Download Firefox 3.5.1 Update Free and Fix a Critical Vulnerability

Date Published: July 18, 2009


A few days ago, Mozilla announced the free Firefox 3.5.1 update. The free download is available via Firefox itself (under HELP -> Check for Updates submenu) or the Mozilla Firefox website. This update addresses a critical vulnerability found in Firefox 3.5 – the MFSA 2009-41 described as “Corrupt JIT state after deep return from native function”.

Free Firefox 3.5.1 Download Page

Free Firefox 3.5.1 Download Page

As per documentation, Firefox 3.5.1 has fixed “a crash that we determined could result in an exploitable memory corruption problem. In certain cases after a return from a native function, such as escape(), the Just-in-Time (JIT) compiler could get into a corrupt state. This could be exploited by an attacker to run arbitrary code such as installing malware.

The above-stated claim is true as we can personally attest to the security hole in Firefox 3.5 (and perhaps in previous versions of MFF which has only received attention in the new Mozilla Firefox 3.5.1) strengthening the results of one study that Firefox is the Most Vulnerable Software of 2008. See previous post on this subject.

Further, the Firefox 3.5.1 file size is 7.7MB (see screnshot above) and will take about 5 minutes to download at 33.6Kbps/sec DL speed.

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Comments

3 Comments/Reviews on “Download Firefox 3.5.1 Update Free and Fix a Critical Vulnerability”

  1. Home Computer Protection: Download Free Norton Antivirus 2010 | Internet Security on July 18th, 2009 6:23 pm

    [...] Download Firefox 3.5.1 Update Free and Fix a Critical Vulnerability [...]

  2. sunit on July 28th, 2009 10:05 am

    Firefox is the faster secure web browser it is also use in dial up connection thank up for making Firefox With free downloading

  3. Unusual Behavior of Firefox 3.5.1 When Handling Javascripts | Review of Internet Technology on July 28th, 2011 3:16 pm

    [...] updating to Firefox 3.5.1, we have observed some rather unusual and annoying behavior of Mozilla Firefox. The 3.5.1 version [...]

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