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Nuclei Templates

Unshare - Privilege Escalation

ID: privesc-unshare

Severity: high

Author: daffainfo

Tags: code,linux,unshare,privesc,local

Description

Section titled “Description”

The unshare command is used to run a command in a new namespace, which can isolate various aspects of the system, such as the mount namespace, network namespace, user namespace, and more.

YAML Source

Section titled “YAML Source”
id: privesc-unshare


info:
  name: Unshare - Privilege Escalation
  author: daffainfo
  severity: high
  description: |
    The unshare command is used to run a command in a new namespace, which can isolate various aspects of the system, such as the mount namespace, network namespace, user namespace, and more.
  reference:
    - https://gtfobins.github.io/gtfobins/unshare/
  metadata:
    verified: true
    max-request: 3
  tags: code,linux,unshare,privesc,local


self-contained: true
code:
  - engine:
      - sh
      - bash
    source: |
      whoami


  - engine:
      - sh
      - bash
    source: |
      unshare whoami


  - engine:
      - sh
      - bash
    source: |
      sudo unshare whoami


    matchers-condition: and
    matchers:
      - type: word
        part: code_1_response
        words:
          - "root"
        negative: true


      - type: dsl
        dsl:
          - 'contains(code_2_response, "root")'
          - 'contains(code_3_response, "root")'
        condition: or
# digest: 4a0a0047304502204c00cedda6e892a30844593aca5a22e84ae11b8d8383d06af014137ec8d68e4f022100d99adbe5ea3920d2725643d58675088fb1102e44bad61f185f4db4370645e9c5:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

Section titled “Guide to check the vulnerabilities”

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

Terminal window
$ nuclei -u "URL" -t "code/privilege-escalation/linux/binary/privesc-unshare.yaml"

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