ID | Technique | Tactic |
---|---|---|
T1190 | Exploit Public-Facing Application | Initial Access |
T1133 | External Remote Services | Initial Access |
Detection: F5 BIG-IP iControl REST Vulnerability CVE-2022-1388
Description
The following analytic detects attempts to exploit the F5 BIG-IP iControl REST API vulnerability (CVE-2022-1388) for unauthenticated remote code execution. It identifies suspicious URI paths and POST HTTP methods, along with specific request headers containing potential commands in the utilcmdargs
field and a random base64 encoded value in the X-F5-Auth-Token
field. This activity is significant as it targets a critical vulnerability that can allow attackers to execute arbitrary commands on the affected system. If confirmed malicious, this could lead to full system compromise and unauthorized access to sensitive data.
Search
1
2| tstats count from datamodel=Web where Web.url="*/mgmt/tm/util/bash*" Web.http_method="POST" by Web.http_user_agent Web.http_method, Web.url,Web.url_length Web.src, Web.dest
3| `drop_dm_object_name("Web")`
4| `security_content_ctime(firstTime)`
5| `security_content_ctime(lastTime)`
6| `f5_big_ip_icontrol_rest_vulnerability_cve_2022_1388_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($field$) |
f5_big_ip_icontrol_rest_vulnerability_cve_2022_1388_filter | search * |
f5_big_ip_icontrol_rest_vulnerability_cve_2022_1388_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 Notable | Yes |
Rule Title | %name% |
Rule Description | %description% |
Notable Event Fields | user, dest |
Creates Risk Event | True |
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 CVE-2022-1388 against an F5 appliance $dest$ has occurred. | 70 | 100 | 70 |
References
-
https://github.com/dk4trin/templates-nuclei/blob/main/CVE-2022-1388.yaml
-
https://www.randori.com/blog/vulnerability-analysis-cve-2022-1388/
-
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-1388
-
https://twitter.com/da_667/status/1523770267327250438?s=20&t=-JnB_aNWuJFsmcOmxGUWLQ
-
https://github.com/horizon3ai/CVE-2022-1388/blob/main/CVE-2022-1388.py
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