{"cve":"CVE-2011-3634","nvd":{"published":"2014-03-01T00:55:04.857","modified":"2026-06-16T23:33:39.827","status":"Modified","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.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-200"],"references":["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"],"products":["canonical:ubuntu_linux","debian:advanced_package_tool"],"source":"nvd","synced_at":"2026-10-19T20:32:06.812358378+00:00"},"epss":{"cve":"CVE-2011-3634","score":0.00815,"percentile":0.57069,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}