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CVE-2016-20021

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Date: January 11, 2024

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.

Severity Score

Related Resources (9)

https://github.com/gentoo/portage
https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=5b3c80502e96406b4b175e2ee79eb65f3f3cd9f6
https://nvd.nist.gov/vuln/detail/CVE-2016-20021
https://gitweb.gentoo.org/proj/portage.git/tree/NEWS
https://github.com/gentoo/portage/commit/28cd240fb23d880b8641a058831c6762db71c3e2
https://bugs.gentoo.org/597800
https://github.com/pypa/advisory-database/tree/main/vulns/portage/PYSEC-2024-10.yaml
https://wiki.gentoo.org/wiki/Portage
https://www.mend.io/vulnerability-database/CVE-2016-20021

Severity Score

Weakness Type (CWE)

Improper Verification of Cryptographic Signature

CWE-347

Top Fix

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Upgrade to version portage - 3.0.47

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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): HIGH
Integrity (I): HIGH
Availability (A): HIGH

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