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Vulnerability record · CVE-2014-1266 · published 22 February 2014

CVE-2014-1266: Apple iphone os improper certificate validation vulnerability

Apple · Iphone Os

The SSLVerifySignedServerKeyExchange function in libsecurity_ssl/lib/sslKeyExchange.c in the Secure Transport feature in the Data Security component in Apple iOS 6.x before 6.1.6 and 7.x before 7.0.6, Apple TV 6.x before 6.0.2, and Apple OS X 10.9.x before 10.9.2 does not check the signature in a TLS Server Key Exchange message, which allows man-in-the-middle attackers to spoof SSL servers by (1) using an arbitrary private key for the signing step or (2) omitting the signing step.

7.4 CVSS 3.1 High EPSS 5.7% · top 7.2% CWE-295 · Improper certificate validation
7.4CVSS 3.1 base score, v2 5.8
5.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
18References, 8 tagged exploit
17 Jun 2026Last modified by NVD

Description

The SSLVerifySignedServerKeyExchange function in libsecurity_ssl/lib/sslKeyExchange.c in the Secure Transport feature in the Data Security component in Apple iOS 6.x before 6.1.6 and 7.x before 7.0.6, Apple TV 6.x before 6.0.2, and Apple OS X 10.9.x before 10.9.2 does not check the signature in a TLS Server Key Exchange message, which allows man-in-the-middle attackers to spoof SSL servers by (1) using an arbitrary private key for the signing step or (2) omitting the signing step.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://it.slashdot.org/comments.pl?sid=4821073&cid=46310187 Issue Tracking
http://support.apple.com/kb/HT6146 Vendor Advisory
http://support.apple.com/kb/HT6147 Vendor Advisory
http://support.apple.com/kb/HT6148 Vendor Advisory
http://support.apple.com/kb/HT6150 Vendor Advisory
https://news.ycombinator.com/item?id=7281378 ExploitIssue Tracking
https://www.cs.columbia.edu/~smb/blog/2014-02/2014-02-23.html Exploit
https://www.cs.columbia.edu/~smb/blog/2014-02/2014-02-24.html Exploit
https://www.imperialviolet.org/2014/02/22/applebug.html Exploit
http://it.slashdot.org/comments.pl?sid=4821073&cid=46310187 Issue Tracking
http://support.apple.com/kb/HT6146 Vendor Advisory
http://support.apple.com/kb/HT6147 Vendor Advisory
http://support.apple.com/kb/HT6148 Vendor Advisory
http://support.apple.com/kb/HT6150 Vendor Advisory
https://news.ycombinator.com/item?id=7281378 ExploitIssue Tracking
https://www.cs.columbia.edu/~smb/blog/2014-02/2014-02-23.html Exploit
https://www.cs.columbia.edu/~smb/blog/2014-02/2014-02-24.html Exploit
https://www.imperialviolet.org/2014/02/22/applebug.html Exploit

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2014-1266), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.