CVE-2020-27534: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

January 31, 2024

util/binfmt_misc/check.go in Builder in Docker Engine before 19.03.9 calls os.OpenFile with a potentially unsafe qemu-check temporary pathname, constructed with an empty first argument in an ioutil.TempDir call.

References

web.archive.org/web/20200530054359/https://docs.docker.com/engine/release-notes/
bugzilla.redhat.com/show_bug.cgi?id=1921154
github.com/advisories/GHSA-6hwg-w5jg-9c6x
github.com/moby/buildkit/pull/1462
github.com/moby/moby/pull/40877
nvd.nist.gov/vuln/detail/CVE-2020-27534

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