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NGC Active FTPServer Multiple Command Buffer Overflows
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Secunia Advisory:
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SA9036
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Release Date:
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2003-06-16
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Popularity:
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5,184 views
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Critical:
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Highly critical
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Impact:
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DoS
System access
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Where:
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From remote
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Solution Status:
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Unpatched
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| Software: | NGC Active FTPServer 2002
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Description:
Multiple vulnerabilities have been reported in NGC Active FTPServer, which can be exploited by malicious people to cause a DoS (Denial of Service) on a vulnerable system or potentially compromise it.
The vulnerabilities are caused due to boundary errors when handling input for various commands. A malicious person can reportedly exploit this to cause a buffer overflow by supplying more than 25001 bytes of input to the "USER" command. This will cause the FTP server to crash and may potentially allow execution of arbitrary code.
Malicious, authenticated users can also exploit the following commands to cause buffer overflows:
- CWD
- LS
- GET
- MKDIR
The vulnerabilities have been reported in version 2.40. However, prior versions may also be affected.
Solution:
Reportedly, the vendor states that the vulnerabilities will be fixed in the next version (2003), which will be released in August.
In the meantime, filter traffic in a FTP proxy and allow only trusted users access to the FTP server.
Provided and/or discovered by:
Ziv Kamir
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About this Secunia Advisory
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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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