CVE-2019-6671 Denial of service in BIG-IP
Attackers can cause resource starvation and denial of service on F5 BIG-IP devices by sending crafted packet fragments that trigger memory leaks in the traffic management module.
- 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-2019-6671?
CVE-2019-6671 is a high-severity denial of service vulnerability in F5 Big-Ip Access Policy Manager, published on 27 Nov 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
On BIG-IP 15.0.0-15.0.1, 14.1.0-14.1.2, 14.0.0-14.0.1, and 13.1.0-13.1.3.1, under certain conditions tmm may leak memory when processing packet fragments, leading to resource starvation.
Weakness: CWE-401
Which versions are affected by CVE-2019-6671?
It affects 13 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 Domain Name System and 7 more.
How do I fix CVE-2019-6671?
No fix has been published for CVE-2019-6671 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-2019-6671 being exploited?
There is no known exploitation of CVE-2019-6671 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-x2gh-jj85-3r25.