VMware Server Side Template Injection Hunt

Name:VMware Server Side Template Injection Hunt
id:5796b570-ad12-44df-b1b5-b7e6ae3aabb0
version:3
date:2024-10-17
author:Michael Haag, Splunk
status:production
type:Hunting
Description:The following analytic identifies potential server-side template injection attempts related to CVE-2022-22954. It detects suspicious URL patterns containing "deviceudid" and keywords like "java.lang.ProcessBuilder" or "freemarker.template.utility.ObjectConstructor" using web or proxy logs within the Web Datamodel. This activity is significant as it may indicate an attempt to exploit a known vulnerability in VMware, potentially leading to remote code execution. If confirmed malicious, attackers could gain unauthorized access, execute arbitrary code, and compromise the affected system, posing a severe security risk.
Data_source:

• -Palo Alto Network Threat

search:| tstats count from datamodel=Web where Web.http_method IN ("GET") Web.url="*deviceudid=*" AND Web.url IN ("*java.lang.ProcessBuilder*","*freemarker.template.utility.ObjectConstructor*") by Web.http_user_agent Web.http_method, Web.url,Web.url_length Web.src, Web.dest sourcetype
| `drop_dm_object_name("Web")`
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `vmware_server_side_template_injection_hunt_filter`

how_to_implement:To successfully implement this search, you need to be ingesting web or proxy logs, or ensure it is being filled by a proxy like device, into the Web Datamodel. For additional filtering, allow list private IP space or restrict by known good.
known_false_positives:False positives may be present if the activity is blocked or was not successful. Filter known vulnerablity scanners. Filter as needed.
References:
  -https://www.cisa.gov/uscert/ncas/alerts/aa22-138b
  -https://github.com/wvu/metasploit-framework/blob/master/modules/exploits/linux/http/vmware_workspace_one_access_cve_2022_22954.rb
  -https://github.com/sherlocksecurity/VMware-CVE-2022-22954
  -https://www.vmware.com/security/advisories/VMSA-2022-0011.html
  -https://attackerkb.com/topics/BDXyTqY1ld/cve-2022-22954/rapid7-analysis
  -https://twitter.com/wvuuuuuuuuuuuuu/status/1519476924757778433
drilldown_searches:
  :
tags:
  analytic_story:
    - 'VMware Server Side Injection and Privilege Escalation'
  asset_type:Web Server
  confidence:50
  cve:
    - 'CVE-2022-22954'
  impact:70
  message:An attempt to exploit a VMware Server Side Injection CVE-2022-22954 on $dest$ has occurred.
  mitre_attack_id:
    - 'T1190'
    - 'T1133'
  observable:
    name:'dest'
    type:'Hostname'
    - role:
      - 'Victim'
  product:
    - 'Splunk Enterprise'
    - 'Splunk Enterprise Security'
    - 'Splunk Cloud'
  required_fields:
    - 'Web.http_method'
    - 'Web.url'
    - 'Web.url_length'
    - 'Web.src'
    - 'Web.dest'
    - 'Web.http_user_agent'
  risk_score:35
  security_domain:network

tests:
 name:'True Positive Test'
 attack_data:
  data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1190/vmware/vmware_scanning_pan_threat.log
  source: pan:threat
  sourcetype: pan:threat
  update_timestamp: True
manual_test:None