CVE-2004-0244: Cisco IOS

Medium severity, CVSS 4.7. EPSS: 1.1% chance of exploitation in the next 30 days.

Cisco 6000, 6500, and 7600 series systems with Multilayer Switch Feature Card 2 (MSFC2) and a FlexWAN or OSM module allow local users to cause a denial of service (hang or reset) by sending a layer 2 frame packet that encapsulates a layer 3 packet, but has inconsistent length values with that packet.

Affected products

• Cisco IOS: version 12.1e only; version 12.2sy only; version 12.2za only

Published 2004-11-23. Last modified 2026-06-16.