Cisco Catalyst SSH Protocol Mismatch Denial of Service Vulnerability

Software versions 6.1(1), 6.1(1a) and 6.1(1b) for Catalyst 4000, 5000, and 6000 devices that support SSH and 3 DES encryption contain a vulnerability that may allow an attacker to cause a denial of service.

If a connection is made to the SSH service on a vulnerable Catalyst device and the protocol mismatch error occurs, the device will be reset.


 

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