CVE-2011-0199

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: none known
Published: 2011-06-24 · updated 2026-06-16
Weakness: CWE-295

Description

The Certificate Trust Policy component in Apple Mac OS X before 10.6.8 does not perform CRL checking for Extended Validation (EV) certificates that lack OCSP URLs, which might allow man-in-the-middle attackers to spoof an SSL server via a revoked certificate.

Affected products

macOS: from 10.6.0 before 10.6.8 — fixed in 10.6.8
Apple Mac Os X Server: from 10.6.0 before 10.6.8 — fixed in 10.6.8

How to fix

Upgrade to a fixed version: macOS 10.6.8; Apple Mac Os X Server 10.6.8. Check the vendor advisory for mitigations.

References

http://lists.apple.com/archives/security-announce/2011//Jun/msg00000.html
http://support.apple.com/kb/HT4723
http://www.securityfocus.com/bid/48447
http://lists.apple.com/archives/security-announce/2011//Jun/msg00000.html
http://support.apple.com/kb/HT4723
http://www.securityfocus.com/bid/48447

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