CVE-2012-5821

Severity: medium (CVSS 5.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2012-11-04 · updated 2026-06-16
Weakness: CWE-295

Description

Lynx does not verify that the server's certificate is signed by a trusted certification authority, which allows man-in-the-middle attackers to spoof SSL servers via a crafted certificate, related to improper use of a certain GnuTLS function.

Affected products

Canonical Ubuntu Linux: 10.04, 11.10, 12.04, 12.10
Lynx: all versions

References

http://www.cs.utexas.edu/~shmat/shmat_ccs12.pdf
http://www.mandriva.com/security/advisories?name=MDVSA-2013:101
http://www.ubuntu.com/usn/USN-1642-1
https://exchange.xforce.ibmcloud.com/vulnerabilities/79930
https://wiki.mageia.org/en/Support/Advisories/MGASA-2012-0351
http://www.cs.utexas.edu/~shmat/shmat_ccs12.pdf
http://www.mandriva.com/security/advisories?name=MDVSA-2013:101
http://www.ubuntu.com/usn/USN-1642-1
https://exchange.xforce.ibmcloud.com/vulnerabilities/79930
https://wiki.mageia.org/en/Support/Advisories/MGASA-2012-0351

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