CVE-2022-20821
Cisco IOS XR Software Health Check Open Port Vulnerability
Basic Information
- CVE State
- PUBLISHED
- Reserved Date
- November 02, 2021
- Published Date
- May 26, 2022
- Last Updated
- October 29, 2024
- Vendor
- Cisco
- Product
- Cisco IOS XR Software
- 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.
CVSS Scores
CVSS v3.1
6.5 - MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
SSVC Information
- Exploitation
- active
- Automatable
- Yes
- Technical Impact
- partial
Exploit Status
- Exploited in the Wild
- Yes (added 2022-05-23 00:00:00 UTC) Source
References
Known Exploited Vulnerability Information
| Source | Added Date |
|---|---|
| CISA | 2022-05-23 00:00:00 UTC |