WARNING THIS IS A EXPERIMENTAL object
We have not been able to test, simulate, or build datasets for this object. Use at your own risk. This analytic is NOT supported.
This search detects the heap-based buffer overflow of sudoedit
- Type: TTP
Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
- Last Updated: 2021-01-29
- Author: Shannon Davis, Splunk
- ID: 10f2bae0-bbe6-4984-808c-37dc1c67980d
|T1068||Exploitation for Privilege Escalation||Privilege Escalation|
Kill Chain Phase
- CIS 8
- CIS 12
- CIS 16
1 2 3 4 5 `linux_hosts` | search sudoedit segfault | stats count min(_time) as firstTime max(_time) as lastTime by host | search count > 5 | `detect_baron_samedit_cve_2021_3156_segfault_filter`
The SPL above uses the following Macros:
Note that detect_baron_samedit_cve-2021-3156_segfault_filter is a empty macro by default. It allows the user to filter out any results (false positives) without editing the SPL.
How To Implement
Splunk Universal Forwarder running on Linux systems (tested on Centos and Ubuntu), where segfaults are being logged. This also captures instances where the exploit has been compiled into a binary. The detection looks for greater than 5 instances of sudoedit combined with segfault over your search time period on a single host
Known False Positives
If sudoedit is throwing segfaults for other reasons this will pick those up too.
Associated Analytic story
source | version: 1