CVE-2009-4565

sendmail before 8.14.4 does not properly handle a '\0' character in a Common Name (CN) field of an X.509 certificate, which (1) allows man-in-the-middle attackers to spoof arbitrary SSL-based SMTP servers via a crafted server certificate issued by a legitimate Certification Authority, and (2) allows remote attackers to bypass intended access restrictions via a crafted client certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.

• CWE-310

• http://lists.opensuse.org/opensuse-security-announce/2010-03/msg00004.html
• http://marc.info/?l=bugtraq&m=126953289726317&w=2
• http://secunia.com/advisories/37998Vendor Advisory
• http://secunia.com/advisories/38314
• http://secunia.com/advisories/38915
• http://secunia.com/advisories/39088
• http://secunia.com/advisories/40109
• http://secunia.com/advisories/43366
• http://security.gentoo.org/glsa/glsa-201206-30.xml
• http://sunsolve.sun.com/search/document.do?assetkey=1-77-1021797.1-1
• http://www.debian.org/security/2010/dsa-1985
• http://www.redhat.com/support/errata/RHSA-2011-0262.html
• http://www.securityfocus.com/bid/37543
• http://www.sendmail.org/releases/8.14.4Patch
• http://www.vupen.com/english/advisories/2009/3661Patch, Vendor Advisory
• http://www.vupen.com/english/advisories/2010/0719
• http://www.vupen.com/english/advisories/2010/1386
• http://www.vupen.com/english/advisories/2011/0415
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10255
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11822
• http://lists.opensuse.org/opensuse-security-announce/2010-03/msg00004.html
• http://marc.info/?l=bugtraq&m=126953289726317&w=2
• http://secunia.com/advisories/37998Vendor Advisory
• http://secunia.com/advisories/38314
• http://secunia.com/advisories/38915
• http://secunia.com/advisories/39088
• http://secunia.com/advisories/40109
• http://secunia.com/advisories/43366
• http://security.gentoo.org/glsa/glsa-201206-30.xml
• http://sunsolve.sun.com/search/document.do?assetkey=1-77-1021797.1-1
• http://www.debian.org/security/2010/dsa-1985
• http://www.redhat.com/support/errata/RHSA-2011-0262.html
• http://www.securityfocus.com/bid/37543
• http://www.sendmail.org/releases/8.14.4Patch
• http://www.vupen.com/english/advisories/2009/3661Patch, Vendor Advisory
• http://www.vupen.com/english/advisories/2010/0719
• http://www.vupen.com/english/advisories/2010/1386
• http://www.vupen.com/english/advisories/2011/0415
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10255
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11822

Published

Jan 4, 2010

Last Modified

Jun 16, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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