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.
Sigma rule (View on GitHub)
1title: CVE-2023-22518 Exploitation Attempt - Vulnerable Endpoint Connection (Proxy)
2id: 27d2cdde-9778-490e-91ec-9bd0be6e8cc6
3related:
4 - id: a902d249-9b9c-4dc4-8fd0-fbe528ef965c
5 type: similar
6status: experimental
7description: |
8 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.
9references:
10 - https://confluence.atlassian.com/security/cve-2023-22518-improper-authorization-vulnerability-in-confluence-data-center-and-server-1311473907.html
11 - https://www.huntress.com/blog/confluence-to-cerber-exploitation-of-cve-2023-22518-for-ransomware-deployment
12 - https://github.com/ForceFledgling/CVE-2023-22518
13author: Andreas Braathen (mnemonic.io)
14date: 2023/11/14
15tags:
16 - detection.emerging_threats
17 - attack.initial_access
18 - attack.t1190
19 - cve.2023.22518
20logsource:
21 category: proxy
22detection:
23 selection_method:
24 cs-method: 'POST'
25 selection_uris:
26 cs-uri|contains:
27 # Exploitable endpoints
28 - '/json/setup-restore-local.action'
29 - '/json/setup-restore-progress.action'
30 - '/json/setup-restore.action'
31 - '/server-info.action'
32 - '/setup/setupadministrator.action'
33 selection_status:
34 # Response code may be indicative of exploitation success, but is not always the case
35 sc-status:
36 - 200
37 - 302
38 - 405
39 condition: all of selection_*
40falsepositives:
41 - Vulnerability scanners
42level: medium
References
-
Summary of Vulnerability 06 Nov 2023 As part of Atlassian's ongoing monitoring and investigation of this CVE, we observed several active exploits and reports of threat actors using ransomware. We ...
Read More -
CVE-2023-22518 is being exploited in Confluence for Cerber ransomware deployment. Read up on Huntress’ observations and mitigation guidance.
Read More -
Improper Authorization Vulnerability in Confluence Data Center and Server + bonus 🔥 - ForceFledgling/CVE-2023-22518
Read More
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