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6.5
CVSS
Medium

CVE-2022-20821

PUBLISHED

Cisco IOS XR Software Health Check Open Port Vulnerability

Exploited in the wild Remote Low complexity No user interaction
Vendor
Cisco
Product
Cisco IOS XR Software
Published
May 26, 2022
EPSS
—

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.

redis ios cisa edge

CVSS scores

CVSS v3.1 6.5 Medium

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

Exploitation status

Exploited in the wild

Recorded 2022-05-23 00:00:00 UTC · Source

SSVC decision points

Exploitation
active
Automatable
Yes
Technical impact
partial

References

Known exploited vulnerability sources

Catalogues that list this CVE as a known exploited vulnerability.

Source Added
CISA May 23, 2022

Timeline

  • CVE ID Reserved

  • Added to KEVIntel

  • CVE Published to Public