Multiple Mozilla products contain a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code.
The vulnerability exists because the affected software does not perform sufficient sanitization on user-supplied input. An unauthenticated, remote attacker could exploit the vulnerability by convincing the targeted user to visit a malicious website that contains malicious HTML content. Processing the malicious content could cause a use-after-free condition within the HTML editor. Successful exploitation could allow an attacker the ability to execute arbitrary code in the security context of the affected application.
Mozilla has confirmed this vulnerability and released updated software.
Indicators of Compromise
The following Mozilla products are vulnerable:
Firefox versions prior to 19.0.2
Firefox ESR versions prior to 17.0.4
Thunderbird versions prior to 17.0.4
Thunderbird ESR versions prior to 17.0.4
SeaMonkey versions prior to 2.16.1
The vulnerability is due to an error by the document.execCommand() function while performing internal editor operations. As a result, a use-after-free condition could occur within the HTML editor, which could allow arbitrary code execution.
An unauthenticated, remote attacker could exploit the vulnerability by convincing the targeted user to visit a malicious website that contains malicious HTML content. Processing the malicious content could cause a use-after-free condition within the HTML editor. Successful exploitation could allow an attacker the ability to execute arbitrary code in the security context of the affected application.
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.
At the time this alert was first published, updated software versions of SeaMonkey and Thunderbird were unavailable on the vendor's website.
Administrators are advised to apply the appropriate updates.
Users should verify that unsolicited links are safe to follow.
Users are advised not to visit websites or follow links that have suspicious characteristics or cannot be verified as safe.
Administrators are advised to monitor affected systems.
Mozilla has released a security advisory at the following link: MFSA 2013-29
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.
Red Hat has released an additional security advisory and updated packages to address the multiple Mozilla products HTML editor use-after-free vulnerability.
2013-March-12 19:19 GMT
FreeBSD has released a VuXML document and updated ports collection to address the Mozilla HTML editor use-after-free vulnerability. CentOS has also released updated packages to address this vulnerability.
2013-March-11 23:02 GMT
Multiple Mozilla products contain a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code. Updates are available.
Red Hat Enterprise Linux EUS (Extended Update Support)
5.9.z (IA-32, IA-64, PPC, PPC-64, s390x, x86_64)
Red Hat Enterprise Linux HPC Node
Red Hat Enterprise Linux Long Life
5.9 (IA-32, IA-64, x86_64)
Red Hat Enterprise Linux Optional Productivity Applications
5 (IA-32, x86-64)
Red Hat Enterprise Linux Optional Productivity Applications EUS
5.9.z (IA-32, x86_64)
Red Hat Enterprise Linux Server
6 (IA-32, PPC, PPC 64, s390, s390x, x86_64)
Red Hat Enterprise Linux Server EUS
6.4.z (IA-32, x86_64, PPC, PPC64, s390, s390X)
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.