CVE-2011-3422

Severity: medium (CVSS 4.3 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2011-09-12 · updated 2026-06-16
Weakness: CWE-20

Description

The Keychain implementation in Apple Mac OS X 10.6.8 and earlier does not properly handle an untrusted attribute of a Certification Authority certificate, which makes it easier for man-in-the-middle attackers to spoof arbitrary SSL servers via an Extended Validation certificate, as demonstrated by https access with Safari.

Affected products

macOS: through 10.6.8; 10.6.0, 10.6.1, 10.6.2, 10.6.3, 10.6.4, 10.6.5 (+2)
Apple Mac Os X Server: through 10.6.8; 10.6.0, 10.6.1, 10.6.2, 10.6.3, 10.6.4, 10.6.5 (+2)

References

http://lists.apple.com/archives/security-announce/2012/Feb/msg00000.html
http://support.apple.com/kb/HT5130
http://www.computerworld.com/s/article/9219669/Mac_OS_X_can_t_properly_revoke_dodgy_digital_certificates
http://www.securityfocus.com/bid/49429
http://www.securitytracker.com/id?1026002
https://exchange.xforce.ibmcloud.com/vulnerabilities/69556
http://lists.apple.com/archives/security-announce/2012/Feb/msg00000.html
http://support.apple.com/kb/HT5130
http://www.computerworld.com/s/article/9219669/Mac_OS_X_can_t_properly_revoke_dodgy_digital_certificates
http://www.securityfocus.com/bid/49429
http://www.securitytracker.com/id?1026002
https://exchange.xforce.ibmcloud.com/vulnerabilities/69556

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