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Description

This search detects the heap-based buffer overflow of sudoedit

  • Type: TTP
  • Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
  • Datamodel:
  • Last Updated: 2021-01-27
  • Author: Shannon Davis, Splunk
  • ID: 93fbec4e-0375-440c-8db3-4508eca470c4

ATT&CK

ID Technique Tactic
T1068 Exploitation for Privilege Escalation Privilege Escalation
`linux_hosts` 
| search "sudoedit -s \\" 
| `detect_baron_samedit_cve_2021_3156_filter`

Associated Analytic Story

How To Implement

Splunk Universal Forwarder running on Linux systems, capturing logs from the /var/log directory. The vulnerability is exposed when a non privledged user tries passing in a single \ character at the end of the command while using the shell and edit flags.

Required field

  • _time

Kill Chain Phase

  • Exploitation

Known False Positives

unknown

CVE

ID Summary CVSS
CVE-2021-3156 Sudo before 1.9.5p2 contains an off-by-one error that can result in a heap-based buffer overflow, which allows privilege escalation to root via "sudoedit -s" and a command-line argument that ends with a single backslash character. 7.2

Reference

Test Dataset

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

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