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AUSCERT External Security Bulletin Redistribution
Lotus Domino Denial of Service Vulnerability during Notes
23 December 2011
AusCERT Security Bulletin Summary
Product: Lotus Domino Server and Notes
Operating System: AIX
Impact/Access: Denial of Service -- Remote with User Interaction
CVE Names: CVE-2011-1393
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Security Advisory: Lotus Domino Denial of Service Vulnerability during Notes
authentication processing (CVE-2011-1393)
Security Advisory CVE ID: CVE-2011-1393
Fortiguard contacted IBM to report a denial of service attack when a malicious
packet is supplied to the Domino Server via Notes RPC. For more information,
see Fortiguard Advisory FG-VD-11-007 at http://www.fortiguard.com/.
If an attacker can monitor and record all communications between a Notes client
and a Domino server then it is possible to crash the Domino server by modifying
a specific packet, in a specific way, during a specific operation.
Note: the use case cited by Fortiguard is very rare and, as such, requires
careful coordination by the attacker.
Resolving the problem
The following releases of IBM Lotus Domino Server are susceptible to this
8.5.2 FP3 and earlier
FG-VD-11-007 has been investigated by IBM and is tracked in SPR# KLYH8FTK5Y.
To address the issues, you are encouraged to apply the following IBM Lotus
Domino Server releases:
8.5.2 Fix Pack 4 (or later Fix Packs)
IBM offers the following CVSS Score for FG-VD-11-007
Security Rating using Common Vulnerability Scoring System (CVSS) v2
CVSS Base Score: <7.8>
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/71805 for the
current score CVSS Environmental Score*: <Undefined >
Base Score Metrics:
Related exploit range/Attack Vector: < Network >
Access Complexity: < Low >
Authentication < None >
Confidentiality Impact: < None >
Integrity Impact: < None>
Availability Impact: < Complete >
Temporal Score Metrics:
Exploitability: < Proof of Concept>
Remediation Level: < Official Fix >
Report Confidence: < Confirmed >
CVSS v2 Complete Documentation
CVSS v2 Online Calculator
*The CVSS Environment Score is customer environment-specific and will
ultimately impact the Overall CVSS Score. Customers can evaluate the impact
of this vulnerability in their environments by accessing the referenced links.
Note: According to the Forum of Incident Response and Security Teams (FIRST),
the Common Vulnerability Scoring System (CVSS) is an "industry open standard
designed to convey vulnerability severity and help to determine urgency and
priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY
OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT
OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
This vulnerability was reported to IBM by Fortiguard Labs. See the following
link for more information.
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