National Cyber Awareness System
Vulnerability Summary for CVE-2009-3767
Original release date:10/23/2009
Last revised:08/27/2011
Source:
US-CERT/NIST
Overview
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.
Impact
CVSS Severity (version 2.0):
Impact Subscore:
6.4
Exploitability Subscore:
8.6
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Medium
Authentication: Not required to exploit
Impact Type:Allows unauthorized disclosure of information; Allows unauthorized modification; Allows disruption of service
Official Statement from OpenLDAP (10/30/2009)
OpenLDAP reported this issue and published a patch for it on 2009-07-30. The patch was included in OpenLDAP 2.4.18 which was released on 2009-09-06. The current release of OpenLDAP is available from the following location:
http://www.openldap.org/software/download/
Official Statement from Red Hat (07/20/2010)
Red Hat is aware of this issue and is tracking it via the following bug: https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2009-3767
This issue was addressed in the openldap packages as shipped with Red Hat Enterprise Linux 5 and 4 via: https://rhn.redhat.com/errata/RHSA-2010-0198.html and https://rhn.redhat.com/errata/RHSA-2010-0543.html respectively.
The Red Hat Security Response Team has rated this issue as having moderate security impact, a future openldap update may address this flaw in Red Hat Enterprise Linux 3.
References to Advisories, Solutions, and Tools
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External Source: VUPEN
Name: ADV-2010-1858
External Source: VUPEN
Name: ADV-2009-3056
External Source: REDHAT
Name: RHSA-2011:0896
External Source: REDHAT
Name: RHSA-2010:0543
External Source: CONFIRM
Name: http://www.openldap.org/devel/cvsweb.cgi/libraries/libldap/tls_o.c.diff?r1=1.8&r2=1.11&f=h
External Source: CONFIRM
Name: http://support.apple.com/kb/HT3937
External Source: SECUNIA
Name: 40677
External Source: SECUNIA
Name: 38769
External Source: OVAL
Name: oval:org.mitre.oval:def:7274
External Source: OVAL
Name: oval:org.mitre.oval:def:11178
External Source: MLIST
Name: [oss-security] 20090923 Re: More CVE-2009-2408 like issues
External Source: MLIST
Name: [oss-security] 20090903 More CVE-2009-2408 like issues
External Source: SUSE
Name: SUSE-SR:2009:016
External Source: FEDORA
Name: FEDORA-2010-0752
External Source: APPLE
Name: APPLE-SA-2009-11-09-1
References to Check Content
Identifier:oval:org.mitre.oval:def:7274
Check System:http://oval.mitre.org/XMLSchema/oval-definitions-5
Identifier:oval:org.mitre.oval:def:11178
Check System:http://oval.mitre.org/XMLSchema/oval-definitions-5
