Title: TransSoft Broker CWD Buffer Overflow Vulnerability
Severity: HIGH
Description:
Broker is a Windows FTP server from TransSoft.
Versions of Broker are vulnerable to a denial of service.
A CD or CWD command, argumented by an invalid '. .' (dot-space-dot) sequence can, if repeatedly issued, create a buffer overflow causing the server to halt, requiring a restart.
While the exploitability of this overflow is unverified, the initial advisory notes that the Broker error log (C:\Program Files\TransSoft Ltd\Broker 5\Data\Errors.log)records an access violation "at offsets definitely taken from the input string. (like 20202020, 2020202E etc...)" (courtesy ByteRage <byterage@yahoo.com>)
Affected Products:
- TransSoft Broker FTP Server 3.0.0 Build 1
- TransSoft Broker FTP Server 4.0.0
- TransSoft Broker FTP Server 4.7.0 .5.0
- TransSoft Broker FTP Server 5.0.0
- TransSoft Broker FTP Server 5.1.0
- TransSoft Broker FTP Server 5.7.0
- TransSoft Broker FTP Server 5.9.5 .0
References:
- TransSoft: Broker FTP Server
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