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CVE-2020-27534

Good to know:

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Date: December 30, 2020

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.

Language: Go

Severity Score

Related Resources (9)

https://github.com/moby/moby/pull/40877
https://golang.org/pkg/io/ioutil/#TempDir
https://golang.org/pkg/os/#TempDir
https://github.com/moby/buildkit/pull/1462
https://nvd.nist.gov/vuln/detail/CVE-2020-27534
http://web.archive.org/web/20200530054359/https://docs.docker.com/engine/release-notes/
http://web.archive.org/web/20200530054359/https://docs.docker.com/engine/release-notes
https://bugzilla.redhat.com/show_bug.cgi?id=1921154
https://www.mend.io/vulnerability-database/CVE-2020-27534

Severity Score

Weakness Type (CWE)

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CWE-22

Top Fix

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Upgrade Version

Upgrade to version github.com/moby/moby - v19.03.9;github.com/docker/docker - v19.03.9

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): NONE
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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