Secunia Security Advisory - Some vulnerabilities have been reported in OpenLDAP, which can be exploited by malicious users to cause a DoS (Denial of Service).
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TITLE:
OpenLDAP Denial of Service Vulnerabilities
SECUNIA ADVISORY ID:
SA27424
VERIFY ADVISORY:
http://secunia.com/advisories/27424/
CRITICAL:
Less critical
IMPACT:
DoS
WHERE:
>From remote
SOFTWARE:
OpenLDAP 2.3.x
http://secunia.com/product/5943/
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.
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
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
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