Improper access control in Cisco IOS XR - CVE-2022-20821
Published: May 21, 2022
Vulnerability identifier: #VU63500
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:A/U:Green
CVE-ID: CVE-2022-20821
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vendor: Cisco Systems, Inc
Affected software:
Cisco IOS XR
Cisco IOS XR
Detailed vulnerability description
The vulnerability allows a remote attacker to gain unauthorized access to sensitive information.
The vulnerability exists due to unrestricted access to the Redis instance running within the NOSi container, accessible via port 6379/tcp (the health check RPM opens this port by default). A remote non-authenticated attacker can connect to the Redis instance and obtain sensitive information or modify it.
Note, the vulnerability is being actively exploited in the wild.
How to mitigate CVE-2022-20821
Install updates from vendor's website.