[Full-disclosure] Secunia Research: FileCOPA Directory Argument Handling Buffer Overflow

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                 Secunia Research 25/07/2006

  - FileCOPA Directory Argument Handling Buffer Overflow -

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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

FileCOPA 1.01 released 2006-07-18.

NOTE: Other versions may also be affected.

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2) Severity

Rating: Moderate (High with anonymous access enabled)
Impact: System compromise
Where: Remote

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3) Vendor's Description of Software

"FileCOPA takes the hard work out of running an FTP Server. The
FileCOPA FTP Server Software installs on any version of the Microsoft
Windows operating system with just a few clicks of the mouse and
automatically configures itself for anonymous operation."

Product Link:
http://www.filecopa.com/

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4) Description of Vulnerability

Secunia Research has discovered a vulnerability in FileCOPA, which can
be exploited by malicious users to compromise a vulnerable system.

The vulnerability is caused due to an integer underflow error in the
FTP service (filecpnt.exe) when processing directory arguments passed
to certain FTP commands (e.g. "CWD", "DELE", "MDTM", and "MKD"). This
can be exploited to cause a stack-based buffer overflow by passing a
specially crafted, overly long argument to one of the affected FTP
commands.

Successful exploitation allows execution of arbitrary code.

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5) Solution

Update to version 1.01 released 2006-07-21.

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6) Time Table

21/07/2006 - Vendor notified.
21/07/2006 - Vendor response.
25/07/2006 - 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
CVE-2006-3768 for the vulnerability.

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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/2006-55/

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

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