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    CVE-2014-8639

    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.

    Published:Jan 13, 2015
    Last Modified:Apr 12, 2025
    EPS:Jan 14, 2015
    EPSS Score:0.01476
    CVSS Score:6.8

    Affected Products

    Vendor
    Mozilla
    Product
    Firefox
    Vendor
    Mozilla
    Product
    Firefox Esr
    Vendor
    Mozilla
    Product
    Seamonkey
    Vendor
    Mozilla
    Product
    Thunderbird
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-84144 (CVSS 7.5) — Internally found bugs present in Thunderbird 154 and Thunderbird ESR 153.1. Some of these bugs showed evidence…
    CVE-2026-84143 (CVSS 9.8) — Internally found bugs present in Thunderbird 154, Thunderbird ESR 153.1 and Thunderbird ESR 140.14. Some of th…
    CVE-2026-84142 (CVSS 9.8) — Internally found bugs present in Thunderbird 154. Some of these bugs showed evidence of memory corruption or a…
    CVE-2026-84141 (CVSS 9.8) — Integer overflow in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 155, Firefox ESR…
    CVE-2026-84140 (CVSS 9.8) — Site isolation issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ES…
    CVE-2026-84139 (CVSS 6.1) — Clickjacking issue in the DOM: Events component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.…
    CVE-2026-84138 (CVSS 6.5) — Denial-of-service in the PDF Viewer component. This vulnerability was fixed in Firefox 155 and Thunderbird 155…
    CVE-2026-84137 (CVSS 4.3) — Spoofing issue in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 155, Firefox ESR 153…
    CVE-2026-84136 (CVSS 6.1) — Other issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, …
    CVE-2026-84135 (CVSS 9.8) — Other issue in Firefox Focus for Android. This vulnerability was fixed in Firefox 155.…

    References

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

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High