CVE-2016-20021

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.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 0.04%
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://wiki.gentoo.org/wiki/Portage product
https://gitweb.gentoo.org/proj/portage.git/tree/NEWS release notes
https://bugs.gentoo.org/597800 issue tracking patch

Frequently Asked Questions

What is the severity of CVE-2016-20021?
CVE-2016-20021 has been scored as a critical severity vulnerability.
How to fix CVE-2016-20021?
To fix CVE-2016-20021, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2016-20021 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2016-20021 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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