CVE-2022-20821

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Summary

CVECVE-2022-20821
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2022-05-26 14:15:00 UTC
Updated2023-11-07 03:43:00 UTC
DescriptionA 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.

Risk And Classification

EPSS: 0.088360000 probability, percentile 0.925020000 (date 2026-04-01)

CISA KEV: Listed on 2022-05-23; due 2022-06-13; ransomware use Unknown

Problem Types: CWE-200

CISA Known Exploited Vulnerability

VendorCisco
ProductIOS XR
NameCisco IOS XR Open Port Vulnerability
Required ActionApply updates per vendor instructions.
Noteshttps://nvd.nist.gov/vuln/detail/CVE-2022-20821

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Hardware Cisco 8201 - All All All
Hardware Cisco 8202 - All All All
Hardware Cisco 8208 - All All All
Hardware Cisco 8212 - All All All
Hardware Cisco 8218 - All All All
Operating System Cisco Ios Xr - All All All
Hardware Cisco Ncs-55a1-24h - All All All
Hardware Cisco Ncs-55a1-24q6h-s - All All All
Hardware Cisco Ncs-55a1-36h-s - All All All
Hardware Cisco Ncs-55a1-36h-se - All All All
Hardware Cisco Ncs-55a1-36h-se-s - All All All
Hardware Cisco Ncs-55a2-mod-hd-s - All All All
Hardware Cisco Ncs-55a2-mod-hx-s - All All All
Hardware Cisco Ncs-55a2-mod-s - All All All
Hardware Cisco Ncs-55a2-mod-se-h-s - All All All
Hardware Cisco Ncs-55a2-mod-se-s - All All All
Hardware Cisco Ncs 1001 - All All All
Hardware Cisco Ncs 1002 - All All All
Hardware Cisco Ncs 1004 - All All All
Hardware Cisco Ncs 5001 - All All All
Hardware Cisco Ncs 5002 - All All All
Hardware Cisco Ncs 5501-se - All All All
Hardware Cisco Ncs 5502-se - All All All
Hardware Cisco Ncs 5504 - All All All
Hardware Cisco Ncs 5508 - All All All
Hardware Cisco Ncs 5516 - All All All
Hardware Cisco Ncs 55a1 - All All All
Hardware Cisco Ncs 55a2 - All All All

References

ReferenceSourceLinkTags
20220520 Cisco IOS XR Software Health Check Open Port Vulnerability CISCO tools.cisco.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
CISA Known Exploited Vulnerabilities catalog CISA www.cisa.gov kev

Legacy QID Mappings

  • 317189 Cisco Internetwork Operating System (IOS) XR Software Health Check Open Port Vulnerability (cisco-sa-iosxr-redis-ABJyE5xK)
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