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Vulnerability Note VU#363374Cisco CSS 11000 Series Content Services Switch vulnerable to DoS via malformed UDP packetsOverviewSeveral 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.I. DescriptionThe 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.
References
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.
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