Bug 530715 - (CVE-2009-3767) CVE-2009-3767 OpenLDAP: Doesn't properly handle NULL character in subject Common Name
CVE-2009-3767 OpenLDAP: Doesn't properly handle NULL character in subject Com...
Status: CLOSED ERRATA
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
http://www.openldap.org/devel/cvsweb....
source=bugzilla,reported=20090821,pub...
: Security
Depends On: 537895 549872 560912 606399 606400
Blocks:
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Reported: 2009-10-24 08:55 EDT by Jan Lieskovsky
Modified: 2011-06-23 03:37 EDT (History)
6 users (show)

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Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2010-12-03 05:46:00 EST
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RHEL 7.3 requirements from Atomic Host:
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Description Jan Lieskovsky 2009-10-24 08:55:08 EDT
Common Vulnerabilities and Exposures assigned an identifier CVE-2009-3767 to
the following vulnerability:

libraries/libldap/tls_o.c in OpenLDAP, 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:
-----------
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-3767
http://marc.info/?l=oss-security&m=125198917018936&w=2
http://marc.info/?l=oss-security&m=125369675820512&w=2
http://lists.opensuse.org/opensuse-security-announce/2009-10/msg00001.html

Upstream patch:
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http://www.openldap.org/devel/cvsweb.cgi/libraries/libldap/tls_o.c.diff?r1=1.8&r2=1.11&f=h
Comment 1 Jan Lieskovsky 2009-10-24 08:57:02 EDT
This issue affects the versions of the openldap package, as shipped
with Red Hat Enterprise Linux 3, 4, and 5.

This issue affects the versions of the openldap package, as shipped
with Fedora releases of 10 (openldap-2.4.12-1.fc10),
11 (openldap-2.4.15-6.fc11) and as scheduled to appear in Fedora
of release 12 (openldap-2.4.18-5.fc12).

Please fix.
Comment 9 Vincent Danen 2009-11-25 12:38:44 EST
This issue affects openldap versions as shipped in Red Hat Enterprise Linux 3, 4, and 5.

Due to how OpenLDAP is typically deployed, the exposure of this flaw is limited.  A malicious attacker would need to perform attacks on a local network to perform a Man-in-the-Middle attack (ARP spoofing, fake AP, control over an intermediate node, or DNS hijacking), as well as having a crafted certificate that OpenLDAP would see as valid from an authorized and trusted Certificate Authority.

This was rated as having moderate security impact.  Future openldap updates may address this flaw.  We do not currently plan to release updates to address only this flaw.
Comment 12 Fedora Update System 2010-03-01 20:03:22 EST
openldap-2.4.15-7.fc11 has been pushed to the Fedora 11 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 13 errata-xmlrpc 2010-03-30 04:04:50 EDT
This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2010:0198 https://rhn.redhat.com/errata/RHSA-2010-0198.html
Comment 16 errata-xmlrpc 2010-07-20 12:34:53 EDT
This issue has been addressed in following products:

  Red Hat Enterprise Linux 4

Via RHSA-2010:0543 https://rhn.redhat.com/errata/RHSA-2010-0543.html
Comment 17 Vincent Danen 2010-07-20 17:20:01 EDT
Statement:

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.
Comment 18 errata-xmlrpc 2011-06-22 19:17:55 EDT
This issue has been addressed in following products:

  JBoss Enterprise Web Server 1.0

Via RHSA-2011:0896 https://rhn.redhat.com/errata/RHSA-2011-0896.html

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