Title: Cisco Fragment Keyword Outgoing Access Control Vulnerability
Severity: HIGH
Description:
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.
Affected Products:
- Cisco IOS 12.0S
- Cisco IOS 12.0ST
References:
- Cisco Systems: Cisco Product Security Incident Response
Juniper Networks provides this content via a wide variety of sources and production methods. If notified of errors or omissions in the content of this page, Juniper Networks, at its discretion, will modify or remove the page or leave the content as is, depending on various factors including but not limited to the reputation and authority of the party providing the notification. Please use the contact information displayed elsewhere on this page to report any errors or omissions regarding the content on this page.
