{"id":"CVE-2009-2730","url":"https://www.cyber-defence.io/tools/cve/CVE-2009-2730","generatedAt":"2026-10-27T18:44:36.139Z","title":"libgnutls in GnuTLS before 2.8.2 does not properly handle a '\\0' character in a domain name in the subject's (1) Common Name (CN) or (2) Subject Alternative Name (SAN) field of an X.509 certificate, which allows man-in-the-middle attackers to spoof…","description":"libgnutls in GnuTLS before 2.8.2 does not properly handle a '\\0' character in a domain name in the subject's (1) Common Name (CN) or (2) Subject Alternative Name (SAN) 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.","published":"2009-08-12T10:30:01.000Z","lastModified":"2026-06-16T23:10:07.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"2.0","score":7.5,"severity":"HIGH","vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P"},"cwe":["CWE-310"],"affected":["gnu/gnutls"],"epss":{"score":0.02151,"percentile":0.82013,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (2.15%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://article.gmane.org/gmane.network.gnutls.general/1733","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2009-09/msg00001.html","source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/36266","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/36496","source":"cve@mitre.org"},{"url":"http://www.openwall.com/lists/oss-security/2009/08/14/6","source":"cve@mitre.org"},{"url":"http://www.redhat.com/support/errata/RHSA-2009-1232.html","source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/archive/1/507985/100/0/threaded","source":"cve@mitre.org"},{"url":"http://www.securitytracker.com/id?1022777","source":"cve@mitre.org"},{"url":"http://www.vmware.com/security/advisories/VMSA-2009-0016.html","source":"cve@mitre.org"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/52404","source":"cve@mitre.org"},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10778","source":"cve@mitre.org"},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8409","source":"cve@mitre.org"},{"url":"https://rhn.redhat.com/errata/RHSA-2010-0095.html","source":"cve@mitre.org"},{"url":"http://article.gmane.org/gmane.network.gnutls.general/1733","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2009-09/msg00001.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/36266","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/36496","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2009/08/14/6","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.redhat.com/support/errata/RHSA-2009-1232.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/archive/1/507985/100/0/threaded","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id?1022777","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.vmware.com/security/advisories/VMSA-2009-0016.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/52404","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10778","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8409","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://rhn.redhat.com/errata/RHSA-2010-0095.html","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2009-2730","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}