CVE-2016-20021

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
mitreCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 10%
VendorProductVersion
gentooportage
𝑥
< 3.0.47
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://bugs.gentoo.org/597800
https://gitweb.gentoo.org/proj/portage.git/tree/NEWS
https://wiki.gentoo.org/wiki/Portage
https://bugs.gentoo.org/597800
https://gitweb.gentoo.org/proj/portage.git/tree/NEWS
https://wiki.gentoo.org/wiki/Portage