CVE-2020-27534

MEDIUM severity · CVSS 5.3 · Path traversal

5.3CVSS MEDIUM

Summary

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.

Impact & exploitability

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

Confidentiality impactLow

Integrity impactNone

Availability impactNone

Exploit probability (EPSS)1%

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected products we track (1)

Docker Engine

Recommendation

Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.

Additional information

NVD record
http://web.archive.org/web/20200530054359/https://docs.docker.com/engine/release-notes/Advisory
https://github.com/moby/buildkit/pull/1462Advisory
https://github.com/moby/moby/pull/40877Advisory
https://golang.org/pkg/io/ioutil/#TempDirAdvisory
https://golang.org/pkg/os/#TempDirAdvisory
http://web.archive.org/web/20200530054359/https://docs.docker.com/engine/release-notes/Advisory
https://github.com/moby/buildkit/pull/1462Advisory
https://github.com/moby/moby/pull/40877Advisory