{"id":"DEBIAN-CVE-2013-4314","details":"The X509Extension in pyOpenSSL before 0.13.1 does not properly handle a '\\0' character in a domain name in the Subject Alternative Name field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority.","modified":"2026-09-01T20:03:18.196330454Z","published":"2013-09-30T21:55:09.583Z","upstream":["CVE-2013-4314"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2013-4314"}],"affected":[{"package":{"name":"pyopenssl","ecosystem":"Debian:12","purl":"pkg:deb/debian/pyopenssl?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.13-2.1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2013-4314.json"}},{"package":{"name":"pyopenssl","ecosystem":"Debian:13","purl":"pkg:deb/debian/pyopenssl?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.13-2.1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2013-4314.json"}},{"package":{"name":"pyopenssl","ecosystem":"Debian:14","purl":"pkg:deb/debian/pyopenssl?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.13-2.1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2013-4314.json"}}],"schema_version":"1.9.0"}