What’s Vulnerable › Vulnerabilities

CVE-2016-9244

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 74.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2017-02-09 · updated 2026-06-17
• Weakness: CWE-200

Description

A BIG-IP virtual server configured with a Client SSL profile that has the non-default Session Tickets option enabled may leak up to 31 bytes of uninitialized memory. A remote attacker may exploit this vulnerability to obtain Secure Sockets Layer (SSL) session IDs from other sessions. It is possible that other data from uninitialized memory may be returned as well.

Affected products

• F5 BIG-IP APM: 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.2, 11.5.3 (+7)
• BIG-IP: 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.2, 11.5.3 (+7)
• F5 Big-Ip Analytics: 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.2, 11.5.3 (+7)
• F5 Networks, Inc. BIG-IP (AAM): 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.2, 11.5.3 (+7)
• BIG-IP ASM: 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.2, 11.5.3 (+7)
• F5 Big-Ip Global Traffic Manager: 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.2, 11.5.3 (+3)
• F5 Big-Ip Link Controller: 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.2, 11.5.3 (+7)
• F5 BIG-IP (LTM): 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.2, 11.5.3 (+7)
• F5 Networks, Inc. BIG-IP (PEM): 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.2, 11.5.3 (+7)
• F5 Big-Ip Protocol Security Module: 11.4.0, 11.4.1

References

• http://packetstormsecurity.com/files/141017/Ticketbleed-F5-TLS-Information-Disclosure.html
• http://www.securityfocus.com/bid/96143
• http://www.securitytracker.com/id/1037800
• https://blog.filippo.io/finding-ticketbleed/
• https://filippo.io/Ticketbleed/
• https://github.com/0x00string/oldays/blob/master/CVE-2016-9244.py
• https://support.f5.com/csp/article/K05121675
• https://www.exploit-db.com/exploits/41298/
• http://packetstormsecurity.com/files/141017/Ticketbleed-F5-TLS-Information-Disclosure.html
• http://www.securityfocus.com/bid/96143
• http://www.securitytracker.com/id/1037800
• https://blog.filippo.io/finding-ticketbleed/

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