var-201906-0681
Vulnerability from variot

A vulnerability in the Secure Shell (SSH) authentication function of Cisco IOS XR Software could allow an authenticated, remote attacker to successfully log in to an affected device using two distinct usernames. The vulnerability is due to a logic error that may occur when certain sequences of actions are processed during an SSH login event on the affected device. An attacker could exploit this vulnerability by initiating an SSH session to the device with a specific sequence that presents the two usernames. A successful exploit could result in logging data misrepresentation, user enumeration, or, in certain circumstances, a command authorization bypass. See the Details section for more information. Cisco IOS XR There is an authorization vulnerability in the software.Information may be obtained and information may be altered. An attacker can exploit this issue to gain unauthorized access, perform unintended actions and cause denial-of-service conditions. This may lead to further attacks. This issue is being tracked by Cisco Bug ID CSCvo03672. This vulnerability stems from the lack of authentication measures or insufficient authentication strength in network systems or products

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