CVE-2019-6593 Weak cryptography in BIG-IP (LTM, AAM, AFM, Analytics, APM, ASM, DNS, Edge Gateway, FPS, GTM, Link Controller, PEM, WebAccelerator)

Medium 5.9 Published 26 Feb 2019 Updated 16 Sep 2024

A chosen ciphertext attack against CBC ciphers in BIG-IP Client SSL profiles allows attackers to recover plaintext via MITM.

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-2019-6593?

CVE-2019-6593 is a medium-severity vulnerability in F5 Big-Ip Access Policy Manager, published on 26 Feb 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

On BIG-IP 11.5.1-11.5.4, 11.6.1, and 12.1.0, a virtual server configured with a Client SSL profile may be vulnerable to a chosen ciphertext attack against CBC ciphers. When exploited, this may result in plaintext recovery of encrypted messages through a man-in-the-middle (MITM) attack, despite the attacker not having gained access to the server's private key itself. (CVE-2019-6593 also known as Zombie POODLE and GOLDENDOODLE.)

Weakness: CWE-327

Which versions are affected by CVE-2019-6593?

It affects 12 products.

Products include F5 Big-Ip Access Policy Manager, F5 Big-Ip Advanced Firewall Manager, F5 Big-Ip Analytics, F5 Big-Ip Application Security Manager, F5 Big-Ip Domain Name System, F5 Big-Ip Edge Gateway and 6 more.

How do I fix CVE-2019-6593?

No fix has been published for CVE-2019-6593 yet. Limit exposure of the affected software until one is available.

Is CVE-2019-6593 being exploited?

There is no known exploitation of CVE-2019-6593 in the wild and no public exploit code.

All F5 Big-Ip Access Policy Manager vulnerabilities

Sources

Also known as GHSA-2g49-gr5q-f4v2.