CVE-2020-5891 Denial of service in BIG-IP
Attackers can cause denial of service on BIG-IP virtual servers using specific HTTP/2 requests when Fallback Host and HTTP/2 profiles are configured.
- 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-2020-5891?
CVE-2020-5891 is a high-severity denial of service vulnerability in F5 Big-Ip Access Policy Manager, published on 30 Apr 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
On BIG-IP 15.1.0-15.1.0.1, 15.0.0-15.0.1.2, and 14.1.0-14.1.2.3, undisclosed HTTP/2 requests can lead to a denial of service when sent to a virtual server configured with the Fallback Host setting and a server-side HTTP/2 profile.
Which versions are affected by CVE-2020-5891?
It affects 9 products.
Products include F5 Big-Ip Access Policy Manager, F5 Big-Ip Advanced Firewall Manager, F5 Big-Ip Analytics, F5 Big-Ip Application Acceleration Manager, F5 Big-Ip Application Security Manager, F5 Big-Ip Fraud Protection Service and 3 more.
How do I fix CVE-2020-5891?
No fix has been published for CVE-2020-5891 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-2020-5891 being exploited?
There is no known exploitation of CVE-2020-5891 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-cc6m-87j4-399f.