GHSA-hfg8-hc9c-6c3h

Dashboard / Vulnerabilities / GHSA-hfg8-hc9c-6c3h

GHSA-hfg8-hc9c-6c3h

Summary: moby/go-archive: Crafted tar archive can write outside the extraction directory

Details: ### Summary The tar extraction routines in `moby/go-archive` (`Unpack`, `UnpackLayer`, `Untar`/`UntarUncompressed`, and the `ApplyLayer` helpers) do not confine filesystem operations to the destination directory. A crafted archive can create or overwrite files **outside** the intended destination. ### Details The extractor decides where each archive entry lands using lexical string checks and then performs the filesystem operation on a path that is resolved by the OS, so a links introduced by the archive can be followed out of the destination directory. ### Impact An attacker who controls the contents of archive can create or overwrite files at arbitrary paths writable by the extracting process. ### Workarounds Only extract trusted archives.

References: https://github.com/moby/go-archive/security/advisories/GHSA-hfg8-hc9c-6c3h, https://github.com/moby/moby/issues/52948, https://docs.docker.com/desktop/release-notes/#4860, https://github.com/bikini/exploitarium/tree/main/docker-cp-copyout-destination-escape, https://github.com/docker/cli/releases/tag/v29.7.0, https://github.com/moby/go-archive, https://github.com/moby/moby/releases/tag/docker-v29.7.0, https://www.imperva.com/blog/copyescape-taking-over-docker-hosts-with-docker-cp