CVE-2019-6596 Memory corruption in BIG-IP (APM)
Attackers can cause a crash in F5 BIG-IP APM by sending fragmented DTLS ClientHello messages, requiring DTLS connections to be enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2019-6596?
CVE-2019-6596 is a high-severity memory corruption vulnerability in F5 Big-Ip Access Policy Manager, published on 13 Mar 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In BIG-IP 14.0.0-14.0.0.2, 13.0.0-13.1.1.1, 12.1.0-12.1.3.6, 11.6.1-11.6.3.2, or 11.5.1-11.5.8, when processing fragmented ClientHello messages in a DTLS session TMM may corrupt memory eventually leading to a crash. Only systems offering DTLS connections via APM are impacted.
Which versions are affected by CVE-2019-6596?
It affects 1 product.
Products include F5 Big-Ip Access Policy Manager.
How do I fix CVE-2019-6596?
No fix has been published for CVE-2019-6596 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2019-6596 being exploited?
There is no known exploitation of CVE-2019-6596 in the wild and no public exploit code.
Other vulnerabilities in F5 Big-Ip Access Policy Manager
- CVE-2023-46747 F5 BIG-IP Configuration Utility Authentication Bypass
- CVE-2022-1388 F5 BIG-IP Missing Authentication
- CVE-2021-22986 F5 BIG-IP and BIG-IQ Centralized Management iControl REST Remote Code Execution
- CVE-2021-22991 F5 BIG-IP Traffic Management Microkernel Buffer Overflow
- CVE-2020-5902 F5 BIG-IP Traffic Management User Interface (TMUI) Remote Code Execution
Sources
Also known as GHSA-3crm-xx9m-c72v.