Secunia Research: Lotus Notes EML Reader Buffer Overflows
======================================================================
Secunia Research 08/04/2008
- Lotus Notes EML Reader Buffer Overflows -
======================================================================
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
======================================================================
1) Affected Software
* Lotus Notes 8.0
NOTE: Other versions may also be affected.
======================================================================
2) Severity
Rating: Highly critical
Impact: System compromise
Where: Remote
======================================================================
3) Vendor's Description of Software
"Security-rich software that enables businesses to communicate,
collaborate and increase productivity."
Product Link:
http://www-306.ibm.com/software/lotus/
======================================================================
4) Description of Vulnerability
Secunia Research has discovered multiple vulnerabilities in Lotus
Notes, which can be exploited by malicious people to compromise a
user's system.
1) A boundary error in the EML reader (emlsr.dll) when parsing certain
headers ("To:", "Cc:", "Bcc:", "From:", "Date:", "Subject:",
"Priority:", "Importance:", and "X-MSMail-Priority:") in EML files can
be exploited to cause a heap-based buffer overflow via an overly long
string.
2) A boundary error in the EML reader (emlsr.dll) when encountering the
beginning of RFC2047 encoded-words in headers can be exploited to cause
a heap-based buffer overflow via an overly long string.
3) A boundary error in the EML reader (emlsr.dll) when parsing the text
string in RFC2047 encoded-words in headers can be exploited to cause a
heap-based buffer overflow via an overly long string.
4) A boundary error in the EML reader (emlsr.dll) when creating a
filename based on the subject in an EML file can be exploited to cause
a heap-based buffer overflow via an overly long string.
======================================================================
5) Solution
Apply patch available from the vendor.
======================================================================
6) Time Table
08/11/2007 - Vendor notified.
08/11/2007 - Vendor response.
08/04/2008 - Public disclosure.
======================================================================
7) Credits
Discovered by Carsten Eiram, Secunia Research.
======================================================================
8) References
The Common Vulnerabilities and Exposures (CVE) project has assigned
CVE-2007-5399 for the vulnerabilities.
======================================================================
9) About Secunia
Secunia offers vulnerability management solutions to corporate
customers with verified and reliable vulnerability intelligence
relevant to their specific system configuration:
http://corporate.secunia.com/
Secunia also provides a publicly accessible and comprehensive advisory
database as a service to the security community and private
individuals, who are interested in or concerned about IT-security.
http://secunia.com/
Secunia believes that it is important to support the community and to
do active vulnerability research in order to aid improving the
security and reliability of software in general:
http://corporate.secunia.com/secunia_research/33/
Secunia regularly hires new skilled team members. Check the URL below
to see currently vacant positions:
http://secunia.com/secunia_vacancies/
Secunia offers a FREE mailing list called Secunia Security Advisories:
http://secunia.com/secunia_security_advisories/
======================================================================
10) Verification
Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2007-92/
Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/
======================================================================