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2004: 3,100 advisories published
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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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