CVE-2022-20821: Cisco IOS XR Open Port Vulnerability

CISA Known Exploited Vulnerability (KEV)

Description

Cisco IOS XR software health check opens TCP port 6379 by default on activation. An attacker can connect to the Redis instance on the open port and allow access to the Redis instance that is running within the NOSi container.

Required action (CISA)

Apply updates per vendor instructions.

Notes

https://nvd.nist.gov/vuln/detail/CVE-2022-20821

Weakness behind it

CISA records this vulnerability as an instance of CWE-923. From there the chain continues into CAPEC attack patterns and ATT&CK techniques, all inside this corpus.

References

• NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-20821
• KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog