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securityvulnsSecurityvulnsSECURITYVULNS:DOC:11376
HistoryFeb 11, 2006 - 12:00 a.m.

Secunia Research: Lotus Notes HTML Speed Reader Link Buffer Overflows

2006-02-1100:00:00
vulners.com
13

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                 Secunia Research 10/02/2006

  - Lotus Notes HTML Speed Reader Link Buffer Overflows -

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Table of Contents

Affected Software…1
Severity…2
Vendor's Description of Software…3
Description of Vulnerability…4
Solution…5
Time Table…6
Credits…7
References…8
About Secunia…9
Verification…10

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1) Affected Software

IBM Lotus Notes 6.5.4 and 7.0.

NOTE: Other versions may also be affected.

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2) Severity

Rating: Highly critical
Impact: System Compromise
Where: Remote

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3) Vendor's Description of Software

"IBM Lotus Notes continues to set the standard for innovation in the
messaging and collaboration market Lotus defined over a decade ago.
As an integrated collaborative environment, the Lotus Notes client
and the IBM Lotus Domino server combine enterprise-class messaging
and calendaring & scheduling capabilities with a robust platform for
collaborative applications".

Product Link:
http://www.lotus.com/products/product4.nsf/wdocs/noteshomepage

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4) Description of Vulnerability

Secunia Research has discovered two vulnerabilities in Lotus Notes,
which can be exploited by malicious people to compromise a user's
system.

1) A boundary error exists in the HTML speed reader (htmsr.dll),
which is used for viewing HTML attachments in emails. This can be
exploited to cause a stack-based buffer overflow via a malicious
email containing an overly long link (about 800 characters) beginning
with either "http", "ftp", or "//".

Successful exploitation allows execution of arbitrary code with the
privileges of the user running Lotus Notes, but requires that the user
follows a link in the HTML document.

2) A boundary error in the HTML speed reader when checking if
a link references a local file can be exploited to cause a stack-
based buffer overflow via a malicious email containing a specially
crafted, overly long link.

Successful exploitation allows execution of arbitrary code with the
privileges of the user running Lotus Notes, as soon as the user views
the malicious HTML document.

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5) Solution

Update to version 6.5.5 or 7.0.1.

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6) Time Table

06/08/2005 - Vendor notified.
07/08/2005 - Vendor response.
10/02/2006 - Public disclosure.

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7) Credits

Discovered by Carsten Eiram, Secunia Research.

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8) References

The Common Vulnerabilities and Exposures (CVE) project has assigned
candidate number CAN-2005-2618 for the vulnerabilities.

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9) About Secunia

Secunia collects, validates, assesses, and writes advisories regarding
all the latest software vulnerabilities disclosed to the public. These
advisories are gathered in a publicly available database at the
Secunia website:

http://secunia.com/

Secunia offers services to our customers enabling them to receive all
relevant vulnerability information to their specific system
configuration.

Secunia offers a FREE mailing list called Secunia Security Advisories:

http://secunia.com/secunia_security_advisories/

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10) Verification

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2005-32/

Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/

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