CVE-2014-8639

Description

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.

6.8

CVSS

Severity: Medium

CVSS 2.0 •

EPSS 1.48% Top 25%

Vendor Advisory redhat.com Vendor Advisory ubuntu.com Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory debian.org Vendor Advisory gentoo.org Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory debian.org Vendor Advisory opensuse.org Vendor Advisory mozilla.org

Affected: n/a n/a

References

Link	Tags
http://rhn.redhat.com/errata/RHSA-2015-0046.html	vendor advisory
http://secunia.com/advisories/62242	third party advisory
http://www.securitytracker.com/id/1031533	vdb entry
http://www.ubuntu.com/usn/USN-2460-1	vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00002.html	vendor advisory
http://secunia.com/advisories/62304	third party advisory
http://linux.oracle.com/errata/ELSA-2015-0047.html
http://secunia.com/advisories/62259	third party advisory
http://secunia.com/advisories/62250	third party advisory
http://lists.opensuse.org/opensuse-security-announce/2015-01/msg00033.html	vendor advisory
http://secunia.com/advisories/62237	third party advisory
http://lists.opensuse.org/opensuse-security-announce/2015-01/msg00014.html	vendor advisory
http://secunia.com/advisories/62418	third party advisory
http://lists.opensuse.org/opensuse-security-announce/2015-01/msg00032.html	vendor advisory
http://secunia.com/advisories/62316	third party advisory
http://www.debian.org/security/2015/dsa-3132	vendor advisory
http://secunia.com/advisories/62274	third party advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/99959	vdb entry
https://security.gentoo.org/glsa/201504-01	vendor advisory
http://secunia.com/advisories/62313	third party advisory
http://rhn.redhat.com/errata/RHSA-2015-0047.html	vendor advisory
http://secunia.com/advisories/62790	third party advisory
http://secunia.com/advisories/62293	third party advisory
http://secunia.com/advisories/62283	third party advisory
http://secunia.com/advisories/62446	third party advisory
http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html
http://secunia.com/advisories/62657	third party advisory
http://secunia.com/advisories/62273	third party advisory
http://www.mozilla.org/security/announce/2014/mfsa2015-04.html	vendor advisory
http://lists.opensuse.org/opensuse-updates/2015-01/msg00071.html	vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00031.html	vendor advisory
http://www.debian.org/security/2015/dsa-3127	vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2015-01/msg00036.html	vendor advisory
http://secunia.com/advisories/62315	third party advisory
http://linux.oracle.com/errata/ELSA-2015-0046.html
http://secunia.com/advisories/62253	third party advisory
http://www.securitytracker.com/id/1031534	vdb entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1095859
http://www.securityfocus.com/bid/72046	vdb entry

Frequently Asked Questions

What is the severity of CVE-2014-8639?: CVE-2014-8639 has been scored as a medium severity vulnerability.
How to fix CVE-2014-8639?: To fix CVE-2014-8639, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2014-8639 being actively exploited in the wild?: It is possible that CVE-2014-8639 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.