Sun Java System Directory Server 5.2 Uninitialized Pointer Cleanup
Design Error Vulnerability
iDefense Security Advisory 03.23.07
Mar 23, 2007
Sun Java System Directory Server is an LDAP server distributed by Sun with
multiple products. More information is available at the following URL.
Remote exploitation of a design error vulnerability in Sun Microsystems
Java System Directory Server 5.2 may cause a denial of service (DoS)
Due to a design error in the clean-up code following certain types of failed
queries, it is possible to cause the server to call the free() function
address obtained from uninitialized memory. This can result in an invalid
memory reference leading to denial of service.
Exploitation of this vulnerability allows remote attackers to cause a denial
of service against the affected server, 'ns-slapd'.
In some situations it may be possible to put information from the remote
attacker in the memory range being accessed which may allow execution of
code, however this has not yet been demonstrated.
iDefense has confirmed Sun Java System Directory Server 5.2 Directory Server
5.2 2005Q4 is affected by this vulnerability. Previous versions are also
suspected to be vulnerable.
Restrict remote access at the network boundary, unless remote parties
service. Access to the affected host should be filtered at the network
boundary if global accessibility is not required. Restricting access to only
trusted hosts and networks may reduce the likelihood of exploitation.
VI. VENDOR RESPONSE
Sun Microsystems Inc. has addressed this issue in Sun Java System Directory
Server 5.2 Patch5. For more information see Sun Alert ID 102853 by visiting
the URL shown below.
VII. CVE INFORMATION
The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2006-4175 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org/), which standardizes names for
VIII. DISCLOSURE TIMELINE
08/16/2006 Initial vendor notification
08/21/2006 Initial vendor response
03/23/2007 Coordinated public disclosure
The discoverer of this vulnerability wishes to remain anonymous.
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X. LEGAL NOTICES
Copyright =A9 2007 iDefense, Inc.
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