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OpenLDAP Denial of Service Vulnerabilities
Secunia Advisory:	SA27424	Advisory Toolbox: Issue ticket Save in to-do list Mark as handled Exploit information Download as PDF Review actions Add comment
Release Date:	2007-10-29
Last Update:	2008-02-08
Popularity:	6,325 views

Critical:	Less critical
Impact:	DoS
Where:	From remote
Solution Status:	Vendor Patch

Software:	OpenLDAP 2.3.x

Binary Analysis:	BA288 :: Available for Credits

Subscribe:	Instant alerts on relevant vulnerabilities

CVE reference:	CVE-2007-5708 CVE-2007-5707 CVE-2007-6698

Description: Some vulnerabilities have been reported in OpenLDAP, which can be exploited by malicious users to cause a DoS (Denial of Service). 1) A vulnerability is caused due to the "add_filter_attrs()" function in servers/slapd/overlay/pcache.c not correctly NULL terminating "new_attrs", which can be exploited to crash slapd due to an out of bounds memory access. Successful exploitation may require that slapd runs as proxy-caching server. 2) An error within the normalisation of "objectClasses" can be exploited to crash a vulnerable server by sending a malformed "objectClasses" attribute. The vulnerabilities are reported in versions prior to 2.3.39. 3) An error when performing modify operations with a NOOP control on entries stored in the BDB backend can be exploited to crash the slapd daemon. The vulnerability is reported in versions prior to 2.3.36. Note: Several other bugs, which may have a security impact, were also reported. Solution: Update to version 2.3.39. http://www.openldap.org/software/download/ Provided and/or discovered by: 1) Tony Blake 2) Thomas Sesselmann 3) Jonathan Clarke Changelog: 2007-10-31: Added CVE reference. 2008-02-08: Added vulnerability #3. Original Advisory: http://www.openldap.org/software/release/changes.html 1) http://www.openldap.org/its/index.cgi/Software%20Bugs?id=5163 2) http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=440632 http://www.openldap.org/its/index.cgi/Software%20Bugs?id=5119 3) http://www.openldap.org/its/index.cgi/Software%20Bugs?id=4925

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