Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2022-20821

Severity CVSS v4.0:
Pending analysis
Type:
CWE-200 Information Leak / Disclosure
Publication date:
26/05/2022
Last modified:
28/10/2025

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.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N CVSS v3.1 Severity and Metrics:

Base Score: 6.50 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): Low
Integrity (I): Low
Availability (A): None

Base Score 3.x
6.50
Severity 3.x
MEDIUM
Vector 2.0
AV:N/AC:L/Au:N/C:P/I:P/A:N CVSS v2.0 Severity and Metrics:

Base Score: 6.40 MEDIUM
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): Physical
Availability (A): None

Base Score 2.0
6.40
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:cisco:ios_xr:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:8201:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:8202:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:8208:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:8212:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:8218:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:ncs-55a1-24h:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:ncs-55a1-24q6h-s:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:ncs-55a1-36h-s:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:ncs-55a1-36h-se:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:ncs-55a1-36h-se-s:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:ncs-55a2-mod-hd-s:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:ncs-55a2-mod-hx-s:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:ncs-55a2-mod-s:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:ncs-55a2-mod-se-h-s:-:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools