CVE-2015-8240 Denial of service in n/a

High 7.5 Published 11 Apr 2016 Updated 6 Aug 2024

Remote attackers can cause a denial of service in F5 BIG-IP systems by exploiting improper handling of TCP options in the Traffic Management Microkernel.

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-2015-8240?

CVE-2015-8240 is a high-severity denial of service vulnerability in F5 Big-Ip Access Policy Manager, published on 11 Apr 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The Traffic Management Microkernel (TMM) in F5 BIG-IP LTM, AAM, AFM, Analytics, APM, ASM, GTM, Link Controller, and BIG-IP PEM before 11.4.1 HF10, 11.5.x before 11.5.4, and 11.6.x before 11.6.0 HF6 and BIG-IP PSM before 11.4.1 HF10 does not properly handle TCP options, which allows remote attackers to cause a denial of service via unspecified vectors, related to the tm.minpathmtu database variable.

Weakness: CWE-19

Which versions are affected by CVE-2015-8240?

It affects 10 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 Global Traffic Manager and 4 more.

How do I fix CVE-2015-8240?

No fix has been published for CVE-2015-8240 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-2015-8240 being exploited?

There is no known exploitation of CVE-2015-8240 in the wild and no public exploit code.

All F5 Big-Ip Access Policy Manager vulnerabilities

Sources

Also known as GHSA-52h8-3q6w-fv2x.