Advisory Details

August 14th, 2008

OpenLDAP BER Decoding Remote DoS Vulnerability

ZDI-08-052
ZDI-CAN-347

CVE ID CVE-2008-2952
CVSS SCORE
AFFECTED VENDORS OpenLDAP Foundation
AFFECTED PRODUCTS OpenLDAP
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID ['6237']. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS

This vulnerability allows remote attackers to deny services on vulnerable installations of OpenLDAP. Authentication is not required to exploit this vulnerability.

The specific flaw exists in the decoding of ASN.1 BER network datagrams. When the size of a BerElement is specified incorrectly, the application will trigger an assert(), leading to abnormal program termination.
ADDITIONAL DETAILS OpenLDAP Foundation has issued an update to correct this vulnerability. More details can be found at:
http://www.openldap.org/software/release/changes.html
DISCLOSURE TIMELINE
  • 2008-06-26 - Vulnerability reported to vendor
  • 2008-08-14 - Coordinated public release of advisory
CREDIT Oscar Mira-Sanchez
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