Secunia Security Advisory - Muhammad Ahmed Siddiqui has discovered a vulnerability in XM Easy Personal FTP Server, which can be exploited by malicious people to cause a DoS (Denial of Service) and potentially compromise a vulnerable system.
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TITLE:
XM Easy Personal FTP Server USER Command Vulnerability
SECUNIA ADVISORY ID:
SA19970
VERIFY ADVISORY:
http://secunia.com/advisories/19970/
CRITICAL:
Highly critical
IMPACT:
DoS, System access
WHERE:
>From remote
SOFTWARE:
XM Easy Personal FTP Server 4.x
http://secunia.com/product/9760/
DESCRIPTION:
Muhammad Ahmed Siddiqui has discovered a vulnerability in XM Easy
Personal FTP Server, which can be exploited by malicious people to
cause a DoS (Denial of Service) and potentially compromise a
vulnerable system.
The vulnerability is caused due to a boundary error within the
handling of the USER command. This can be exploited to cause a
heap-based buffer overflow via overly long arguments passed to the
command.
Successful exploitation crashes the FTP server and may allow
arbitrary code execution.
The vulnerability has been confirmed in version 4.3. Prior versions
may also be affected.
SOLUTION:
Filter malicious requests in a proxy or firewall with FTP filtering
capabilities.
PROVIDED AND/OR DISCOVERED BY:
Muhammad Ahmed Siddiqui
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