Bash - Privilege Escalation

ID: privesc-bash

Severity: high

Author: daffainfo

Tags: code,linux,bash,privesc,local

Description

Bash is a Unix shell and command language written by Brian Fox for the GNU Project as a free software replacement for the Bourne shell. The shell’s name is an acronym for Bourne Again Shell, a pun on the name of the Bourne shell that it replaces and the notion of being born again.

YAML Source

id: privesc-bash

info:
  name: Bash - Privilege Escalation
  author: daffainfo
  severity: high
  description: |
    Bash is a Unix shell and command language written by Brian Fox for the GNU Project as a free software replacement for the Bourne shell. The shell's name is an acronym for Bourne Again Shell, a pun on the name of the Bourne shell that it replaces and the notion of being born again.
  reference:
    - https://gtfobins.github.io/gtfobins/bash/
  metadata:
    verified: true
    max-request: 3
  tags: code,linux,bash,privesc,local

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

  - engine:
      - sh
      - bash
    source: |
      bash -c 'whoami'

  - engine:
      - sh
      - bash
    source: |
      sudo bash -c '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: 490a0046304402203a44708a03e25f2e08a676db45844be884224bf30910c57e1e236ad0bb93469202200eaf50837ac2d6dc23bc15b505fdfb7009286edabf66067d95e8865dfaa06a08:922c64590222798bb761d5b6d8e72950

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.

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

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