CVE-2020-27728 Denial of service in BIG-IP ASM & Advanced WAF
Attackers can cause a denial of service by triggering a core file generation and restart in the AVRD daemon via mobile device requests.
- 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-2020-27728?
CVE-2020-27728 is a high-severity denial of service vulnerability in F5 Big-Ip Advanced Web Application Firewall, published on 24 Dec 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
On BIG-IP ASM & Advanced WAF versions 16.0.0-16.0.0.1, 15.1.0-15.1.0.5, and 14.1.0-14.1.3, under certain conditions, Analytics, Visibility, and Reporting daemon (AVRD) may generate a core file and restart on the BIG-IP system when processing requests sent from mobile devices.
Which versions are affected by CVE-2020-27728?
It affects 2 products.
Products include F5 Big-Ip Advanced Web Application Firewall, F5 Big-Ip Application Security Manager.
How do I fix CVE-2020-27728?
No fix has been published for CVE-2020-27728 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-2020-27728 being exploited?
There is no known exploitation of CVE-2020-27728 in the wild and no public exploit code.
Other vulnerabilities in F5 Big-Ip Advanced Web Application Firewall
- CVE-2021-23031 Privilege escalation in BIG-IP Advanced WAF and BIG-IP ASM
- CVE-2021-23029 Server-side request forgery in BIG-IP Advanced WAF and BIG-IP ASM
- CVE-2021-23014 Missing authorization in BIG-IP ASM/Advanced WAF
- CVE-2021-22993 Cross-site scripting in BIG-IP Advanced WAF and BIG-IP ASM
- CVE-2026-40060 BIG-IP Advanced WAF and ASM vulnerability
All F5 Big-Ip Advanced Web Application Firewall vulnerabilities
Sources
Also known as GHSA-6995-mfw9-q3hp.