Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2022-20676

Severity CVSS v4.0:
Pending analysis
Type:
CWE-20 Input Validation
Publication date:
15/04/2022
Last modified:
06/03/2024

Description

A vulnerability in the Tool Command Language (Tcl) interpreter of Cisco IOS XE Software could allow an authenticated, local attacker to escalate from privilege level 15 to root-level privileges. This vulnerability is due to insufficient input validation of data that is passed into the Tcl interpreter. An attacker could exploit this vulnerability by loading malicious Tcl code on an affected device. A successful exploit could allow the attacker to execute arbitrary commands as root. By default, Tcl shell access requires privilege level 15.

Impact

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

Base Score: 6.70 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

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

Base Score 3.x
6.70
Severity 3.x
MEDIUM
Vector 2.0
AV:L/AC:L/Au:N/C:C/I:C/A:C CVSS v2.0 Severity and Metrics:

Base Score: 7.20 HIGH
Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C

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

Base Score 2.0
7.20
Severity 2.0
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:cisco:ios_xe:16.12.1z2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.2.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.2.1a:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.2.1r:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.2.1v:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.2.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.2.3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.3.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.3.1a:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.3.1w:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.3.1x:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.3.1z:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.3.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.3.2a:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:17.3.3:*:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools