CVE-2008-4609 Denial of service in n/a

High 7.1 Published 20 Oct 2008 Updated 7 Aug 2024

Remote attackers can exhaust TCP connection queues via state table manipulation, causing denial of service across multiple operating systems.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2008-4609?

CVE-2008-4609 is a high-severity denial of service vulnerability in Cisco Ios, published on 20 Oct 2008. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The TCP implementation in (1) Linux, (2) platforms based on BSD Unix, (3) Microsoft Windows, (4) Cisco products, and probably other operating systems allows remote attackers to cause a denial of service (connection queue exhaustion) via multiple vectors that manipulate information in the TCP state table, as demonstrated by sockstress.

Weakness: CWE-16

Which versions are affected by CVE-2008-4609?

It affects 19 products.

Products include Bsd Bsd, Bsdi Bsd Os, Cisco Catalyst Blade Switch 3020 Firmware, Cisco Catalyst Blade Switch 3120 Firmware, Cisco Catalyst Blade Switch 3120x Firmware, Cisco Ios and 13 more.

How do I fix CVE-2008-4609?

Apply the vendor's patch.

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-2008-4609 being exploited?

There is no known exploitation of CVE-2008-4609 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

All Cisco Ios vulnerabilities

Sources

Also known as AZL-6513, DEBIAN-CVE-2008-4609, GHSA-vf4j-pjcc-qf79, ROOT-OS-DEBIAN-11-CVE-2008-4609, ROOT-OS-DEBIAN-12-CVE-2008-4609, ROOT-OS-DEBIAN-13-CVE-2008-4609.