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TITLE:
Home Ftp Server Directory Traversal Vulnerability

SECUNIA ADVISORY ID:
SA16556

VERIFY ADVISORY:
http://secunia.com/advisories/16556/

CRITICAL:
Moderately critical

IMPACT:
Exposure of system information, Exposure of sensitive information

WHERE:
>From remote

SOFTWARE:
Home FTP Server 1.x
http://secunia.com/product/5617/

DESCRIPTION:
Donato Ferrante has discovered a vulnerability in Home FTP Server,
which can be exploited by malicious users to access arbitrary files
on a vulnerable system.

The vulnerability is caused due to an input validation error making
it possible to escape the FTP root and retrieve arbitrary files on
the system via directory traversal attacks using the "../../"
character sequence.

The vulnerability has been confirmed in version r1.0.7 (build 45).
Other versions may also be affected.

SOLUTION:
Filter malicious characters and character sequences in a FTP proxy.

Grant only access to trusted users.

The impact of directory traversal attacks can be lessened by placing
the FTP root on a separate drive letter or by restricting access
using NTFS.

PROVIDED AND/OR DISCOVERED BY:
Donato Ferrante

ORIGINAL ADVISORY:
http://www.autistici.org/fdonato/advisory/HomeFtpServer1.0.7-adv.txt

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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