CVE-2018-0484

Cisco IOS and IOS XE Software Secure Shell Connection on VRF Vulnerability

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.

Category

5.3
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.15%
Vendor Advisory cisco.com
Affected: Cisco Cisco IOS
Published at:
Updated at:

References

Link Tags
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190109-ios-ssh-vrf vendor advisory
http://www.securityfocus.com/bid/106560 vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2018-0484?
CVE-2018-0484 has been scored as a medium severity vulnerability.
How to fix CVE-2018-0484?
To fix CVE-2018-0484, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-0484 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2018-0484 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2018-0484?
CVE-2018-0484 affects Cisco Cisco IOS.
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