Cisco Bug: CSCun75294 - Cisco IOS XR SSH Login Vulnerability
Jan 30, 2020
- Cisco Carrier Routing System
Known Affected Releases
Symptom: A vulnerability in OpenSSH module of the Cisco IOS XR Software could allow an "authenticated", remote attacker to cause the SSH login process to reset unexpectedly. The vulnerability is due to improperly input validation of the channel identifier with the SSH handshake negotiation . An attacker could exploit this vulnerability by initiating a SSH session with the device and sending a crafted SSH packet in the negotiation with an invalid channel identified. An exploit could allow the attacker to reset the SSH login process causing a partial denial of service (DoS) condition. Conditions: Device running with SSH in the configuration running an affected version of software.
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Bug Details Include
- Full Description (including symptoms, conditions and workarounds)
- Known Fixed Releases
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