{"id":"CVE-2009-2409","url":"https://www.cyber-defence.io/tools/cve/CVE-2009-2409","generatedAt":"2026-10-27T18:33:37.771Z","title":"The Network Security Services (NSS) library before 3.12.3, as used in Firefox; GnuTLS before 2.6.4 and 2.7.4; OpenSSL 0.9.8 through 0.9.8k; and other products support MD2 with X.509 certificates, which might allow remote attackers to spoof certificates…","description":"The Network Security Services (NSS) library before 3.12.3, as used in Firefox; GnuTLS before 2.6.4 and 2.7.4; OpenSSL 0.9.8 through 0.9.8k; and other products support MD2 with X.509 certificates, which might allow remote attackers to spoof certificates by using MD2 design flaws to generate a hash collision in less than brute-force time.  NOTE: the scope of this issue is currently limited because the amount of computation required is still large.","published":"2009-07-30T19:30:00.000Z","lastModified":"2026-06-16T23:09:23.000Z","status":"Modified","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"2.0","score":5.1,"severity":"MEDIUM","vector":"AV:N/AC:H/Au:N/C:P/I:P/A:P"},"cwe":["CWE-295"],"affected":["gnu/gnutls","mozilla/network security services","openssl/openssl"],"epss":{"score":0.0427,"percentile":0.91022,"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":"low","text":"Lower severity and a low EPSS score (4.27%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://java.sun.com/j2se/1.5.0/ReleaseNotes.html","tags":["Patch"],"source":"secalert@redhat.com"},{"url":"http://java.sun.com/javase/6/webnotes/6u17.html","tags":["Release Notes"],"source":"secalert@redhat.com"},{"url":"http://lists.apple.com/archives/security-announce/2009/Nov/msg00000.html","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/36139","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/36157","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/36434","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/36669","tags":["Not Applicable"],"source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/36739","tags":["Not Applicable"],"source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/37386","tags":["Not Applicable"],"source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/42467","tags":["Not Applicable"],"source":"secalert@redhat.com"},{"url":"http://security.gentoo.org/glsa/glsa-200911-02.xml","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://security.gentoo.org/glsa/glsa-200912-01.xml","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://support.apple.com/kb/HT3937","tags":["Broken Link"],"source":"secalert@redhat.com"},{"url":"http://www.debian.org/security/2009/dsa-1874","tags":["Mailing List"],"source":"secalert@redhat.com"},{"url":"http://www.mandriva.com/security/advisories?name=MDVSA-2009:197","tags":["Not Applicable"],"source":"secalert@redhat.com"},{"url":"http://www.mandriva.com/security/advisories?name=MDVSA-2009:216","tags":["Not Applicable"],"source":"secalert@redhat.com"},{"url":"http://www.mandriva.com/security/advisories?name=MDVSA-2009:258","tags":["Not Applicable"],"source":"secalert@redhat.com"},{"url":"http://www.mandriva.com/security/advisories?name=MDVSA-2010:084","tags":["Not Applicable"],"source":"secalert@redhat.com"},{"url":"http://www.redhat.com/support/errata/RHSA-2009-1207.html","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.redhat.com/support/errata/RHSA-2009-1432.html","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.securityfocus.com/archive/1/515055/100/0/threaded","tags":["Broken Link"],"source":"secalert@redhat.com"},{"url":"http://www.securitytracker.com/id?1022631","tags":["Broken Link"],"source":"secalert@redhat.com"},{"url":"http://www.ubuntu.com/usn/usn-810-1","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.vmware.com/security/advisories/VMSA-2010-0019.html","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.vupen.com/english/advisories/2009/2085","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.vupen.com/english/advisories/2009/3184","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.vupen.com/english/advisories/2010/3126","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2009-2409","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"https://lists.balabit.com/pipermail/syslog-ng-announce/2011-January/000101.html","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"https://lists.balabit.com/pipermail/syslog-ng-announce/2011-January/000102.html","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10763","tags":["Broken Link"],"source":"secalert@redhat.com"},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6631","tags":["Broken Link"],"source":"secalert@redhat.com"},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7155","tags":["Broken Link"],"source":"secalert@redhat.com"},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8594","tags":["Broken Link"],"source":"secalert@redhat.com"},{"url":"https://rhn.redhat.com/errata/RHSA-2010-0095.html","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"https://usn.ubuntu.com/810-2/","tags":["Broken Link"],"source":"secalert@redhat.com"},{"url":"https://www.debian.org/security/2009/dsa-1888","tags":["Mailing List","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://java.sun.com/j2se/1.5.0/ReleaseNotes.html","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://java.sun.com/javase/6/webnotes/6u17.html","tags":["Release Notes"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.apple.com/archives/security-announce/2009/Nov/msg00000.html","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/36139","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/36157","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/36434","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/36669","tags":["Not Applicable"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/36739","tags":["Not Applicable"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/37386","tags":["Not Applicable"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/42467","tags":["Not Applicable"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://security.gentoo.org/glsa/glsa-200911-02.xml","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://security.gentoo.org/glsa/glsa-200912-01.xml","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://support.apple.com/kb/HT3937","tags":["Broken Link"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.debian.org/security/2009/dsa-1874","tags":["Mailing List"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.mandriva.com/security/advisories?name=MDVSA-2009:197","tags":["Not Applicable"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.mandriva.com/security/advisories?name=MDVSA-2009:216","tags":["Not Applicable"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.mandriva.com/security/advisories?name=MDVSA-2009:258","tags":["Not Applicable"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.mandriva.com/security/advisories?name=MDVSA-2010:084","tags":["Not Applicable"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.redhat.com/support/errata/RHSA-2009-1207.html","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.redhat.com/support/errata/RHSA-2009-1432.html","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/archive/1/515055/100/0/threaded","tags":["Broken Link"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id?1022631","tags":["Broken Link"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/usn-810-1","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2009-2409","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."}