Critical severity · published Jan 12, 2024
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…
9.8
CVSS
0.5%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 40% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PO
Portage · Gentoo
before 3.0.47 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2016-20021
CVE.org
https://www.cve.org/CVERecord?id=CVE-2016-20021
Issue Tracking
https://bugs.gentoo.org/597800
Release Notes
https://gitweb.gentoo.org/proj/portage.git/tree/NEWS
Product
https://wiki.gentoo.org/wiki/Portage
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