{"id":"CVE-2009-3555","url":"https://www.cyber-defence.io/tools/cve/CVE-2009-3555","generatedAt":"2026-10-27T18:48:07.149Z","title":"The TLS protocol, and the SSL protocol 3.0 and possibly earlier, as used in Microsoft Internet Information Services (IIS) 7.0, mod_ssl in the Apache HTTP Server 2.2.14 and earlier, OpenSSL before 0.9.8l, GnuTLS 2.8.5 and earlier, Mozilla Network…","description":"The TLS protocol, and the SSL protocol 3.0 and possibly earlier, as used in Microsoft Internet Information Services (IIS) 7.0, mod_ssl in the Apache HTTP Server 2.2.14 and earlier, OpenSSL before 0.9.8l, GnuTLS 2.8.5 and earlier, Mozilla Network Security Services (NSS) 3.12.4 and earlier, multiple Cisco products, and other products, does not properly associate renegotiation handshakes with an existing connection, which allows man-in-the-middle attackers to insert data into HTTPS sessions, and possibly other types of sessions protected by TLS or SSL, by sending an unauthenticated request that is processed retroactively by a server in a post-renegotiation context, related to a \"plaintext injection\" attack, aka the \"Project Mogul\" issue.","published":"2009-11-09T17:30:00.000Z","lastModified":"2026-06-16T23:11:50.000Z","status":"Modified","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-295","CWE-300"],"affected":["apache/http server","gnu/gnutls","mozilla/nss","openssl/openssl","canonical/ubuntu linux","debian/debian linux","fedoraproject/fedora","f5/nginx"],"epss":{"score":0.87264,"percentile":0.9975,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":2,"verified":true,"firstPublished":"2009-11-10","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":10579,"kind":"exploit","title":"TLS - Renegotiation","url":"https://www.exploit-db.com/exploits/10579","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/multiple/remote/10579.py","file":"exploits/multiple/remote/10579.py","published":"2009-12-21","added":"2009-12-20","updated":null,"author":"RedTeam Pentesting","type":"remote","platform":"multiple","port":null,"verified":true,"codes":["CVE-2009-3555"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":null},{"edbId":10071,"kind":"exploit","title":"Mozilla NSS - NULL Character CA SSL Certificate Validation Security Bypass","url":"https://www.exploit-db.com/exploits/10071","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/multiple/remote/10071.txt","file":"exploits/multiple/remote/10071.txt","published":"2009-11-10","added":"2009-11-09","updated":null,"author":"Dan Kaminsky","type":"remote","platform":"multiple","port":null,"verified":true,"codes":["CVE-2009-3555","OSVDB-59970"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":"https://www.securityfocus.com/bid/35888/info"}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 87.3%, higher than 100% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://archives.neohapsis.com/archives/bugtraq/2013-11/0120.html","tags":["Broken Link"],"source":"secalert@redhat.com"},{"url":"http://blog.g-sec.lu/2009/11/tls-sslv3-renegotiation-vulnerability.html","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://blogs.iss.net/archive/sslmitmiscsrf.html","tags":["Broken Link"],"source":"secalert@redhat.com"},{"url":"http://blogs.sun.com/security/entry/vulnerability_in_tls_protocol_during","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://clicky.me/tlsvuln","tags":["Exploit","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://extendedsubset.com/?p=8","tags":["Broken Link"],"source":"secalert@redhat.com"},{"url":"http://extendedsubset.com/Renegotiating_TLS.pdf","tags":["Broken Link"],"source":"secalert@redhat.com"},{"url":"http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c01945686","tags":["Broken Link"],"source":"secalert@redhat.com"},{"url":"http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c02436041","tags":["Broken Link"],"source":"secalert@redhat.com"},{"url":"http://itrc.hp.com/service/cki/docDisplay.do?docId=emr_na-c02273751","tags":["Broken Link"],"source":"secalert@redhat.com"},{"url":"http://kbase.redhat.com/faq/docs/DOC-20491","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://lists.apple.com/archives/security-announce/2010//May/msg00001.html","tags":["Mailing List","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://lists.apple.com/archives/security-announce/2010//May/msg00002.html","tags":["Mailing List","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://lists.apple.com/archives/security-announce/2010/Jan/msg00000.html","tags":["Mailing List","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2010-April/039561.html","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2010-April/039957.html","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2010-May/040652.html","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2010-October/049455.html","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2010-October/049528.html","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2010-October/049702.html","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://lists.gnu.org/archive/html/gnutls-devel/2009-11/msg00029.html","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2009-11/msg00009.html","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2010-04/msg00001.html","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2010-05/msg00001.html","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2010-05/msg00002.html","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2010-06/msg00001.html","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2010-10/msg00006.html","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2010-12/msg00005.html","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2010-12/msg00006.html","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2011-07/msg00013.html","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2011-07/msg00014.html","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://marc.info/?l=apache-httpd-announce&m=125755783724966&w=2","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://marc.info/?l=bugtraq&m=126150535619567&w=2","tags":["Third Party 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Advisory"],"source":"secalert@redhat.com"},{"url":"http://marc.info/?l=cryptography&m=125752275331877&w=2","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://openbsd.org/errata45.html#010_openssl","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://openbsd.org/errata46.html#004_openssl","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://osvdb.org/60521","tags":["Broken Link"],"source":"secalert@redhat.com"},{"url":"http://osvdb.org/60972","tags":["Broken Link"],"source":"secalert@redhat.com"},{"url":"http://osvdb.org/62210","tags":["Broken Link"],"source":"secalert@redhat.com"},{"url":"http://osvdb.org/65202","tags":["Broken Link"],"source":"secalert@redhat.com"},{"url":"http://seclists.org/fulldisclosure/2009/Nov/139","tags":["Mailing List","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/37291","tags":["Third Party 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Advisory"],"source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/37656","tags":["Third Party Advisory"],"source":"secalert@redhat.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2009-3555","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."}