{"id":"CVE-2011-3253","aliases":["EUVD-2011-3217","GHSA-frpq-wjg3-5rp5"],"status":"published","title":"CalDAV in Apple iOS before 5 does not validate X.509 certificates for SSL sessions, which allows...","description":"CalDAV in Apple iOS before 5 does not validate X.509 certificates for SSL sessions, which allows man-in-the-middle attackers to spoof calendar servers and obtain sensitive information via an arbitrary certificate.","severity":{"version":"2.0","score":2.6,"vector":"AV:N/AC:H/Au:N/C:P/I:N/A:N","level":"low","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.00566,"percentile":0.47238,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-200"],"published":"2011-10-14T10:00:00Z","modified":"2026-06-16T23:32:58Z","products":[{"vendor":"apple","product":"iphone_os"}],"references":[{"url":"http://lists.apple.com/archives/Security-announce/2011//Oct/msg00001.html","tags":["vendor-advisory","x_refsource_APPLE","x_transferred","Vendor Advisory"]},{"url":"http://support.apple.com/kb/HT4999","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-3253"},{"url":"https://github.com/advisories/GHSA-frpq-wjg3-5rp5"}],"sources":{"cve":[{"id":"CVE-2011-3253","description":"CalDAV in Apple iOS before 5 does not validate X.509 certificates for SSL sessions, which allows man-in-the-middle attackers to spoof calendar servers and obtain sensitive information via an arbitrary certificate.","status":"published","published":"2011-10-14T10:00:00Z","modified":"2024-09-16T20:07:09.121Z","updated_at":"2026-11-02T14:35:37.324501Z"}],"euvd":[{"id":"EUVD-2011-3217","description":"CalDAV in Apple iOS before 5 does not validate X.509 certificates for SSL sessions, which allows man-in-the-middle attackers to spoof calendar servers and obtain sensitive information via an arbitrary certificate.","status":"published","published":"2011-10-14T10:00:00Z","modified":"2024-09-16T20:07:09Z","updated_at":"2026-11-03T00:55:16.813871Z"}],"ghsa":[{"id":"GHSA-frpq-wjg3-5rp5","title":"CalDAV in Apple iOS before 5 does not validate X.509 certificates for SSL sessions, which allows...","description":"CalDAV in Apple iOS before 5 does not validate X.509 certificates for SSL sessions, which allows man-in-the-middle attackers to spoof calendar servers and obtain sensitive information via an arbitrary certificate.","status":"published","published":"2022-05-17T05:37:44Z","modified":"2023-01-28T05:04:17Z","cwes":["CWE-200"],"updated_at":"2026-11-02T14:44:08.629318Z"}],"nvd":[{"id":"CVE-2011-3253","description":"CalDAV in Apple iOS before 5 does not validate X.509 certificates for SSL sessions, which allows man-in-the-middle attackers to spoof calendar servers and obtain sensitive information via an arbitrary certificate.","status":"published","published":"2011-10-14T10:55:09.887Z","modified":"2026-06-16T23:32:58.263Z","cvss":[{"version":"2.0","score":2.6,"vector":"AV:N/AC:H/Au:N/C:P/I:N/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:02:10.769216Z"}]}}