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Vulnerability record · CVE-2011-3634 · published 1 March 2014

CVE-2011-3634: Debian advanced package tool information exposure vulnerability

Debian · Advanced Package Tool

methods/https.cc in apt before 0.8.11 accepts connections when the certificate host name fails validation and Verify-Host is enabled, which allows man-in-the-middle attackers to obtain repository credentials via unspecified vectors.

2.6 CVSS 2.0 Low EPSS 0.82% · top 44.7% CWE-200 · Information exposure
2.6CVSS 2.0 base score
0.82%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
8References
16 Jun 2026Last modified by NVD

Description

methods/https.cc in apt before 0.8.11 accepts connections when the certificate host name fails validation and Verify-Host is enabled, which allows man-in-the-middle attackers to obtain repository credentials via unspecified vectors.

AV:N/AC:H/Au:N/C:P/I:N/A:N

Affected products

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

References

LinkTags
http://people.canonical.com/~ubuntu-security/cve/2011/CVE-2011-3634.html
http://www.ubuntu.com/usn/USN-1283-1
https://alioth.debian.org/plugins/scmgit/cgi-bin/gitweb.cgi?p=apt/apt.git%3Ba=blob%3Bf=debian/changelog%3Bhb=HEAD
https://bugs.launchpad.net/ubuntu/+source/apt/+bug/868353
http://people.canonical.com/~ubuntu-security/cve/2011/CVE-2011-3634.html
http://www.ubuntu.com/usn/USN-1283-1
https://alioth.debian.org/plugins/scmgit/cgi-bin/gitweb.cgi?p=apt/apt.git%3Ba=blob%3Bf=debian/changelog%3Bhb=HEAD
https://bugs.launchpad.net/ubuntu/+source/apt/+bug/868353

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Source: NIST National Vulnerability Database (record CVE-2011-3634), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.