CVE-2019-6637 Denial of service in BIG-IP (ASM)
Authenticated users can trigger excessive memory consumption via ASM REST endpoints, causing system instability and process termination.
- 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-2019-6637?
CVE-2019-6637 is a medium-severity denial of service vulnerability in F5 Big-Ip Application Security Manager, published on 3 Jul 2019. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
On BIG-IP (ASM) 14.1.0-14.1.0.5, 14.0.0-14.0.0.4, 13.0.0-13.1.1.4, and 12.1.0-12.1.4, Application logic abuse of ASM REST endpoints can lead to instability of BIG-IP system. Exploitation of this issue causes excessive memory consumption which results in the Linux kernel triggering OOM killer on arbitrary processes. The attack requires an authenticated user with role of "Guest" or greater privilege. Note: "No Access" cannot login so technically it's a role but a user with this access role cannot perform the attack.
Which versions are affected by CVE-2019-6637?
It affects 1 product.
Products include F5 Big-Ip Application Security Manager.
How do I fix CVE-2019-6637?
No fix has been published for CVE-2019-6637 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-2019-6637 being exploited?
There is no known exploitation of CVE-2019-6637 in the wild and no public exploit code.
Other vulnerabilities in F5 Big-Ip Application Security Manager
Sources
Also known as GHSA-g336-28q4-56hj.