libraries/libldap/tls_o.c in OpenLDAP 2.2 and 2.4, and possibly other versions, when OpenSSL is used, does not properly handle a '\0' character in a domain name in the subject's Common Name (CN) 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, a related issue to CVE-2009-2408.

References

• https://nvd.nist.gov/vuln/detail/CVE-2009-3767
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11178
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7274
• http://lists.apple.com/archives/security-announce/2009/Nov/msg00000.html
• http://lists.fedoraproject.org/pipermail/package-announce/2010-March/036138.html
• http://lists.opensuse.org/opensuse-security-announce/2009-10/msg00001.html
• http://marc.info/?l=oss-security&m=125198917018936&w=2
• http://marc.info/?l=oss-security&m=125369675820512&w=2
• http://secunia.com/advisories/38769
• http://secunia.com/advisories/40677
• http://security.gentoo.org/glsa/glsa-201406-36.xml
• http://support.apple.com/kb/HT3937
• http://www.openldap.org/devel/cvsweb.cgi/libraries/libldap/tls_o.c.diff?r1=1.8&r2=1.11&f=h
• http://www.redhat.com/support/errata/RHSA-2010-0543.html
• http://www.redhat.com/support/errata/RHSA-2011-0896.html
• http://www.vupen.com/english/advisories/2009/3056
• http://www.vupen.com/english/advisories/2010/1858