{"vuid":"VU#935800","idnumber":"935800","name":"Multiple versions of OpenLDAP are vulnerable to denial-of-service attacks","keywords":["OpenLDAP","PROTOS","LDAP"],"overview":"Multiple versions of OpenLDAP contain vulnerabilities that may allow denial-of-service attacks. 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.","clean_desc":"There are multiple vulnerabilities in the OpenLDAP implementations of the LDAP protocol. These vulnerabilities exist in the code that translates network datagrams into application-specific information. In the encoding section of the test suite, this product failed the group that tests the handling of invalid BER length of length fields. In the application section of the test suite, this product passed all 6685 test cases.","impact":"These vulnerabilities allow a remote attacker to crash affected OpenLDAP servers, resulting in a denial-of-service condition.","resolution":"Apply a patch from your vendor Please consult the Systems Affected section for vendor-specific information on addressing this vulnerability.","workarounds":"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 \n            ldap    389/udp     # Lightweight Directory Access Protocol \n            ldaps   636/tcp     # ldap protocol over TLS/SSL (was sldap) \n            ldaps   636/udp     # ldap protocol over TLS/SSL (was sldap)","sysaffected":"","thanks":"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. We would also like to thank the OpenLDAP Core Team for their assistance in preparing this document.","author":"This document was written by Jeffrey P. Lanza.","public":["http://www.openldap.org/","http://www.ee.oulu.fi/research/ouspg/protos/testing/c06/ldapv3/","http://www.securityfocus.com/bid/3049","http://xforce.iss.net/static/6904.php"],"cveids":["CVE-2001-0977"],"certadvisory":"CA-2001-18","uscerttechnicalalert":null,"datecreated":"2001-04-09T23:59:30Z","publicdate":"2001-07-16T00:00:00Z","datefirstpublished":"2001-07-17T03:36:16Z","dateupdated":"2002-12-12T23:24:45Z","revision":53,"vrda_d1_directreport":"","vrda_d1_population":"","vrda_d1_impact":"","cam_widelyknown":"15","cam_exploitation":"10","cam_internetinfrastructure":"17","cam_population":"10","cam_impact":"3","cam_easeofexploitation":"5","cam_attackeraccessrequired":"15","cam_scorecurrent":"1.771875","cam_scorecurrentwidelyknown":"1.9828125","cam_scorecurrentwidelyknownexploited":"2.4046875","ipprotocol":"","cvss_accessvector":"","cvss_accesscomplexity":"","cvss_authentication":null,"cvss_confidentialityimpact":"","cvss_integrityimpact":"","cvss_availabilityimpact":"","cvss_exploitablity":null,"cvss_remediationlevel":"","cvss_reportconfidence":"","cvss_collateraldamagepotential":"","cvss_targetdistribution":"","cvss_securityrequirementscr":"","cvss_securityrequirementsir":"","cvss_securityrequirementsar":"","cvss_basescore":"","cvss_basevector":"","cvss_temporalscore":"","cvss_environmentalscore":"","cvss_environmentalvector":"","metric":1.771875,"vulnote":null}