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Rapid7 Advisory R7-0012: Lotus Notes/Domino R6-beta PROTOS LDAP Denial of Service Regression

CVE:CAN-2001-1311 (regression)
CERT Note:583184 (regression)
CERT Advisory:CA-2001-18 (regression)
Lotus SPR:DWUU4W6NC8 (regression)
Bugtraq ID: 7039


March 12, 2003 - In July 2001, the PROTOS protocol testing group at the University of Oulu in Finland released an LDAP protocol test suite that exposed flaws in LDAP implementations from multiple vendors.

[1] Lotus Domino R5.0.7 and earlier were affected by the PROTOS LDAP issues, resulting in buffer overflows and denial of service against the Domino server. Lotus addressed these issues in Domino R5.0.7a, released May 18th 2001.

[2] While regression testing the pre-release and beta versions of Lotus Domino R6 with the PROTOS LDAP test suite, we found that these releases were vulnerable to the issues PROTOS discovered.

Affected system(s):


  • Lotus Notes/Domino R6 pre-release and beta versions
  • Lotus Domino R5.0.7 and earlier


  • Lotus Notes/Domino R6.0 Gold
  • Lotus Notes/Domino R6.0.1
  • Lotus Notes/Domino R5.0.7a through R5.0.12

Vendor Info


Lotus was notified and they have fixed this vulnerability. Lotus originally tracked these issues as SPR #DWUU4W6NC8 and are tracking the R6 beta issues with this SPR.

[3] See the References section for more information.

Detailed Analysis

Credit for discovery of this vulnerability goes to the PROTOS project. Please see their LDAP test suite page for more information. [1]


[1] PROTOS - Security Testing of Protocol Implementations

[2] Lotus statement about LDAP vulnerability fixes

[3] Lotus SPR #DWUU4W6NC8!SearchView&Query=DWUU4W6NC8


Users running R6 beta and pre-release builds should upgrade to R6.0 Gold or higher. Due to other vulnerabilities discovered in R6.0 Gold, you should consider upgrading to R6.0.1, which was released in February 2003.

Users running R5.0.7a and higher are not affected.

Domino incremental installers may be downloaded from the following URL:

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