{"id":"DEBIAN-CVE-2013-4238","details":"The ssl.match_hostname function in the SSL module in Python 2.6 through 3.4 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, a related issue to CVE-2009-2408.","modified":"2026-07-28T06:04:26.201322619Z","published":"2013-08-18T02:52:22.943Z","upstream":["CVE-2013-4238"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2013-4238"}],"affected":[{"package":{"name":"python2.7","ecosystem":"Debian:11","purl":"pkg:deb/debian/python2.7?arch=source&distro=bullseye"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.5-8"}]}],"ecosystem_specific":{"urgency":"low"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2013-4238.json"}}],"schema_version":"1.7.5"}