CVE-2009-3767

Name: CVE-2009-3767
Creator: NVD / NIST
Published: 2009-10-23T19:30:00.25+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 3.09%

Last modified Jun 16, 2026

CVE-2009-3767 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 3.09% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability

3.09%

86.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-295

Affected Software

Vendor	Product	Versions
Openldap	Openldap	< 2.4.18
Apple	Mac Os X	< 10.6.2
Fedoraproject	Fedora	11

References

http://lists.apple.com/archives/security-announce/2009/Nov/msg00000.htmlMailing List, Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2010-March/036138.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2009-10/msg00001.htmlMailing List, Third Party Advisory
http://marc.info/?l=oss-security&m=125198917018936&w=2Third Party Advisory
http://marc.info/?l=oss-security&m=125369675820512&w=2Third Party Advisory
http://secunia.com/advisories/38769Third Party Advisory
http://secunia.com/advisories/40677Third Party Advisory
http://security.gentoo.org/glsa/glsa-201406-36.xmlThird Party Advisory
http://support.apple.com/kb/HT3937Broken Link
http://www.openldap.org/devel/cvsweb.cgi/libraries/libldap/tls_o.c.diff?r1=1.8&r2=1.11&f=hPatch, Vendor Advisory
http://www.redhat.com/support/errata/RHSA-2010-0543.htmlThird Party Advisory
http://www.redhat.com/support/errata/RHSA-2011-0896.htmlThird Party Advisory
http://www.vupen.com/english/advisories/2009/3056Third Party Advisory
http://www.vupen.com/english/advisories/2010/1858Third Party Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11178Third Party Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7274Third Party Advisory
http://lists.apple.com/archives/security-announce/2009/Nov/msg00000.htmlMailing List, Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2010-March/036138.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2009-10/msg00001.htmlMailing List, Third Party Advisory
http://marc.info/?l=oss-security&m=125198917018936&w=2Third Party Advisory
http://marc.info/?l=oss-security&m=125369675820512&w=2Third Party Advisory
http://secunia.com/advisories/38769Third Party Advisory
http://secunia.com/advisories/40677Third Party Advisory
http://security.gentoo.org/glsa/glsa-201406-36.xmlThird Party Advisory
http://support.apple.com/kb/HT3937Broken Link
http://www.openldap.org/devel/cvsweb.cgi/libraries/libldap/tls_o.c.diff?r1=1.8&r2=1.11&f=hPatch, Vendor Advisory
http://www.redhat.com/support/errata/RHSA-2010-0543.htmlThird Party Advisory
http://www.redhat.com/support/errata/RHSA-2011-0896.htmlThird Party Advisory
http://www.vupen.com/english/advisories/2009/3056Third Party Advisory
http://www.vupen.com/english/advisories/2010/1858Third Party Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11178Third Party Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7274Third Party Advisory

Timeline

Published: Oct 23, 2009
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2009-3767?

How severe is CVE-2009-3767?

Severity scoring for CVE-2009-3767 is pending analysis. The EPSS model estimates a 3.09% probability of exploitation in the next 30 days.

How do I fix CVE-2009-3767?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2009-3767?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST