The Lotus Domino R5 Server Family contains vulnerabilities that may allow denial-of-service attacks, unauthorized privileged access, or both. These vulnerabilities were revealed using the PROTOS LDAPv3 test suite and are documented in CERT Advisory CA-2001-18. If your site uses this product, the CERT/CC encourages you to follow the advice provided below.
The Lotus Domino R5 Server Family (including the Enterprise, Application, and Mail servers) contains multiple vulnerabilities in the code that processes LDAP requests.
In the encoding section of the test suite, this product failed 1 of 77 groups. The failed group tests a server's response to miscellaneous packets with semi-valid BER encodings.
One or more of these vulnerabilities allow a remote attacker to execute arbitrary code with the privileges of the Domino server. The server typically runs with system privileges. At least one of these vulnerabilities has been successfully exploited in a laboratory environment.
Apply a patch from your vendor
Block access to directory services at network perimeter
The CERT Coordination Center thanks the Oulu University Secure Programming Group for reporting these vulnerabilities to us, for their detailed technical analyses, and for their assistance in preparing this document.