CVE-2011-3427

The Data Security component in Apple iOS before 5 and Apple TV before 4.4 does not properly restrict use of the MD5 hash algorithm within X.509 certificates, which makes it easier for man-in-the-middle attackers to spoof servers or obtain sensitive information via a crafted certificate.

• CWE-200

• http://lists.apple.com/archives/Security-announce/2011//Oct/msg00001.htmlVendor Advisory
• http://lists.apple.com/archives/Security-announce/2011//Oct/msg00002.htmlVendor Advisory
• http://lists.apple.com/archives/security-announce/2013/Oct/msg00004.html
• http://osvdb.org/76326
• http://support.apple.com/kb/HT4999Vendor Advisory
• http://support.apple.com/kb/HT5001Vendor Advisory
• https://exchange.xforce.ibmcloud.com/vulnerabilities/70547
• http://lists.apple.com/archives/Security-announce/2011//Oct/msg00001.htmlVendor Advisory
• http://lists.apple.com/archives/Security-announce/2011//Oct/msg00002.htmlVendor Advisory
• http://lists.apple.com/archives/security-announce/2013/Oct/msg00004.html
• http://osvdb.org/76326
• http://support.apple.com/kb/HT4999Vendor Advisory
• http://support.apple.com/kb/HT5001Vendor Advisory
• https://exchange.xforce.ibmcloud.com/vulnerabilities/70547

Published

Oct 14, 2011

Last Modified

Jun 16, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2011-3420Multiple unspecified vulnerabilities in Google Chrome before…
• CVE-2011-3421Multiple unspecified vulnerabilities in Google Chrome before…
• CVE-2011-3422The Keychain implementation in Apple Mac OS X 10.6.8 and ear…
• CVE-2011-3423Cross-site scripting (XSS) vulnerability in the Managed File…
• CVE-2011-3424Session fixation vulnerability in the Managed File Transfer …
• CVE-2011-3426Cross-site scripting (XSS) vulnerability in Safari in Apple …
• CVE-2011-3428Buffer overflow in QuickTime before 7.7.1 for Windows allows…
• CVE-2011-3429The Settings component in Apple iOS before 5 stores a cleart…
• CVE-2011-3430The Settings component in Apple iOS before 5, when a configu…
• CVE-2011-3431The Home screen component in Apple iOS before 5 does not pro…
• CVE-2011-3432The UIKit Alerts component in Apple iOS before 5 allows remo…
• CVE-2011-3433Rejected reason: This candidate is unused by its CNA.