using the up2date or yum command.
Alert History
Version 2, March 19, 2012, 1:19 PM: FreeBSD has released a VuXML document and updated ports collection to address the Mozilla Firefox, Thunderbird, and SeaMonkey CSP headers processing cross-site scripting vulnerability. CentOS has also released updated packages to address this vulnerability.
Version 1, March 14, 2012, 5:25 PM: Mozilla Firefox, Thunderbird, and SeaMonkey contain a vulnerability that could allow an unauthenticated, remote attacker to conduct cross-site scripting attacks. Updates are available.
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 | 9.0 Base
Oracle Corporation
Solaris Express
11 2010.11
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 App
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 Server AUS
6.2 IA-32, x86_64
Red Hat, Inc.
Red Hat Enterprise Linux Server EUS
6.2.z IA-32, PPC, PPC64, s390, s390x, x86_64
Red Hat, Inc.
Red Hat Enterprise Linux Workstation
6 IA-32, x86_64
Alerts and bulletins on the Cisco Security Intelligence Operations Portal are highlighted by analysts in the
Cisco Threat Operations Center and represent a subset of the comprehensive content that is available through Cisco Security IntelliShield Alert Manager Service.
This customizable threat and vulnerability alert service provides security staff with access to timely, accurate, and credible information about threats and vulnerabilities that may affect their environment. Cisco is pleased to offer a free trial of the service.
To register for full access, please visit the IntelliShield trial registration page.
LEGAL DISCLAIMER The urgency and severity ratings of this alert are not tailored to individual users; users may value alerts differently based upon their network configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.
