Description
serverless-dns is a RethinkDNS resolver that deploys to Cloudflare Workers, Deno Deploy, Fastly, and Fly.io. Versions through abd including 0.1.30 have a vulnerability where the pr.yml GitHub Action interpolates in an unsafe manner untrusted input, specifically the github.event.pull_request.head.repo.clone_url and github.head_ref, to a command in the runner. Due to the action using the pull_request_target trigger it has permissive permissions by default. An unauthorized attacker can exploit this vulnerability to push arbitrary data to the repository. The subsequent impact on the end-user is executing the attackers' code when running serverless-dns. This is fixed in commit c5537dd, and expected to be released in 0.1.31.
Problem types
CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')
Product status
References
github.com/...ss-dns/security/advisories/GHSA-9g7x-737f-5xpc
github.com/...ommit/c5537dd7f203c59f2b86d1e295c2371f3533946a
