CVE-2015-5894

Severity: medium (CVSS 4.3 v2.0)
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: 2015-10-09 · updated 2026-06-17
Weakness: CWE-17

Description

The X.509 certificate-trust implementation in Apple OS X before 10.11 does not recognize that the kSecRevocationRequirePositiveResponse flag implies a revocation-checking requirement, which makes it easier for man-in-the-middle attackers to spoof endpoints by leveraging access to a revoked certificate.

Affected products

macOS: through 10.10.5

References

http://lists.apple.com/archives/security-announce/2015/Sep/msg00008.html
http://www.securityfocus.com/bid/76908
http://www.securitytracker.com/id/1033703
https://support.apple.com/HT205267
http://lists.apple.com/archives/security-announce/2015/Sep/msg00008.html
http://www.securityfocus.com/bid/76908
http://www.securitytracker.com/id/1033703
https://support.apple.com/HT205267

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