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Fastream NETFile FTP/Web Server FTP Bounce Vulnerability
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Secunia Advisory:
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SA15394
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Release Date:
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2005-05-17
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Last Update:
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2005-05-19
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Popularity:
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5,052 views
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Critical:
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Less critical
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Impact:
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Security Bypass
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| Software: | Fastream NETFile FTP/Web Server 7.x
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| CVE reference: | CVE-2005-1646
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Description:
Tan Chew Keong has reported a vulnerability in Fastream NETFile FTP/Web Server, which potentially can be exploited by malicious users to bypass certain security restrictions.
The vulnerability is caused due to missing validation of the IP address specified as argument to the PORT command and can be exploited via so-called "FTP Bounce" attacks to open connections to arbitrary systems via the FTP server.
Successful exploitation may allow bypassing of firewall filters and access systems, which would otherwise be unaccessible.
This can also be exploited further to cause a DoS (Denial of Service) by uploading a specially crafted text file or access the admin interface (port 30000/tcp).
The vulnerability has been reported in version 7.4.6. Other versions may also be affected.
Solution:
Update to version 7.6 and disable FXP support.
Grant only trusted users access to the FTP service.
Provided and/or discovered by:
Tan Chew Keong
Changelog:
2005-05-19: Added CVE reference.
Original Advisory:
http://www.security.org.sg/vuln/netfileftp746port.html
Other References:
CERT Advisory CA-1997-27 FTP Bounce:
http://www.cert.org/advisories/CA-1997-27.html
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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