Detection rules › Sigma
CVE-2023-22518 Exploitation Attempt - Vulnerable Endpoint Connection (Proxy)
Detects exploitation attempt of CVE-2023-22518 (Confluence Data Center / Confluence Server), where an attacker can exploit vulnerable endpoints to e.g. create admin accounts and execute arbitrary commands.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Initial Access | T1190 Exploit Public-Facing Application |
Rule body yaml
title: CVE-2023-22518 Exploitation Attempt - Vulnerable Endpoint Connection (Proxy)
id: 27d2cdde-9778-490e-91ec-9bd0be6e8cc6
related:
- id: a902d249-9b9c-4dc4-8fd0-fbe528ef965c
type: similar
status: test
description: |
Detects exploitation attempt of CVE-2023-22518 (Confluence Data Center / Confluence Server), where an attacker can exploit vulnerable endpoints to e.g. create admin accounts and execute arbitrary commands.
references:
- https://confluence.atlassian.com/security/cve-2023-22518-improper-authorization-vulnerability-in-confluence-data-center-and-server-1311473907.html
- https://www.huntress.com/blog/confluence-to-cerber-exploitation-of-cve-2023-22518-for-ransomware-deployment
- https://github.com/ForceFledgling/CVE-2023-22518
author: Andreas Braathen (mnemonic.io)
date: 2023-11-14
tags:
- attack.initial-access
- attack.t1190
- cve.2023-22518
- detection.emerging-threats
logsource:
category: proxy
detection:
selection_method:
cs-method: 'POST'
selection_uris:
cs-uri|contains:
# Exploitable endpoints
- '/json/setup-restore-local.action'
- '/json/setup-restore-progress.action'
- '/json/setup-restore.action'
- '/server-info.action'
- '/setup/setupadministrator.action'
selection_status:
# Response code may be indicative of exploitation success, but is not always the case
sc-status:
- 200
- 302
- 405
condition: all of selection_*
falsepositives:
- Vulnerability scanners
level: medium
Stages and Predicates
Stage 0: condition
all of selection_*Stage 1: selection_method
selection_method:
cs-method: 'POST'
Stage 2: selection_uris
selection_uris:
cs-uri|contains:
- '/json/setup-restore-local.action'
- '/json/setup-restore-progress.action'
- '/json/setup-restore.action'
- '/server-info.action'
- '/setup/setupadministrator.action'
Stage 3: selection_status
selection_status:
sc-status:
- 200
- 302
- 405
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.