CVE-2013-0776

Name: CVE-2013-0776
Creator: NVD / NIST
Published: 2013-02-19T23:55:01.55+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.30%

Last modified Jun 16, 2026

CVE-2013-0776 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 1.30% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability

1.30%

66.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-295

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 17.0.3
Mozilla	Firefox	< 19.0
Mozilla	Seamonkey	< 2.16
Mozilla	Thunderbird	< 17.0.3
Mozilla	Thunderbird Esr	< 17.0.3
Opensuse	Opensuse	11.4
Opensuse	Opensuse	12.1
Opensuse	Opensuse	12.2
Redhat	Enterprise Linux Aus	5.9
Redhat	Enterprise Linux Desktop	5.0
Redhat	Enterprise Linux Desktop	6.0
Redhat	Enterprise Linux Eus	5.9
Redhat	Enterprise Linux Eus	6.3
Redhat	Enterprise Linux Server	5.0
Redhat	Enterprise Linux Server	6.0
Redhat	Enterprise Linux Workstation	5.0
Redhat	Enterprise Linux Workstation	6.0
Debian	Debian Linux	7.0
Canonical	Ubuntu Linux	10.04
Canonical	Ubuntu Linux	11.10
Canonical	Ubuntu Linux	12.04
Canonical	Ubuntu Linux	12.10

References

http://lists.opensuse.org/opensuse-security-announce/2013-02/msg00017.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-updates/2013-02/msg00062.htmlMailing List, Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2013-0271.htmlThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2013-0272.htmlThird Party Advisory
http://www.debian.org/security/2013/dsa-2699Third Party Advisory
http://www.mozilla.org/security/announce/2013/mfsa2013-27.htmlVendor Advisory
http://www.ubuntu.com/usn/USN-1729-1Third Party Advisory
http://www.ubuntu.com/usn/USN-1729-2Third Party Advisory
http://www.ubuntu.com/usn/USN-1748-1Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=796475Issue Tracking, Patch, Vendor Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16666Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2013-02/msg00017.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-updates/2013-02/msg00062.htmlMailing List, Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2013-0271.htmlThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2013-0272.htmlThird Party Advisory
http://www.debian.org/security/2013/dsa-2699Third Party Advisory
http://www.mozilla.org/security/announce/2013/mfsa2013-27.htmlVendor Advisory
http://www.ubuntu.com/usn/USN-1729-1Third Party Advisory
http://www.ubuntu.com/usn/USN-1729-2Third Party Advisory
http://www.ubuntu.com/usn/USN-1748-1Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=796475Issue Tracking, Patch, Vendor Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16666Third Party Advisory

Timeline

Published: Feb 19, 2013
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2013-0776?

How severe is CVE-2013-0776?

Severity scoring for CVE-2013-0776 is pending analysis. The EPSS model estimates a 1.30% probability of exploitation in the next 30 days.

How do I fix CVE-2013-0776?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2013-0776?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST