CVE-2016-20021

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Published Jan 12, 2024 CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed

Description

In Gentoo Portage before 3.0.47, there is missing PGP validation of executed code: the standalone emerge-webrsync downloads a .gpgsig file but does not perform signature verification. Unless emerge-webrsync is used, Portage is not vulnerable.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

cpe:2.3:a:gentoo:portage:*:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source	ID	Title
EUVD	EUVD-2024-0149	In Gentoo Portage before 3.0.47, there is missing PGP validation of executed code: the standalone emerge-webrsync downloads a .gpgsig file but does not perform signature verification. Unless emerge-webrsync is used, Portage is not vulnerable.
Github GHSA	GHSA-pw5x-x5jw-ccmh	Gentoo Portage missing PGP validation of executed code

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.464% probability within 30 days)

Exploitation none

Automatable yes

Technical Impact total

References

Link	Providers
https://bugs.gentoo.org/597800
https://gitweb.gentoo.org/proj/portage.git/tree/NEWS
https://wiki.gentoo.org/wiki/Portage

History

Jun 3, 2025 2:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Subscriptions

Gentoo Portage

Weaknesses

CWE-347

Sources

CVE record Updated: Jun 3, 2025, 2:07 PM

Status: PUBLISHED
Assigner: mitre
Published: Jan 12, 2024, 12:00 AM
Updated: Jun 3, 2025, 2:07 PM
Reserved: Jan 12, 2024, 12:00 AM

View source JSON

Vulnrichment Updated: Aug 6, 2024, 3:47 AM

Updated: Aug 6, 2024, 3:47 AM

NVD Updated: Jun 17, 2026, 12:43 AM

Status: Modified
Published: Jan 12, 2024, 3:15 AM
Modified: Jun 17, 2026, 12:43 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

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