JS Recon is a JavaScript enumeration and SAST tool. From 1.2.1-beta.1 until 1.3.1-beta.2, the PR Branch Checker workflow in .github/workflows/pr_checker.yml places github.head_ref and github.event.pull_request.head.repo.full_name into BRANCH_NAME and SOURCE_REPO and interpolates those untrusted values into a shell gh pr comment command. A remote user who opens a pull request can use shell metacharacters in a branch or fork name to execute commands in the GitHub Actions runner with the workflow's GITHUB_TOKEN, which has pull-requests write permission.
This issue is fixed in version 1.3.1-beta.2.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 4
https://github.com/js-recon/js-recon/commit/447876c4bfa9ec5bc98cbc65d7a3e5f8894…
security-advisories@github.com
https://github.com/js-recon/js-recon/pull/121
security-advisories@github.com
https://github.com/js-recon/js-recon/releases/tag/v1.3.1-beta.2
security-advisories@github.com
https://github.com/js-recon/js-recon/security/advisories/GHSA-w9cj-mg3x-qjm4
security-advisories@github.com