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https://github.com/splunk/security_content
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Rod Soto
54 lines
2.3 KiB
YAML
54 lines
2.3 KiB
YAML
name: Splunk protocol impersonation weak encryption selfsigned
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id: c76c7a2e-df49-414a-bb36-dce2683770de
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version: 1
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date: '2022-05-26'
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author: Rod Soto, Splunk
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type: Hunting
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datamodel: []
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search: '`splunkd` certificate event_message="X509 certificate* should not be used*" | stats count by host CN component log_level | `splunk_protocol_impersonation_weak_encryption_selfsigned_filter`'
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description: On June 14th 2022, Splunk released vulnerability advisory addresing Python TLS validation which was not set before Splunk version 9. This search displays events showing WARNING of using Splunk issued default selfsigned certificates.
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how_to_implement: Must upgrade to Splunk version 9 and Configure TLS in order to apply this search. Splunk SOAR customers can find a SOAR workbook that walks an analyst through the process of running these hunting searches in the references list of this detection. In order to use this workbook, a user will need to run a curl command to post the file to their SOAR instance such as "curl -u username:password https://soar.instance.name/rest/rest/workbook_template -d @splunk_psa_0622.json". A user should then create an empty container or case, attach the workbook, and begin working through the tasks.
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known_false_positives: This searches finds self signed certificates issued by Splunk which are not recommended from Splunk version 9 forward.
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references:
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- https://www.splunk.com/en_us/product-security
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- https://docs.splunk.com/Documentation/Splunk/9.0.0/Security/EnableTLSCertHostnameValidation
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- https://www.github.com/splunk/security_content/blob/develop/workbooks/splunk_psa_0622.json
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tags:
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analytic_story:
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- Splunk Vulnerabilities
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asset_type: Endpoint
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cis20:
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- CIS 3
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- CIS 5
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- CIS 16
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cve:
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- CVE-2022-32152
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confidence: 80
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context:
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- Source:Endpoint
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dataset:
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- https://raw.githubusercontent.com/splunk/attack_data/master/datasets/attack_techniques/T1558.004/splunk_protocol_impersonation_weak_encryption_selfsigned.txt
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impact: 50
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kill_chain_phases:
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- Exploitation
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message: Splunk default issued certificate at $host$
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mitre_attack_id:
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- T1588.004
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nist:
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- DE.CM
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observable:
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- name: Hostname
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type: Hostname
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role:
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- Victim
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product:
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- Splunk Enterprise
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- Splunk Enterprise Security
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- Splunk Cloud
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required_fields:
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- host
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- CN
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- event_message
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risk_score: 40
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security_domain: threat
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