cve/2023/CVE-2023-20046.md

### [CVE-2023-20046](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-20046)
![](https://img.shields.io/static/v1?label=Product&message=Cisco%20ASR%205000%20Series%20Software&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=Cisco%20Ultra%20Cloud%20Core%20-%20User%20Plane%20Function&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3D%2021.11.0%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=%3D%20N%2FA%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Authentication%20Bypass%20by%20Alternate%20Name&color=brighgreen)

### Description

A vulnerability in the key-based SSH authentication feature of Cisco StarOS Software could allow an authenticated, remote attacker to elevate privileges on an affected device.

 This vulnerability is due to insufficient validation of user-supplied credentials. An attacker could exploit this vulnerability by sending a valid low-privileged SSH key to an affected device from a host that has an IP address that is configured as the source for a high-privileged user account. A successful exploit could allow the attacker to log in to the affected device through SSH as a high-privileged user.

   There are workarounds that address this vulnerability.

### POC

#### Reference
- https://github.com/orangecertcc/security-research/security/advisories/GHSA-j7p3-gjw6-pp4r
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-staros-ssh-privesc-BmWeJC3h

#### Github
No PoCs found on GitHub currently.