medium
4
CWE
295
Advisory Published
Updated

CVE-2013-0776

First published: Tue Feb 19 2013(Updated: )

Mozilla Firefox before 19.0, Firefox ESR 17.x before 17.0.3, Thunderbird before 17.0.3, Thunderbird ESR 17.x before 17.0.3, and SeaMonkey before 2.16 allow man-in-the-middle attackers to spoof the address bar by operating a proxy server that provides a 407 HTTP status code accompanied by web script, as demonstrated by a phishing attack on an HTTPS site.

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

Affected SoftwareAffected VersionHow to fix
Firefox<17.0.3
Firefox<19.0
Mozilla SeaMonkey<2.16
Thunderbird<17.0.3
Mozilla Thunderbird<17.0.3
SUSE Linux=11.4
SUSE Linux=12.1
SUSE Linux=12.2
Red Hat Enterprise Linux=5.9
Red Hat Enterprise Linux Desktop=5.0
Red Hat Enterprise Linux Desktop=6.0
Red Hat Enterprise Linux Server EUS=5.9
Red Hat Enterprise Linux Server EUS=6.3
Red Hat Enterprise Linux Server=5.0
Red Hat Enterprise Linux Server=6.0
Red Hat Enterprise Linux Workstation=5.0
Red Hat Enterprise Linux Workstation=6.0
Debian=7.0
Ubuntu=10.04
Ubuntu=11.10
Ubuntu=12.04
Ubuntu=12.10
Firefox ESR<17.0.3

Remedy

https://bugzilla.mozilla.org/show_bug.cgi?id=796475

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2013-0776?

    CVE-2013-0776 is classified as a moderate severity vulnerability that allows man-in-the-middle attacks.

  • How do I fix CVE-2013-0776?

    To fix CVE-2013-0776, update your Mozilla Firefox, Thunderbird, or SeaMonkey to the latest version that addresses this vulnerability.

  • Which versions are affected by CVE-2013-0776?

    CVE-2013-0776 affects Mozilla Firefox versions prior to 19.0, Firefox ESR versions before 17.0.3, Thunderbird versions before 17.0.3, and SeaMonkey versions before 2.16.

  • What type of attack is enabled by CVE-2013-0776?

    CVE-2013-0776 enables man-in-the-middle attackers to spoof the address bar by modifying HTTP responses.

  • Is there a workaround for CVE-2013-0776 if I can't update immediately?

    There is no official workaround for CVE-2013-0776, so updating to the latest version is strongly recommended.

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