CVE-2009-4921 Denial of service in n/a

High 7.8 Published 29 Jun 2010 Updated 17 Sep 2024

Remote attackers can cause a denial of service on Cisco ASA devices by sending malformed TCP packets, requiring a software upgrade.

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-2009-4921?

CVE-2009-4921 is a high-severity denial of service vulnerability in n/a, published on 29 Jun 2010. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Cisco Adaptive Security Appliances (ASA) 5580 series devices with software before 8.1(2) allow remote attackers to cause a denial of service (traceback) via malformed TCP packets, aka Bug ID CSCsm84110.

Weakness: CWE-20

Which versions are affected by CVE-2009-4921?

It affects 1 product.

Products include Cisco Asa 5580.

How do I fix CVE-2009-4921?

No fix has been published for CVE-2009-4921 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-2009-4921 being exploited?

There is no known exploitation of CVE-2009-4921 in the wild and no public exploit code.

Sources

Also known as GHSA-3qqh-3r54-2rh5.