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CVE-2016-20021

Gentoo Portage vulnerability

9.8 CRITICALEPSS 0.47%
  1. Published12 Jan 2024

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Gentoo Portage< 3.0.47

Remediation

Fixed in
Gentoo Portage≥ 3.0.47
Patch & vendor advisories

References

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Frequently asked

Is CVE-2016-20021 being actively exploited?

CVE-2016-20021 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.47%.

How severe is CVE-2016-20021?

CVE-2016-20021 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.47% probability of exploitation.

Which products are affected by CVE-2016-20021?

Affected products include Gentoo Portage.

How do I fix CVE-2016-20021?

Upgrade affected software to a fixed version, for example Gentoo Portage 3.0.47 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.