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Vulnerability record · CVE-2011-3374 · published 26 November 2019

CVE-2011-3374: Debian advanced package tool improper verification of cryptographic signature vulnerability

Debian · Advanced Package Tool

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.

3.7 CVSS 3.1 Low EPSS 1.2% · top 33.3% CWE-347 · Improper verification of cryptographic signature
3.7CVSS 3.1 base score, v2 4.3
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
14References, 2 tagged exploit
16 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://access.redhat.com/security/cve/cve-2011-3374 Broken Link
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=642480 Issue TrackingMailing ListThird Party Advisory
https://people.canonical.com/~ubuntu-security/cve/2011/CVE-2011-3374.html Third Party Advisory
https://seclists.org/fulldisclosure/2011/Sep/221 ExploitMailing ListThird Party Advisory
https://security-tracker.debian.org/tracker/CVE-2011-3374 Third Party Advisory
https://snyk.io/vuln/SNYK-LINUX-APT-116518 Broken Link
https://ubuntu.com/security/CVE-2011-3374 Third Party Advisory
https://access.redhat.com/security/cve/cve-2011-3374 Broken Link
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=642480 Issue TrackingMailing ListThird Party Advisory
https://people.canonical.com/~ubuntu-security/cve/2011/CVE-2011-3374.html Third Party Advisory
https://seclists.org/fulldisclosure/2011/Sep/221 ExploitMailing ListThird Party Advisory
https://security-tracker.debian.org/tracker/CVE-2011-3374 Third Party Advisory
https://snyk.io/vuln/SNYK-LINUX-APT-116518 Broken Link
https://ubuntu.com/security/CVE-2011-3374 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2011-3374), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.