Software Engineering Institute

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.

In the application section of the test suite, this product failed 4 of 32 groups. The remaining 45 groups were not exercised during the test runs. The four failed groups indicate the presence of buffer overflow vulnerabilities.

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

Please consult the Systems Affected section for vendor-specific information on addressing this vulnerability.

Block access to directory services at network perimeter

As a temporary measure, it is possible to limit the scope of these vulnerabilities by blocking access to directory services at the network perimeter. Please note that this workaround does not protect vulnerable products from internal attacks.

            ldap    389/tcp     # Lightweight Directory Access Protocol
            ldap    389/udp     # Lightweight Directory Access Protocol
            ldaps   636/tcp     # ldap protocol over TLS/SSL (was sldap)
            ldaps   636/udp     # ldap protocol over TLS/SSL (was sldap)