Mozilla Firefox version 3.5 contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code.
Proof-of-concept code to exploit the vulnerability is publicly available.
Mozilla has confirmed the vulnerability and released updated software.
Mozilla Firefox version 3.5 is vulnerable.
Limited information is available to describe this vulnerability. To exploit the vulnerability, an attacker must convince a user to visit a malicious web page. The attacker will likely employ social engineering to exploit the vulnerability, such as supplying links to the website in an e-mail message or another form of messaging.
An exploit could allow an unauthenticated, remote attacker to execute arbitrary code with the privileges of the user running Mozilla Firefox. If the user holds Administrator privileges, an exploit could result in complete system compromise.
Mozilla has released a security advisory at the following link: MFSA 2009-41
US-CERT has released a vulnerability note at the following link: VU#443060
An unauthenticated, remote attacker could exploit this vulnerability to execute arbitrary code with the privileges of the user. If the user holds elevated privileges, the attacker could execute code that results in a complete system compromise.
The vulnerability exists when the application returns from a native function such as escape(). Upon this return, the JIT compiler could fall into a corrupt state.
An unauthenticated, remote attacker could exploit this vulnerability to execute arbitrary code with user privileges.
Administrators are advised to apply the appropriate updates.
Users are advised not to follow unsolicited links. Users should verify the authenticity of unexpected links prior to following them.
Users are advised not to open e-mail messages from untrusted sources.
Administrators are advised to monitor affected systems.
Version 1, July 14, 2009, 11:29 AM: Mozilla Firefox contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code. Updates are unavailable.
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