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XM Easy Personal FTP Server USER/PORT Vulnerabilities
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Secunia Advisory:
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SA19970
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Release Date:
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2006-05-05
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Last Update:
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2006-07-20
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Popularity:
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6,269 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: | XM Easy Personal FTP Server 4.x
XM Easy Personal FTP Server 5.x
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| CVE reference: | CVE-2006-2226
CVE-2006-2225
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Description:
Three vulnerabilities have been discovered in XM Easy Personal FTP Server, which can be exploited by malicious users to cause a DoS (Denial of Service), and by malicious people to cause a DoS and potentially compromise a vulnerable system.
1) A boundary error exists 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. Other versions may also be affected.
2) A format string error exists when displaying the server log using the username received via the USER command. This can potentially be exploited to execute arbitrary code via specially crafted username 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. Other versions may also be affected.
3) A boundary error exists within the handling of the PORT command. This can be exploited to cause out-of-bounds memory access via overly long arguments passed to the command.
The vulnerability has been confirmed in version 4.3 and 5.0.2, and has also been reported in version 5.0.1. Other versions may also be affected.
Solution:
Filter malicious requests in a proxy or firewall with FTP filtering capabilities.
Provided and/or discovered by:
1) Muhammad Ahmed Siddiqui
2) Sol
3) luka.research
Additional information by:
Jerome Athias
Changelog:
2006-05-08: Added information of additional vulnerability.
2006-05-17: Added information of additional vulnerability.
2006-06-26: Updated affected versions.
2006-07-20: Added CVE reference.
Original Advisory:
http://www.milw0rm.com/exploits/1552
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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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