VULNERABILITY INTELLIGENCE

CVE-2015-6997

CVSS score4.3 MEDIUM
EPSS probability0.90%
CISA KEVNot currently listed
Published2015-10-23
Last modified2026-06-17
CVSS vectorAV:N/AC:M/Au:N/C:N/I:P/A:N

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.

Primary references