CVE-2018-5509 Denial of service in BIG-IP (LTM, AAM, AFM, APM, ASM, Link Controller, PEM, WebSafe)
Attackers can cause a denial of service on F5 BIG-IP devices by sending specific traffic to a virtual server with a non-standard configuration.
- 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-2018-5509?
CVE-2018-5509 is a high-severity denial of service vulnerability in F5 Big-Ip Access Policy Manager, published on 22 Mar 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
On F5 BIG-IP versions 13.0.0 or 12.1.0 - 12.1.3.1, when a specifically configured virtual server receives traffic of an undisclosed nature, TMM will crash and take the configured failover action, potentially causing a denial of service. The configuration which exposes this issue is not common and in general does not work when enabled in previous versions of BIG-IP. Starting in 12.1.0, BIG-IP will crash if the configuration which exposes this issue is enabled and the virtual server receives non TCP traffic. With the fix of this issue, additional configuration validation logic has been added to prevent this configuration from being applied to a virtual server. There is only data plane exposure to this issue with a non-standard configuration. There is no control plane exposure.
Weakness: CWE-20
Which versions are affected by CVE-2018-5509?
It affects 8 products.
Products include F5 Big-Ip Access Policy Manager, F5 Big-Ip Advanced Firewall Manager, F5 Big-Ip Application Acceleration Manager, F5 Big-Ip Application Security Manager, F5 Big-Ip Link Controller, F5 Big-Ip Local Traffic Manager and 2 more.
How do I fix CVE-2018-5509?
No fix has been published for CVE-2018-5509 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-2018-5509 being exploited?
There is no known exploitation of CVE-2018-5509 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-wc9j-qv4j-w6v6.