CVE-2022-20676: Cisco IOS XE Software Tool Command Language Privilege Escalation Vulnerability
First published: Fri Apr 15 2022(Updated: )
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.
Credit: ykramarz@cisco.com ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco IOS XE | ||
| Cisco IOS XE | =16.12.1z2 | |
| Cisco IOS XE | =17.2.1 | |
| Cisco IOS XE | =17.2.1a | |
| Cisco IOS XE | =17.2.1r | |
| Cisco IOS XE | =17.2.1v | |
| Cisco IOS XE | =17.2.2 | |
| Cisco IOS XE | =17.2.3 | |
| Cisco IOS XE | =17.3.1 | |
| Cisco IOS XE | =17.3.1a | |
| Cisco IOS XE | =17.3.1w | |
| Cisco IOS XE | =17.3.1x | |
| Cisco IOS XE | =17.3.1z | |
| Cisco IOS XE | =17.3.2 | |
| Cisco IOS XE | =17.3.2a | |
| Cisco IOS XE | =17.3.3 | |
| Cisco IOS XE | =17.3.3a | |
| Cisco IOS XE | =17.3.4 | |
| Cisco IOS XE | =17.3.4a | |
| Cisco IOS XE | =17.3.4b | |
| Cisco IOS XE | =17.3.4c | |
| Cisco IOS XE | =17.4.1 | |
| Cisco IOS XE | =17.4.1a | |
| Cisco IOS XE | =17.4.1b | |
| Cisco IOS XE | =17.4.1c | |
| Cisco IOS XE | =17.4.2 | |
| Cisco IOS XE | =17.4.2a | |
| Cisco IOS XE | =17.5.1 | |
| Cisco IOS XE | =17.5.1a | |
| Cisco IOS XE | =17.5.1c |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
Frequently Asked Questions
What is CVE-2022-20676?
CVE-2022-20676 is a vulnerability in the Tool Command Language (Tcl) interpreter of Cisco IOS XE Software.
What is the severity of CVE-2022-20676?
The severity of CVE-2022-20676 is high.
How does CVE-2022-20676 affect Cisco IOS XE Software?
CVE-2022-20676 allows an authenticated, local attacker to escalate from privilege level 15 to root-level privileges in Cisco IOS XE Software.
What is the CWE classification of CVE-202-20676?
CVE-202-20676 is classified under CWE-20 (Improper Input Validation) and CWE-250 (Execution with Unnecessary Privileges).
How can I fix CVE-2022-20676?
To fix CVE-2022-20676, apply the necessary updates and patches provided by Cisco.
- collector/nvd-index
- agent/type
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- agent/author
- agent/weakness
- agent/softwarecombine
- agent/references
- agent/description
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/severity
- agent/title
- agent/tags
- agent/first-publish-date
- agent/event
- vendor/cisco
- canonical/cisco ios xe
- version/cisco ios xe/16.12.1z2
- version/cisco ios xe/17.2.1
- version/cisco ios xe/17.2.1a
- version/cisco ios xe/17.2.1r
- version/cisco ios xe/17.2.1v
- version/cisco ios xe/17.2.2
- version/cisco ios xe/17.2.3
- version/cisco ios xe/17.3.1
- version/cisco ios xe/17.3.1a
- version/cisco ios xe/17.3.1w
- version/cisco ios xe/17.3.1x
- version/cisco ios xe/17.3.1z
- version/cisco ios xe/17.3.2
- version/cisco ios xe/17.3.2a
- version/cisco ios xe/17.3.3
- version/cisco ios xe/17.3.3a
- version/cisco ios xe/17.3.4
- version/cisco ios xe/17.3.4a
- version/cisco ios xe/17.3.4b
- version/cisco ios xe/17.3.4c
- version/cisco ios xe/17.4.1
- version/cisco ios xe/17.4.1a
- version/cisco ios xe/17.4.1b
- version/cisco ios xe/17.4.1c
- version/cisco ios xe/17.4.2
- version/cisco ios xe/17.4.2a
- version/cisco ios xe/17.5.1
- version/cisco ios xe/17.5.1a
- version/cisco ios xe/17.5.1c