Vulnerability Note VU#363374

Cisco CSS 11000 Series Content Services Switch vulnerable to DoS via malformed UDP packets

Original Release date: 05 Mar 2004 | Last revised: 29 Jul 2004

Overview

Several models of the Cisco Content Services Switch contain a vulnerability in their management interface that allows an attacker to restart the switch, resulting in a denial of service attack.

Description

The Cisco CSS 11000 Series Content Services Switches contain a vulnerability in their handling of malformed UDP packets. An attacker with access to the management port of an affected switch can send a UDP packet to the app-udp port (5002/udp) that will cause the switch to restart. This vulnerability affects CSS 11000 Series switches that run versions 5.0(x) and 6.10(x) of Cisco WebNS, a service that allows the CSS switch to be configured remotely using an HTML-based application.

Cisco reports that an attacker must have access to the management port of an affected switch, and that this interface is not accessible through other ports on the switch. Therefore, the attacker must have physical access to the switch or to an out-of-band management network that it is connected to. For further details, please see the Cisco Advisory.

Impact

Attackers with access to the management interface of an affected switch can restart it repeatedly, resulting in a denial of service.

Solution

Upgrade to a newer version of WebNS. For systems running version 5.0(x) of WebNS, upgrade to 05.0(04.07)S or later. For systems running version 6.10(x) of WebNS, upgrade to 06.10(02.05)S or later.

Systems Affected (Learn More)

VendorStatusDate NotifiedDate Updated
Cisco Systems Inc.Affected04 Mar 200415 Mar 2004
If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A N/A

References

Credit

This vulnerability was reported by the Cisco Systems Product Security Incident Response Team (PSIRT).

This document was written by Damon Morda and Jeffrey P. Lanza.

Other Information

  • CVE IDs: Unknown
  • Date Public: 04 Mar 2004
  • Date First Published: 05 Mar 2004
  • Date Last Updated: 29 Jul 2004
  • Severity Metric: 1.86
  • Document Revision: 30

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