CVE-2020-27534
MEDIUMCVSS 5.3/10EPSS 1.75%
Last modified
CVE-2020-27534 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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.. EPSS estimates a 1.75% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Docker | Docker | < 19.03.9 |
References
- http://web.archive.org/web/20200530054359/https://docs.docker.com/engine/release-notes/Release Notes, Third Party Advisory
- https://github.com/moby/buildkit/pull/1462Third Party Advisory
- https://github.com/moby/moby/pull/40877Third Party Advisory
- https://golang.org/pkg/io/ioutil/#TempDirThird Party Advisory
- https://golang.org/pkg/os/#TempDirThird Party Advisory
- http://web.archive.org/web/20200530054359/https://docs.docker.com/engine/release-notes/Release Notes, Third Party Advisory
- https://github.com/moby/buildkit/pull/1462Third Party Advisory
- https://github.com/moby/moby/pull/40877Third Party Advisory
- https://golang.org/pkg/io/ioutil/#TempDirThird Party Advisory
- https://golang.org/pkg/os/#TempDirThird Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-27534?
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.
How severe is CVE-2020-27534?
CVE-2020-27534 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.75% probability of exploitation in the next 30 days.
How do I fix CVE-2020-27534?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2020-27534?
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Scan your code nowSource: NVD / NIST