title: Exploitation Indicators Of CVE-2023-20198
id: 2ece8816-b7a0-4d9b-b0e8-ae7ad18bc02b
status: test
description: Detecting exploitation indicators of CVE-2023-20198 a privilege escalation vulnerability in Cisco IOS XE Software Web UI.
references:
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-webui-privesc-j22SaA4z
- https://www.thestack.technology/security-experts-call-for-incident-response-exercises-after-mass-cisco-device-exploitation/
author: Lars B. P. Frydenskov (Trifork Security)
date: 2023-10-20
tags:
- attack.privilege-escalation
- attack.initial-access
- detection.emerging-threats
logsource:
product: cisco
service: syslog
definition: 'Requirements: Cisco IOS XE system logs needs to be configured and ingested'
detection:
keyword_event:
- '%WEBUI-6-INSTALL_OPERATION_INFO:'
- '%SYS-5-CONFIG_P:'
- '%SEC_LOGIN-5-WEBLOGIN_SUCCESS:'
keyword_user:
- 'cisco_tac_admin'
- 'cisco_support'
- 'cisco_sys_manager'
condition: keyword_event and keyword_user
falsepositives:
- Rare false positives might occur if there are valid users named "cisco_tac_admin" or "cisco_support", which are not created by default or CISCO representatives
level: high