Red Hat has released an additional security advisory and updated packages to address the multiple Mozilla products HTML editor use-after-free vulnerability.
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.
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
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.
Mozilla has released a security advisory at the following link: MFSA 2013-29
An unauthenticated, remote attacker could exploit this vulnerability to execute arbitrary code in the security context of the affected application.
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.
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 updated versions at the following links:
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.
Version 2, March 11, 2013, 3:02 PM: 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.
Version 1, March 9, 2013, 10:41 PM: Multiple Mozilla products contain a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code. Updates are available.
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