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             AUSCERT External Security Bulletin Redistribution

Stack buffer overflow vulnerability in Lotus Domino iCalendar functionality
                             17 September 2010


        AusCERT Security Bulletin Summary

Product:           Lotus Domino iCalendar
Publisher:         IBM
Operating System:  AIX
                   Linux variants
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2010-3407  

Original Bulletin: 

Revision History:  September 17 2010: Added CVE
                   September 15 2010: Initial Release

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Stack buffer overflow vulnerability in Lotus Domino iCalendar functionality
 Flash (Alert)
MWR InfoSecurity and TippingPoint's Zero Day Initiative (ZDI) contacted IBM 
Lotus to report a potential buffer overflow vulnerability with the Lotus 
Domino iCalendar functionality.

It is possible to cause a buffer overflow situation based on the iCalendar 
content included in a calendar invitation.

To exploit this vulnerability, an attacker would have to send an iCalendar 
invitation with specific parameters. The vulnerability is exposed when the 
Domino server goes to process that content which could result in remote 
execution of code.

For related information, see the following advisories:

    * MWR InfoSecurity: http://labs.mwrinfosecurity.com/advisories/lotus_domino_ical_stack_buffer_overflow
    * TippingPoint's ZDI: http://zerodayinitiative.com/advisories

Recommended Fix

This issue was reported to Quality Engineering as SPR# NRBY7ZPJ9V. To address 
the issue, customers are encouraged to upgrade to the following releases:

    * 8.5.2 (release notice)
    * 8.5.1 Fix Pack 2 (release notice)
    * 8.0.2 Fix Pack 5 (release notice) 


There are no known workarounds.

Security Rating using Common Vulnerability Scoring System (CVSS) v2
CVSS Base Score: < 9.3 >
- ---- Impact Subscore: < 10 >
- ---- Exploitability Subscore: < 8.6 >
CVSS Temporal Score: < 7.3 >
CVSS Environmental Score: < Undefined* >
Overall CVSS Score: < 7.3 >

Base Score Metrics:

    * Related exploit range/Attack Vector: < Network >
    * Access Complexity: < Medium >
    * Authentication < None >
    * Confidentiality Impact: < Complete >
    * Integrity Impact: < Complete >
    * Availability Impact: < Complete >

Temporal Score Metrics:

    * Exploitability: < Proof of Concept Code >
    * 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.
Cross Reference information
Segment 	Messaging Applications	
Product 	Lotus Notes
Component 	Calendaring and Scheduling
Copyright and trademark information
IBM, the IBM logo and ibm.com are trademarks of International Business 
Machines Corp., registered in many jurisdictions worldwide. Other product and 
service names might be trademarks of IBM or other companies. A current list of 
IBM trademarks is available on the Web at "Copyright and trademark information"
at www.ibm.com/legal/copytrade.shtml.

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