IBM Lotus Domino SMTP NROUTER vCal request denial of service

domino-smtp-nrouter-dos (27413) The risk level is classified as MediumMedium Risk


IBM Lotus Domino is vulnerable to a denial of service in the SMTP service. A remote attacker could send a specially-crafted vCal meeting request to cause the NROUTER service to consume all available CPU resources, resulting in a denial of service.


Denial of Service


Upgrade to the latest version of Lotus Domino (6.5.4 FP1 or later), (6.5.5 or later) or (7.0 or later), as listed in IBM Technote (FAQ) - Lotus Domino SMTP-based Denial of Service vulnerability. See References.


  • BugTraq Mailing List, Mon Jun 26 2006 - 15:42:37 CDT : SYMSA-2006-006: Lotus Domino SMTP Based Denial of Service.
  • IBM Technote (FAQ): Lotus Domino SMTP-based Denial of Service vulnerability.
  • ISS X-Force Database: IBM Lotus Notes/Domino unspecified Agents, Router, and Security modules vulnerabilities.
  • Symantec Vulnerability Research Security Advisory SYMSA-2006-006: Lotus Domino SMTP Based Denial of Service.
  • BID-16158: IBM Lotus Domino and Notes Multiple Unspecified Vulnerabilities
  • BID-18020: Lotus Domino SMTP Meeting Request Remote Denial of Service Vulnerability
  • CVE-2006-0119: Multiple unspecified vulnerabilities in IBM Lotus Notes and Domino Server before 6.5.5 have unknown impact and attack vectors, due to potential security issues as identified by SPR numbers (1) GPKS6C9J67 in Agents, (2) JGAN6B6TZ3 and (3) KSPR699NBP in the Router, (4) GPKS5YQGPT in Security, or (5) HSAO6BNL6Y in the Web Server. NOTE: vector 3 is related to an issue in NROUTER in IBM Lotus Notes and Domino Server before 6.5.4 FP1, 6.5.5, and 7.0, which allows remote attackers to cause a denial of service (CPU consumption) via a crafted vCal meeting request sent via SMTP (aka SPR# KSPR699NBP).
  • SA18328: IBM Lotus Domino/Notes Multiple Vulnerabilities
  • SA20855: Lotus Domino Malformed vCal Processing Denial of Service
  • SECTRACK ID: 1016390: IBM Lotus Domino Bug in Processing vCal Meeting Requests Let Remote Users Deny Service

Platforms Affected:

  • IBM Lotus Domino 6.0
  • IBM Lotus Domino 6.0.1
  • IBM Lotus Domino 6.0.2
  • IBM Lotus Domino 6.0.3
  • IBM Lotus Domino 6.0.4
  • IBM Lotus Domino 6.0.5
  • IBM Lotus Domino 6.5.0
  • IBM Lotus Domino 6.5.1
  • IBM Lotus Domino 6.5.2
  • IBM Lotus Domino 6.5.3
  • IBM Lotus Domino 6.5.4
  • IBM OS 390
  • IBM OS 400
  • Microsoft Windows XP Professional


Jun 27, 2006

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