The Teamware Office suite 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 Teamware Office suite is packaged with a combination X.500/LDAP server that provides directory services. Multiple versions of the Office product contain vulnerabilities that cause the LDAP server to crash in response to traffic sent by the PROTOS LDAPv3 test suite.
In the encoding section of the test suite, this product failed 9 of 16 groups involving invalid encodings for several BER object types.
These vulnerabilities allow a remote attacker to crash affected Teamware LDAP servers, resulting in a denial-of-service condition. They may also allow a remote attacker to execute arbitrary code with the privileges of the Teamware server. The server typically runs with system privileges.
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.