Security restrictions bypass in Cisco IOS - CVE-2018-0484
Published: January 9, 2019 / Updated: January 10, 2019
Vulnerability identifier: #VU16928
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-0484
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass security restrictions on the target system.
The vulnerability exists in the access control logic of the Secure Shell (SSH) server due to a missing check in the SSH server. A remote unauthenticated attacker can open an SSH connection to an affected Cisco IOS or IOS XE device with a source address belonging to a VRF instance and forward the instance despite the absence of the vrf-also keyword in the access-class configuration.
Affected software
Cisco IOS
How to mitigate CVE-2018-0484
The vulnerability has been fixed in the versions 16.6.5, 16.6(4.12), 15.8(3.1s)M, 15.8(3)M1.
Cisco IOS - addressed in versions 15.8.3 M1, 15.8.3.1s M, 16.6.4.12, 16.6.5