What’s Vulnerable › Vulnerabilities

CVE-2015-6997

• 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: 2015-10-23 · updated 2026-06-17
• Weakness: CWE-254

Description

The X.509 certificate-trust implementation in Apple iOS before 9.1 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

• Apple Iphone Os: through 9.0.2
• Apple watchOS: through 2.0

References

• http://lists.apple.com/archives/security-announce/2015/Dec/msg00002.html
• http://lists.apple.com/archives/security-announce/2015/Oct/msg00002.html
• http://www.securityfocus.com/bid/77268
• http://www.securitytracker.com/id/1033929
• https://support.apple.com/HT205370
• https://support.apple.com/HT205641
• http://lists.apple.com/archives/security-announce/2015/Dec/msg00002.html
• http://lists.apple.com/archives/security-announce/2015/Oct/msg00002.html
• http://www.securityfocus.com/bid/77268
• http://www.securitytracker.com/id/1033929
• https://support.apple.com/HT205370
• https://support.apple.com/HT205641

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