medium
6.8
Advisory Published
Updated

CVE-2014-8639

First published: Wed Jan 14 2015(Updated: )

Mozilla Firefox before 35.0, Firefox ESR 31.x before 31.4, Thunderbird before 31.4, and SeaMonkey before 2.32 do not properly interpret Set-Cookie headers within responses that have a 407 (aka Proxy Authentication Required) status code, which allows remote HTTP proxy servers to conduct session fixation attacks by providing a cookie name that corresponds to the session cookie of the origin server.

Credit: security@mozilla.org security@mozilla.org

Affected SoftwareAffected VersionHow to fix
Mozilla SeaMonkey<=2.31
Firefox<=34.0.5
Firefox=31.0
Firefox=31.1.0
Firefox=31.1.1
Firefox=31.3.0
Firefox ESR=31.2
Thunderbird<=31.3.0
Firefox ESR=31.0
Firefox ESR=31.1.0
Firefox ESR=31.1.1
Firefox ESR=31.3.0

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2014-8639?

    CVE-2014-8639 has been classified as a moderate severity vulnerability that can enable session fixation attacks.

  • How do I fix CVE-2014-8639?

    To fix CVE-2014-8639, users should upgrade to Mozilla Firefox version 35.0, Firefox ESR 31.4, Thunderbird 31.4, or SeaMonkey 2.32 or later.

  • What systems are affected by CVE-2014-8639?

    CVE-2014-8639 affects Mozilla Firefox prior to 35.0, Firefox ESR 31.x prior to 31.4, Thunderbird prior to 31.4, and SeaMonkey prior to 2.32.

  • What type of attack can exploit CVE-2014-8639?

    CVE-2014-8639 can be exploited to conduct session fixation attacks through improper handling of Set-Cookie headers.

  • Is CVE-2014-8639 limited to specific operating systems?

    CVE-2014-8639 is not limited to specific operating systems but impacts the software versions listed regardless of the OS.

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