--- title: "CVE-2009-3555: Channel Accessible by Non-Endpoint | CubePath" 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…" language: en source: https://cubepath.com/security/cve/CVE-2009-3555 --- # CVE-2009-3555: Channel Accessible by Non-Endpoint | CubePath ## 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. Official description from the CVE record, published by redhat. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2009-3555) ## Key data ### CVSS 3.1 Critical 9.8 Score published by CISA-ADP in the CVE record. CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | Metric | Value | What it means | | ---------------------- | --------- | ----------------------------------------------------------------------------------- | | Attack vector | Network | The vulnerable component can be reached over a network, possibly from the Internet. | | Attack complexity | Low | No special conditions are needed. The attack can be repeated at will. | | Privileges required | None | No account or privileges are needed. | | User interaction | None | No action from any user is needed. | | Scope | Unchanged | The impact stays within the vulnerable component. | | Confidentiality impact | High | Serious or total effect on the secrecy of data. | | Integrity impact | High | Serious or total effect on the trustworthiness of data. | | Availability impact | High | Serious or total effect on availability. | CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) . ### EPSS Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days. Score 0.87264 (87.3% probability) Percentile 99.8% Scores of Nov 10, 2026 Model v2026.06.15 ### CISA assessment as of May 27, 2026 Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA. Exploitation Public proof of concept recorded by CISA Automatable yes Technical impact total ### Weakness (CWE) CWE catalog version 5.0. CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license. - [CWE-300](https://cwe.mitre.org/data/definitions/300.html) Channel Accessible by Non-Endpoint ## References Links listed in the CVE record. They lead to other sites, which CubePath does not control. - [APPLE-SA-2010-05-18-1](http://lists.apple.com/archives/security-announce/2010//May/msg00001.html) (lists.apple.com) vendor-advisory - [1023427](http://www.securitytracker.com/id?1023427) (securitytracker.com) vdb-entry - [support.avaya.com/css/P8/documents/100081611](http://support.avaya.com/css/P8/documents/100081611) - [62210](http://osvdb.org/62210) (osvdb.org) vdb-entry - [37640](http://secunia.com/advisories/37640) (secunia.com) third-party-advisory - [arubanetworks.com/support/alerts/aid-020810.txt](http://www.arubanetworks.com/support/alerts/aid-020810.txt) - [ADV-2010-0916](http://www.vupen.com/english/advisories/2010/0916) (vupen.com) vdb-entry - [support.avaya.com/css/P8/documents/100114327](http://support.avaya.com/css/P8/documents/100114327) - [RHSA-2010:0167](http://www.redhat.com/support/errata/RHSA-2010-0167.html) (redhat.com) vendor-advisory - [ADV-2010-2010](http://www.vupen.com/english/advisories/2010/2010) (vupen.com) vdb-entry - [FEDORA-2009-12750](https://www.redhat.com/archives/fedora-package-announce/2009-December/msg00428.html) (redhat.com) vendor-advisory - [ADV-2010-0086](http://www.vupen.com/english/advisories/2010/0086) (vupen.com) vdb-entry - [ADV-2010-1673](http://www.vupen.com/english/advisories/2010/1673) (vupen.com) vdb-entry - [\[tls\] 20091104 TLS renegotiation issue](http://www.ietf.org/mail-archive/web/tls/current/msg03948.html) (ietf.org) mailing-list - [37656](http://secunia.com/advisories/37656) (secunia.com) third-party-advisory - [RHSA-2010:0865](http://www.redhat.com/support/errata/RHSA-2010-0865.html) (redhat.com) vendor-advisory - [39628](http://secunia.com/advisories/39628) (secunia.com) third-party-advisory - [oracle.com/technetwork/topics/security/cpuapr2011-301950.ht…](http://www.oracle.com/technetwork/topics/security/cpuapr2011-301950.html) - [42724](http://secunia.com/advisories/42724) (secunia.com) third-party-advisory - [ADV-2009-3310](http://www.vupen.com/english/advisories/2009/3310) (vupen.com) vdb-entry - [ADV-2009-3205](http://www.vupen.com/english/advisories/2009/3205) (vupen.com) vdb-entry - [blogs.sun.com/security/entry/vulnerability\_in\_tls\_protocol\_…](http://blogs.sun.com/security/entry/vulnerability%5Fin%5Ftls%5Fprotocol%5Fduring) - [39461](http://secunia.com/advisories/39461) (secunia.com) third-party-advisory - [support.avaya.com/css/P8/documents/100114315](http://support.avaya.com/css/P8/documents/100114315) - [proftpd.org/docs/RELEASE\_NOTES-1.3.2c](http://www.proftpd.org/docs/RELEASE%5FNOTES-1.3.2c) - [GLSA-201406-32](http://security.gentoo.org/glsa/glsa-201406-32.xml) (security.gentoo.org) vendor-advisory - [ingate.com/Relnote.php?ver=481](http://www.ingate.com/Relnote.php?ver=481) - [1023204](http://www.securitytracker.com/id?1023204) (securitytracker.com) vdb-entry - [40866](http://secunia.com/advisories/40866) (secunia.com) third-party-advisory - [HPSBMU02799](http://marc.info/?l=bugtraq&m=134254866602253&w=2) (marc.info) vendor-advisory - [TA10-222A](http://www.us-cert.gov/cas/techalerts/TA10-222A.html) (us-cert.gov) third-party-advisory - [1023211](http://www.securitytracker.com/id?1023211) (securitytracker.com) vdb-entry - [SSRT090249](http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c01945686) (h20000.www2.hp.com) vendor-advisory - [39317](http://secunia.com/advisories/39317) (secunia.com) third-party-advisory - [1023212](http://www.securitytracker.com/id?1023212) (securitytracker.com) vdb-entry - [SUSE-SA:2010:061](http://lists.opensuse.org/opensuse-security-announce/2010-12/msg00005.html) (lists.opensuse.org) vendor-advisory - [39127](http://secunia.com/advisories/39127) (secunia.com) third-party-advisory - [40545](http://secunia.com/advisories/40545) (secunia.com) third-party-advisory - [ADV-2010-3069](http://www.vupen.com/english/advisories/2010/3069) (vupen.com) vdb-entry - [\[4.5\] 010: SECURITY FIX: November 26, 2009](http://openbsd.org/errata45.html#010%5Fopenssl) (openbsd.org) vendor-advisory - [1023210](http://www.securitytracker.com/id?1023210) (securitytracker.com) vdb-entry - [1023270](http://www.securitytracker.com/id?1023270) (securitytracker.com) vdb-entry - [40070](http://secunia.com/advisories/40070) (secunia.com) third-party-advisory - [1023273](http://www.securitytracker.com/id?1023273) (securitytracker.com) vdb-entry - [kbase.redhat.com/faq/docs/DOC-20491](http://kbase.redhat.com/faq/docs/DOC-20491) - [USN-927-5](http://www.ubuntu.com/usn/USN-927-5) (ubuntu.com) vendor-advisory - [PM12247](http://www-01.ibm.com/support/docview.wss?uid=swg1PM12247) (www-01.ibm.com) vendor-advisory - [SUSE-SU-2011:0847](http://lists.opensuse.org/opensuse-security-announce/2011-07/msg00014.html) (lists.opensuse.org) vendor-advisory - [MDVSA-2010:089](http://www.mandriva.com/security/advisories?name=MDVSA-2010:089) (mandriva.com) vendor-advisory - [RHSA-2010:0770](http://www.redhat.com/support/errata/RHSA-2010-0770.html) (redhat.com) vendor-advisory - [openssl.org/news/secadv\_20091111.txt](http://www.openssl.org/news/secadv%5F20091111.txt) - [1023275](http://www.securitytracker.com/id?1023275) (securitytracker.com) vdb-entry - [DSA-3253](http://www.debian.org/security/2015/dsa-3253) (debian.org) vendor-advisory - [ADV-2009-3484](http://www.vupen.com/english/advisories/2009/3484) (vupen.com) vdb-entry - [1023207](http://www.securitytracker.com/id?1023207) (securitytracker.com) vdb-entry - [37859](http://secunia.com/advisories/37859) (secunia.com) third-party-advisory - [SSRT101846](http://marc.info/?l=bugtraq&m=142660345230545&w=2) (marc.info) vendor-advisory - [1021752](http://sunsolve.sun.com/search/document.do?assetkey=1-77-1021752.1-1) (sunsolve.sun.com) vendor-advisory - [FEDORA-2010-6131](http://lists.fedoraproject.org/pipermail/package-announce/2010-May/040652.html) (lists.fedoraproject.org) vendor-advisory - [ADV-2010-0848](http://www.vupen.com/english/advisories/2010/0848) (vupen.com) vdb-entry - [\[oss-security\] 20091107 Re: \[TLS\] CVE-2009-3555 for TLS renegotiation MITM attacks](http://www.openwall.com/lists/oss-security/2009/11/07/3) (openwall.com) mailing-list - [39819](http://secunia.com/advisories/39819) (secunia.com) third-party-advisory - [IC68055](http://www-01.ibm.com/support/docview.wss?uid=swg1IC68055) (www-01.ibm.com) vendor-advisory - [links.org/?p=786](http://www.links.org/?p=786) - [60521](http://osvdb.org/60521) (osvdb.org) vdb-entry - [\[oss-security\] 20091123 Re: CVEs for nginx](http://www.openwall.com/lists/oss-security/2009/11/23/10) (openwall.com) mailing-list - [VU#120541](http://www.kb.cert.org/vuls/id/120541) (kb.cert.org) third-party-advisory - [1023217](http://www.securitytracker.com/id?1023217) (securitytracker.com) vdb-entry - [RHSA-2010:0768](http://www.redhat.com/support/errata/RHSA-2010-0768.html) (redhat.com) vendor-advisory - [ADV-2009-3353](http://www.vupen.com/english/advisories/2009/3353) (vupen.com) vdb-entry - [FEDORA-2010-5357](http://lists.fedoraproject.org/pipermail/package-announce/2010-April/039561.html) (lists.fedoraproject.org) vendor-advisory - [39136](http://secunia.com/advisories/39136) (secunia.com) third-party-advisory - [openoffice.org/security/cves/CVE-2009-3555.html](http://www.openoffice.org/security/cves/CVE-2009-3555.html) - [ADV-2011-0032](http://www.vupen.com/english/advisories/2011/0032) (vupen.com) vdb-entry - [1023148](http://securitytracker.com/id?1023148) (securitytracker.com) vdb-entry - [openSUSE-SU-2011:0845](http://lists.opensuse.org/opensuse-security-announce/2011-07/msg00013.html) (lists.opensuse.org) vendor-advisory - [36935](http://www.securityfocus.com/bid/36935) (securityfocus.com) vdb-entry - [tombom.co.uk/blog/?p=85](http://www.tombom.co.uk/blog/?p=85) - [SSRT090208](http://marc.info/?l=bugtraq&m=130497311408250&w=2) (marc.info) vendor-advisory - [ADV-2010-1107](http://www.vupen.com/english/advisories/2010/1107) (vupen.com) vdb-entry - [1023218](http://www.securitytracker.com/id?1023218) (securitytracker.com) vdb-entry - [ADV-2010-1350](http://www.vupen.com/english/advisories/2010/1350) (vupen.com) vdb-entry - [RHSA-2010:0338](http://www.redhat.com/support/errata/RHSA-2010-0338.html) (redhat.com) vendor-advisory - [42379](http://secunia.com/advisories/42379) (secunia.com) third-party-advisory - [FEDORA-2009-12775](https://www.redhat.com/archives/fedora-package-announce/2009-December/msg00442.html) (redhat.com) vendor-advisory - [20091109 Transport Layer Security Renegotiation Vulnerability](http://www.cisco.com/en/US/products/products%5Fsecurity%5Fadvisory09186a0080b01d1d.shtml) (cisco.com) vendor-advisory - [IC67848](http://www-01.ibm.com/support/docview.wss?uid=swg1IC67848) (www-01.ibm.com) vendor-advisory - [1023213](http://www.securitytracker.com/id?1023213) (securitytracker.com) vdb-entry - [FEDORA-2010-16240](http://lists.fedoraproject.org/pipermail/package-announce/2010-October/049702.html) (lists.fedoraproject.org) vendor-advisory - [ADV-2010-1793](http://www.vupen.com/english/advisories/2010/1793) (vupen.com) vdb-entry - [oval:org.mitre.oval:def:11617](https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11617) (oval.cisecurity.org) vdb-entry signature - [extendedsubset.com/?p=8](http://extendedsubset.com/?p=8) - [37292](http://secunia.com/advisories/37292) (secunia.com) third-party-advisory - [SSRT100817](http://www.securityfocus.com/archive/1/522176) (securityfocus.com) vendor-advisory - [tls-renegotiation-weak-security(54158)](https://exchange.xforce.ibmcloud.com/vulnerabilities/54158) (exchange.xforce.ibmcloud.com) vdb-entry - [APPLE-SA-2010-05-18-2](http://lists.apple.com/archives/security-announce/2010//May/msg00002.html) (lists.apple.com) vendor-advisory - [39278](http://secunia.com/advisories/39278) (secunia.com) third-party-advisory - [1023205](http://www.securitytracker.com/id?1023205) (securitytracker.com) vdb-entry - [RHSA-2010:0130](http://www.redhat.com/support/errata/RHSA-2010-0130.html) (redhat.com) vendor-advisory - [tomcat.apache.org/native-doc/miscellaneous/changelog-1.1.x.…](http://tomcat.apache.org/native-doc/miscellaneous/changelog-1.1.x.html) and 198 more in the [record on cve.org](https://www.cve.org/CVERecord?id=CVE-2009-3555) ## Timeline 1. ID reserved Oct 5, 2009 2. Record published Nov 9, 2009 3. Record last updated May 27, 2026 ## Look up another CVE ## About CubePath CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection. [Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection) Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:00 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)