fish - Privilege Escalation

ID: privesc-fish

Severity: high

Author: daffainfo

Tags: code,linux,fish,privesc,local

Description

fish is a user-friendly command-line shell for Unix-like operating systems. It provides features such as syntax highlighting, autosuggestions, and a built-in scripting language. Fish aims to be easy to use and learn, making it a popular choice for both interactive shell usage and scripting.

YAML Source

id: privesc-fish

info:
  name: fish - Privilege Escalation
  author: daffainfo
  severity: high
  description: |
    fish is a user-friendly command-line shell for Unix-like operating systems. It provides features such as syntax highlighting, autosuggestions, and a built-in scripting language. Fish aims to be easy to use and learn, making it a popular choice for both interactive shell usage and scripting.
  reference:
    - https://gtfobins.github.io/gtfobins/fish/
  metadata:
    verified: true
    max-request: 3
  tags: code,linux,fish,privesc,local

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

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

  - engine:
      - sh
      - bash
    source: |
      sudo fish -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: 4a0a0047304502205022eaaf352eb396f94084afb5f447ec41826e7546ee1768f0ccddd95a7f463e022100e9298ebeac5866aa6c3157ca4a363f35917b7f0be12078031245c5d87a38f4e2:922c64590222798bb761d5b6d8e72950

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-fish.yaml"

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