Vulnerability Details : CVE-2022-20676
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.
Vulnerability category: Input validation
Products affected by CVE-2022-20676
- 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:17.2.1:*:*:*:*:*:*:*
- 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:17.3.2:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios_xe:17.3.2a:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios_xe:17.4.1:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios_xe:17.4.1a:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios_xe:17.4.1b:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios_xe:17.5.1:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios_xe:17.3.1z:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios_xe:17.4.1c:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios_xe:17.3.3:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios_xe:17.3.3a:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios_xe:17.5.1a:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios_xe:16.12.1z2:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios_xe:17.3.4:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios_xe:17.3.4a:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios_xe:17.3.4b:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios_xe:17.3.4c:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios_xe:17.4.2:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios_xe:17.4.2a:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios_xe:17.5.1c:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2022-20676
0.04%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 6 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2022-20676
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.2
|
HIGH | AV:L/AC:L/Au:N/C:C/I:C/A:C |
3.9
|
10.0
|
NIST | |
|
5.1
|
MEDIUM | CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:N |
0.8
|
4.2
|
Cisco Systems, Inc. | |
|
6.7
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
0.8
|
5.9
|
NIST | |
|
5.1
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:N |
0.8
|
4.2
|
Cisco Systems, Inc. | 2024-03-06 |
CWE ids for CVE-2022-20676
-
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.Assigned by: nvd@nist.gov (Primary)
-
The product performs an operation at a privilege level that is higher than the minimum level required, which creates new weaknesses or amplifies the consequences of other weaknesses.Assigned by: ykramarz@cisco.com (Secondary)
References for CVE-2022-20676
-
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-priv-esc-grbtubU
Cisco IOS XE Software Tool Command Language Privilege Escalation VulnerabilityVendor Advisory
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