CVE-2013-0776: canonical ubuntu_linux Improper Certificate Validation
Vulnerability summary
CVE-2013-0776 is a medium (CVSS 4.0) Improper Certificate Validation vulnerability in canonical ubuntu_linux. EPSS estimates a 1.30% chance of exploitation in the next 30 days, higher than 70% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 6 · Related 3Timeline
- 19-02-2013PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
1 score · 1 source · 1 versionEPSS trend
Probability
1.30%
Chance of exploitation in the next 30 days
Percentile
70%
Versus all other CVEs
30-day change
0.00 pp
From 1.30% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Redhat5 products
- enterprise_linux_aus5.9
- enterprise_linux_desktop5.0 | 6.0
- enterprise_linux_eus5.9 | 6.3
- enterprise_linux_server5.0 | 6.0
- enterprise_linux_workstation5.0 | 6.0
Mozilla4 products
- firefox< 17.0.3 | < 19.0
- seamonkey< 2.16
- thunderbird< 17.0.3
- thunderbird_esr< 17.0.3
Canonical1 product
- ubuntu_linuxEOL10.04 | 11.10 | 12.04 | 12.10
Debian1 product
- debian_linuxEOL7.0
Opensuse1 product
- opensuseEOL11.4 | 12.1 | 12.2
5 vendors · 12 products
References
11 links
- lists.opensuse.org/opensuse-updates/2013-02/msg00062.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16666VDB EntrySignatureX Refsource OVALThird Party Advisory
Show all 11 references
- lists.opensuse.org/opensuse-security-announce/2013-02/msg00017.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory