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Cisco IOS: CVE-2018-0484: Cisco IOS and IOS XE Software Secure Shell Connection on VRF Vulnerability

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Cisco IOS: CVE-2018-0484: Cisco IOS and IOS XE Software Secure Shell Connection on VRF Vulnerability

Severity
4
CVSS
(AV:N/AC:L/Au:S/C:N/I:P/A:N)
Published
01/10/2019
Created
03/19/2019
Added
01/10/2019
Modified
12/06/2021

Description

A vulnerability in the access control logic of the Secure Shell (SSH) server of Cisco IOS and IOS XE Software may allow connections sourced from a virtual routing and forwarding (VRF) instance despite the absence of the vrf-also keyword in the access-class configuration. The vulnerability is due to a missing check in the SSH server. An attacker could use this vulnerability to open an SSH connection to an affected Cisco IOS or IOS XE device with a source address belonging to a VRF instance. Once connected, the attacker would still need to provide valid credentials to access the device.

Solution(s)

  • cisco-ios-upgrade-latest

References

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