CVE-2020-5938 Weak cryptography in BIG-IP
Authenticated peers can negotiate weaker IPSec key lengths than configured, potentially bypassing cryptographic security requirements on BIG-IP devices.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-5938?
CVE-2020-5938 is a medium-severity vulnerability in F5 Big-Ip Access Policy Manager, published on 29 Oct 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
On BIG-IP 13.1.0-13.1.3.4, 12.1.0-12.1.5.2, and 11.6.1-11.6.5.2, when negotiating IPSec tunnels with configured, authenticated peers, the peer may negotiate a different key length than the BIG-IP configuration would otherwise allow.
Weakness: CWE-326
Which versions are affected by CVE-2020-5938?
It affects 14 products.
Products include F5 Big-Ip Access Policy Manager, F5 Big-Ip Advanced Firewall Manager, F5 Big-Ip Advanced Web Application Firewall, F5 Big-Ip Analytics, F5 Big-Ip Application Acceleration Manager, F5 Big-Ip Application Security Manager and 8 more.
How do I fix CVE-2020-5938?
No fix has been published for CVE-2020-5938 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-5938 being exploited?
There is no known exploitation of CVE-2020-5938 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-4h4h-mcvx-ffv6.