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

CVE-2022-20821 · Severity: critical · CVSS 6.5 · Exploited in the wild · Published 2022-05-23

A vulnerability in the health check RPM of Cisco IOS XR Software opens TCP port 6379 by default, allowing unauthenticated remote access to a Redis instance within a sandboxed container. Attackers can write to the Redis database and the container filesystem, though they cannot execute code on the host system.

Technologies: Cisco IOS XR. Vendors: Cisco.

Quick answers

Is CVE-2022-20821 exploited in the wild?
Yes. CVE-2022-20821 is known to be exploited in the wild, first recorded on 23 May 2022. Treat it as urgent.
How severe is CVE-2022-20821?
Critical severity, with a CVSS score of 6.5, published 23 May 2022.
Which products and versions are affected?
Cisco IOS XR (none).
Is there a fix for CVE-2022-20821?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2022-20821 attacked?
It is attacked over the network, in an operating system.
Am I affected by CVE-2022-20821?
Check whether you run Cisco IOS XR. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • Cisco IOS XR (none)

Timeline

  • 2022-05-23: disclosed
  • 2022-05-23: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
  • 2022-05-23: exploited: Reported as exploited in the wild.

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