جزئیات آسیب‌پذیری

cal.com (calcom repository, later renamed cal.diy) is affected by a repository takeover vulnerability in its GitHub Actions workflows. The workflow pr.yml uses the pull_request_target trigger with the repository's default write permissions and passes them down to check-types.yml. check-types.yml then performs a 'dangerous' checkout of the attacker-submitted pull request code (via the dangerous-git-checkout action) and subsequently executes it (through yarn install and package.json scripts). An attacker can open a pull request whose code runs arbitrary commands with the repository's write-scoped GITHUB_TOKEN, allowing them to push commits, merge or mutate pull requests, add or delete comments, and delete or force-push branches, thereby compromising the repository. The main branch is affected; no patched version is available.

• https://github.com/calcom/cal.diy/commit/9aa60fae41a6b6b101c86bf430754b439f440871 patch
• https://www.vulncheck.com/advisories/cal-com-repository-takeover-via-pull-request-target-workflow third-party-advisory
• https://github.com/calcom/cal.diy/security/advisories/GHSA-p3f6-52gv-cj7m vendor-advisory