Secunia Research: Danske Bank e-Sec Control Module Error Logging Buffer Overflow

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                 Secunia Research 16/04/2009

• Danske Bank e-Sec Control Module Error Logging Buffer Overflow -

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Table of Contents

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

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1) Affected Software

• Danske Bank Danske e-Sec Control Module ActiveX control
  (DanskeSikker.ocx) version 3.1.0.48.

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) Description of Vulnerability

Secunia Research has discovered a vulnerability in Danske Bank Danske
e-Sec Control Module ActiveX control, which can be exploited by
malicious people to compromise a user's system.

The vulnerability is caused by a boundary error in DanskeSikker.ocx
within an error logging function. This can be exploited to cause a
stack-based buffer overflow by passing overly long input to certain
methods when the ActiveX control has been initialised in a specific
manner.

Successful exploitation allows execution of arbitrary code when e.g.
visiting a malicious web site.

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4) Solution

Set the kill-bit for the ActiveX control.

The vendor is reportedly working on a fix.

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5) Time Table

16/04/2008 - Vendor notified.
16/04/2008 - Vendor response.
25/06/2008 - Status update requested.
27/06/2008 - Vendor response (responsible person is on holiday, but
will provide status update ASAP).
24/07/2008 - Status update requested.
13/08/2008 - Status update requested.
13/08/2008 - Vendor response.
25/08/2008 - Status update requested.
18/09/2008 - Vendor informed that advisory is going out today.
18/09/2008 - Vendor calls asking for extension.
05/11/2008 - Status update requested.
05/11/2008 - Vendor response (currently no progress).
10/11/2008 - Vendor informed about Secunia Reserach disclosure policy
and informed that a new status update will be requested
in a couple of months.
02/03/2009 - Status update requested.
11/03/2009 - Status update requested again.
17/03/2009 - Vendor provides status update (working on a fix).
20/03/2009 - Vendor reminded of Secunia Research disclosure policy.
Advisory will not be coordinated for more than 1 year.
16/04/2009 - Public disclosure.

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6) Credits

Discovered by Carsten Eiram, Secunia Research.

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7) References

The Common Vulnerabilities and Exposures (CVE) project has assigned
CVE-2008-1107 for the vulnerability.

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8) About Secunia

Secunia offers vulnerability management solutions to corporate
customers with verified and reliable vulnerability intelligence
relevant to their specific system configuration:

http://secunia.com/advisories/business_solutions/

Secunia also provides a publicly accessible and comprehensive advisory
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http://secunia.com/advisories/

Secunia believes that it is important to support the community and to
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security and reliability of software in general:

http://secunia.com/secunia_research/

Secunia regularly hires new skilled team members. Check the URL below
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http://secunia.com/corporate/jobs/

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http://secunia.com/advisories/mailing_lists/

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9) Verification

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2008-17/

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

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