CVE-2023-20273 — Cisco IOS XE Web UI Command Injection Vulnerability
CVE-2023-20273: Cisco IOS XE Web UI Command Injection Vulnerability
CISA Known Exploited Vulnerability (KEV)
| Vendor / project | Cisco |
| Product | Cisco IOS XE Web UI |
| Date added | 2023-10-23 |
| Due date | 2023-10-27 |
| Ransomware campaign use | Unknown |
Description
Cisco IOS XE contains a command injection vulnerability in the web user interface. When chained with CVE-2023-20198, the attacker can leverage the new local user to elevate privilege to root and write the implant to the file system. Cisco identified CVE-2023-20273 as the vulnerability exploited to deploy the implant. CVE-2021-1435, previously associated with the exploitation events, is no longer believed to be related to this activity.
Required action (CISA)
Verify that instances of Cisco IOS XE Web UI are in compliance with BOD 23-02 and apply mitigations per vendor instructions. For affected products (Cisco IOS XE Web UI exposed to the internet or to untrusted networks), follow vendor instructions to determine if a system may have been compromised and immediately report positive findings to CISA.
Notes
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-webui-privesc-j22SaA4z; https://nvd.nist.gov/vuln/detail/CVE-2023-20273
References
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-20273
- KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog