VAR-200112-0001

Vulnerability from variot - Updated: 2025-04-03 22:16

Cisco 12000 with IOS 12.0 and line cards based on Engine 2 does not handle the "fragment" keyword in a compiled ACL (Turbo ACL) for packets that are sent to the router, which allows remote attackers to cause a denial of service via a flood of fragments. IOS is the Cisco Internet Operating System, distributed with and used on various Cisco network hardware. A possible vulnerability in IOS on the 12000 series Cisco routers could make it possible for a remote user to send unauthorized traffic to a protected network. IOS for the Cisco 12000 has only recently added the ability to filter fragmented packets in outgoing traffic. If a 'fragment' rule in an outgoing ACL exists in a version without this feature, attackers may be able to evade it and send fragmented packets to a protect network. This vulnerability may result in attackers or users bypassing security policy

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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