{"id":"CVE-2015-6997","aliases":["EUVD-2015-6929","GHSA-6522-r5wp-vr5j"],"status":"published","title":"The X.509 certificate-trust implementation in Apple iOS before 9.1 does not recognize that the...","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.","severity":{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00903,"percentile":0.60031,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-254"],"published":"2015-10-23T10:00:00Z","modified":"2026-06-17T00:31:44Z","products":[{"vendor":"apple","product":"iphone_os"},{"vendor":"apple","product":"watchos"}],"references":[{"url":"http://lists.apple.com/archives/security-announce/2015/Oct/msg00002.html","tags":["vendor-advisory","x_refsource_APPLE","x_transferred","Vendor Advisory"]},{"url":"http://lists.apple.com/archives/security-announce/2015/Dec/msg00002.html","tags":["vendor-advisory","x_refsource_APPLE","x_transferred","Vendor Advisory"]},{"url":"https://support.apple.com/HT205370","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://support.apple.com/HT205641","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"http://www.securitytracker.com/id/1033929","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred"]},{"url":"http://www.securityfocus.com/bid/77268","tags":["vdb-entry","x_refsource_BID","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2015-6997"},{"url":"https://github.com/advisories/GHSA-6522-r5wp-vr5j"}],"sources":{"cve":[{"id":"CVE-2015-6997","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.","status":"published","published":"2015-10-23T10:00:00Z","modified":"2024-08-06T07:36:35.247Z","updated_at":"2026-11-02T14:35:42.680858Z"}],"euvd":[{"id":"EUVD-2015-6929","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.","status":"published","published":"2015-10-23T10:00:00Z","modified":"2024-08-06T07:36:35Z","updated_at":"2026-11-03T02:21:54.34629Z"}],"ghsa":[{"id":"GHSA-6522-r5wp-vr5j","title":"The X.509 certificate-trust implementation in Apple iOS before 9.1 does not recognize that the...","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.","status":"published","published":"2022-05-17T03:15:41Z","modified":"2023-01-27T05:06:35Z","updated_at":"2026-11-02T14:42:56.687968Z"}],"nvd":[{"id":"CVE-2015-6997","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.","status":"published","published":"2015-10-23T10:59:07.32Z","modified":"2026-06-17T00:31:44.023Z","cvss":[{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-254"],"updated_at":"2026-11-02T14:03:12.30866Z"}]}}