It was found that apt-key in apt, all versions, do not correctly validate gpg keys with the master keyring, leading to a potential man-in-the-middle attack.
https://ubuntu.com/security/CVE-2011-3374
https://security-tracker.debian.org/tracker/CVE-2011-3374
https://people.canonical.com/~ubuntu-security/cve/2011/CVE-2011-3374.html
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=642480
https://snyk.io/vuln/SNYK-LINUX-APT-116518
https://seclists.org/fulldisclosure/2011/Sep/221
https://euvd.enisa.europa.eu/vulnerability/EUVD-2011-3338
https://access.redhat.com/security/cve/cve-2011-3374
Source: Mitre, NVD
Published: 2019-11-26
Updated: 2021-02-09
Base Score: 4.3
Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N
Severity: Medium
Base Score: 3.7
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Severity: Low
EPSS: 0.01191