Cisco IOS XR Open Port Vulnerability

Technical Severity

CVSS v3.1 Metrics

MEDIUM

6.5 / 10

Minimal Risk Critical

Vector Specification

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Exploitation Likelihood

EPSS Prediction

8.84 %

Predictive Probability

Percentile Rank

92.5 th

Documented as more likely to be exploited than 92.5% of known CVEs.

Detection Date

May 23, 2022

Remediation Due

Jun 13, 2022

CISA Catalog Active

Threat Analysis

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.

Remediation Directive

Apply updates per vendor instructions.

External Intelligence

NVD

National Vulnerability Database

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