CVE-2022-20821

Common vulnerabilities & exposures (CVE)

CVE database CVE database blogpost Release & EoL database

Published at: - 26-05-2022 04:15

Last modified: - 07-06-2022 06:51

Total changes: - 2

Description

A vulnerability in the health check RPM of Cisco IOS XR Software could allow an unauthenticated, remote attacker to access the Redis instance that is running within the NOSi container. This vulnerability exists because the health check RPM opens TCP port 6379 by default upon activation. An attacker could exploit this vulnerability by connecting to the Redis instance on the open port. A successful exploit could allow the attacker to write to the Redis in-memory database, write arbitrary files to the container filesystem, and retrieve information about the Redis database. Given the configuration of the sandboxed container that the Redis instance runs in, a remote attacker would be unable to execute remote code or abuse the integrity of the Cisco IOS XR Software host system.

Common Vulnerability Scoring System (CVSS)

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

Low

Attack complexity

Network

Attack vector

None

Availability

Low

Confidentiality

Low

Integrity

None

Privileges required

Unchanged

Scope

None

User interaction

6.5

Base score

3.9

2.5

Exploitability score

Impact score

Verification logic

AND

vendor=cisco AND product=ios_xr AND version=-

vendor=cisco AND product=ncs_1002 AND version=-

vendor=cisco AND product=ncs_1004 AND version=-

vendor=cisco AND product=ncs_1001 AND version=-

vendor=cisco AND product=ncs-55a2-mod-s AND version=-

vendor=cisco AND product=ncs-55a2-mod-hd-s AND version=-

vendor=cisco AND product=ncs-55a2-mod-hx-s AND version=-

vendor=cisco AND product=ncs-55a2-mod-se-s AND version=-

vendor=cisco AND product=ncs-55a2-mod-se-h-s AND version=-

vendor=cisco AND product=ncs-55a1-24h AND version=-

vendor=cisco AND product=ncs-55a1-36h-s AND version=-

vendor=cisco AND product=8201 AND version=-

vendor=cisco AND product=8202 AND version=-

vendor=cisco AND product=8208 AND version=-

vendor=cisco AND product=8212 AND version=-

vendor=cisco AND product=8218 AND version=-

vendor=cisco AND product=ncs-55a1-24q6h-s AND version=-

vendor=cisco AND product=ncs-55a1-36h-se AND version=-

vendor=cisco AND product=ncs-55a1-36h-se-s AND version=-

vendor=cisco AND product=ncs_5001 AND version=-

vendor=cisco AND product=ncs_5002 AND version=-

vendor=cisco AND product=ncs_5501-se AND version=-

vendor=cisco AND product=ncs_5502-se AND version=-

vendor=cisco AND product=ncs_5504 AND version=-

vendor=cisco AND product=ncs_5508 AND version=-

vendor=cisco AND product=ncs_5516 AND version=-

vendor=cisco AND product=ncs_55a1 AND version=-

vendor=cisco AND product=ncs_55a2 AND version=-

Reference

20220520 Cisco IOS XR Software Health Check Open Port Vulnerability-Vendor Advisory

Keywords

CVE-2022-20821

Common vulnerabilities & exposures (CVE)

Description

Common Vulnerability Scoring System (CVSS)

Verification logic

Reference

NVD

CVE-2022-20821

CVE

Common vulnerabilities & exposures

CVSS

Common vulnerability scoring system

Security

Vulnerabilities

Exposures