5.3

CVSS Score

3.1

-

CVSS Score

Basic Information

CVE ID

CVE-2020-27534

GHSA ID

GHSA-6hwg-w5jg-9c6x

EPSS Score

0.72539%

CWE

CWE-22

Published

1/31/2024

Updated

4/22/2024

KEV Status

Technology

Basic Information

CVE ID

GHSA ID

EPSS Score

CWE

Published

Updated

KEV Status

Technology

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CVE-2020-27534

CVE-2020-27534: Path Traversal in Moby builder

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.

(GitHub Advisory)

Miggo Vulnerability Database

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CVE-2020-27534

CVE-2020-27534:

5.3

CVSS Score

3.1

-

CVSS Score

Basic Information

CVE ID

CVE-2020-27534

GHSA ID

GHSA-6hwg-w5jg-9c6x

EPSS Score

0.72539%

CWE

CWE-22

Published

1/31/2024

Updated

4/22/2024

KEV Status

Technology

Basic Information

CVE ID

GHSA ID

EPSS Score

CWE

Published

Updated

KEV Status

Technology

Technical Details

CVSS Vector

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

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
github.com/moby/moby	go	< 19.03.9	19.03.9
github.com/docker/docker	go	< 19.03.9	19.03.9

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability stems from insecure temporary file handling in Docker's binfmt_misc check implementation. The key vulnerable function is identified as checkBinfmtMisc in util/binfmt_misc/check.go, where:

ioutil.TempDir was called with an empty directory prefix argument, creating temporary files in the system's default temp location
The generated path was passed to os.OpenFile without proper validation
This pattern matches the CVE description of 'potentially unsafe qemu-check temporary pathname'
The patch (moby/moby#40877) would have modified this TempDir call to use a secure directory prefix
This function would appear in runtime profiles during binfmt_misc checks when processing container architectures

Vulnerable functions

Only Mi**o us*rs **n s** t*is s**tion

WAF Protection Rules

WAF Rule

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Reasoning

*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.

5.3

-

Basic Information

Basic Information

Concerned about an active attack path?

CVE-2020-27534: Path Traversal in Moby builder

CVE-2020-27534:

5.3

-

Basic Information

Basic Information

Technical Details

Technical Details

Vulnerability IntelligenceMiggo AI

Root Cause Analysis

Vulnerable functions

WAF Protection Rules

WAF Rule

Reasoning

Vulnerability IntelligenceMiggo AI

CVE-2020-27534: Path Traversal in Moby builder

Vulnerability IntelligenceMiggo AI

Root Cause Analysis

Vulnerable functions

WAF Protection Rules

WAF Rule

Reasoning

Basic Information

Basic Information

Technical Details

5.3

5.3

Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
Miggo AI