ID | Technique | Tactic |
---|---|---|
T1190 | Exploit Public-Facing Application | Initial Access |
T1133 | External Remote Services | Initial Access |
Detection: VMware Server Side Template Injection Hunt
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.
Search
1
2| 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
3| `drop_dm_object_name("Web")`
4| `security_content_ctime(firstTime)`
5| `security_content_ctime(lastTime)`
6| `vmware_server_side_template_injection_hunt_filter`
Data Source
Name | Platform | Sourcetype | Source |
---|---|---|---|
Palo Alto Network Threat | Network | 'pan:threat' |
'pan:threat' |
Macros Used
Name | Value |
---|---|
security_content_ctime | convert timeformat="%Y-%m-%dT%H:%M:%S" ctime($field$) |
vmware_server_side_template_injection_hunt_filter | search * |
vmware_server_side_template_injection_hunt_filter
is an empty macro by default. It allows the user to filter out any results (false positives) without editing the SPL.
Annotations
Default Configuration
This detection is configured by default in Splunk Enterprise Security to run with the following settings:
Setting | Value |
---|---|
Disabled | true |
Cron Schedule | 0 * * * * |
Earliest Time | -70m@m |
Latest Time | -10m@m |
Schedule Window | auto |
Creates Risk Event | False |
Implementation
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.
Associated Analytic Story
Risk Based Analytics (RBA)
Risk Message | Risk Score | Impact | Confidence |
---|---|---|---|
An attempt to exploit a VMware Server Side Injection CVE-2022-22954 on $dest$ has occurred. | 35 | 70 | 50 |
References
-
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
Detection Testing
Test Type | Status | Dataset | Source | Sourcetype |
---|---|---|---|---|
Validation | ✅ Passing | N/A | N/A | N/A |
Unit | ✅ Passing | Dataset | pan:threat |
pan:threat |
Integration | ✅ Passing | Dataset | pan:threat |
pan:threat |
Replay any dataset to Splunk Enterprise by using our replay.py
tool or the UI.
Alternatively you can replay a dataset into a Splunk Attack Range
Source: GitHub | Version: 3