CVE-2020-5942 Denial of service in BIG-IP (PEM)
Attackers can cause a denial of service by sending malicious CEA packets to BIG-IP PEM, triggering a core file generation and restart.
- 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-2020-5942?
CVE-2020-5942 is a high-severity denial of service vulnerability in F5 Big-Ip Policy Enforcement Manager, published on 5 Nov 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In BIG-IP PEM versions 16.0.0-16.0.0.1, 15.1.0-15.1.0.5, 14.1.0-14.1.2.7, 13.1.0-13.1.3.4, 12.1.0-12.1.5.2, and 11.6.1-11.6.5.2, when processing Capabilities-Exchange-Answer (CEA) packets with certain attributes from the Policy and Charging Rules Function (PCRF) server, the Traffic Management Microkernel (TMM) may generate a core file and restart.
Which versions are affected by CVE-2020-5942?
It affects 1 product.
Products include F5 Big-Ip Policy Enforcement Manager.
How do I fix CVE-2020-5942?
No fix has been published for CVE-2020-5942 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2020-5942 being exploited?
There is no known exploitation of CVE-2020-5942 in the wild and no public exploit code.
Other vulnerabilities in F5 Big-Ip Policy Enforcement Manager
Sources
Also known as GHSA-3qrg-2wxx-492r.