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Test ID:1.3.6.1.4.1.25623.1.0.69380
Category:Ubuntu Local Security Checks
Title:Ubuntu USN-1100-1 (openldap2.3)
Summary:Ubuntu USN-1100-1 (openldap2.3)
Description:The remote host is missing an update to openldap2.3
announced via advisory USN-1100-1.

Details follow:

It was discovered that OpenLDAP did not properly check forwarded
authentication failures when using a slave server and chain overlay. If
OpenLDAP were configured in this manner, an attacker could bypass
authentication checks by sending an invalid password to a slave server.
(CVE-2011-1024)

It was discovered that OpenLDAP did not properly perform authentication
checks to the rootdn when using the back-ndb backend. An attacker could
exploit this to access the directory by sending an arbitrary password.
Ubuntu does not ship OpenLDAP with back-ndb support by default. This issue
did not affect Ubuntu 8.04 LTS. (CVE-2011-1025)

It was discovered that OpenLDAP did not properly validate modrdn requests.
An unauthenticated remote user could use this to cause a denial of service
via application crash. (CVE-2011-1081)

Solution:
The problem can be corrected by upgrading your system to the
following package versions:

Ubuntu 8.04 LTS:
slapd 2.4.9-0ubuntu0.8.04.5

Ubuntu 9.10:
slapd 2.4.18-0ubuntu1.2

Ubuntu 10.04 LTS:
slapd 2.4.21-0ubuntu5.4

Ubuntu 10.10:
slapd 2.4.23-0ubuntu3.5

In general, a standard system update will make all the necessary changes.

http://www.securityspace.com/smysecure/catid.html?in=USN-1100-1

Risk factor : High
Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2011-1024
http://www.openldap.org/lists/openldap-announce/201102/msg00000.html
http://www.openldap.org/lists/openldap-technical/201004/msg00247.html
http://openwall.com/lists/oss-security/2011/02/24/12
http://openwall.com/lists/oss-security/2011/02/25/13
http://www.mandriva.com/security/advisories?name=MDVSA-2011:055
http://www.mandriva.com/security/advisories?name=MDVSA-2011:056
http://www.redhat.com/support/errata/RHSA-2011-0346.html
http://www.redhat.com/support/errata/RHSA-2011-0347.html
http://www.ubuntu.com/usn/USN-1100-1
http://securitytracker.com/id?1025188
http://secunia.com/advisories/43331
http://secunia.com/advisories/43708
http://secunia.com/advisories/43718
http://www.vupen.com/english/advisories/2011/0665
Common Vulnerability Exposure (CVE) ID: CVE-2011-1025
http://securitytracker.com/id?1025190
Common Vulnerability Exposure (CVE) ID: CVE-2011-1081
http://openwall.com/lists/oss-security/2011/02/28/1
http://openwall.com/lists/oss-security/2011/02/28/2
http://openwall.com/lists/oss-security/2011/03/01/11
http://openwall.com/lists/oss-security/2011/03/01/15
http://securitytracker.com/id?1025191
XForce ISS Database: openldap-modrdnc-dos(66239)
http://xforce.iss.net/xforce/xfdb/66239
CopyrightCopyright (c) 2011 E-Soft Inc. http://www.securityspace.com

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