CVE-2009-3767

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.

Category

4.3
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 2.18% Top 20%
Vendor Advisory fedoraproject.org Vendor Advisory gentoo.org Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory apple.com Vendor Advisory openldap.org
Affected: n/a n/a
Published at:
Updated at:

References

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

Frequently Asked Questions

What is the severity of CVE-2009-3767?
CVE-2009-3767 has been scored as a medium severity vulnerability.
How to fix CVE-2009-3767?
To fix CVE-2009-3767, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2009-3767 being actively exploited in the wild?
It is possible that CVE-2009-3767 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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