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pyftpdlib FTP Server Denial of Service Vulnerability
Information
Severity
Severity
Medium
Family
Family
FTP
CVSSv2 Base
CVSSv2 Base
4.3
CVSSv2 Vector
CVSSv2 Vector
AV:N/AC:M/Au:N/C:N/I:N/A:P
Solution Type
Solution Type
Vendor Patch
Created
Created
13 years ago
Modified
Modified
5 years ago
Summary
This host is running pyftpdlib FTP server and is prone to Denial of Service vulnerability.
Insight
Insight
The flaw is due to race condition in the FTPHandler class, which allows remote attackers to cause a denial of service by establishing and then immediately closing a TCP connection, leading to the accept function having an unexpected return value of None.
Affected Software
Affected Software
ftpserver.py in pyftpdlib before 0.5.1
Solution
Solution
Upgrade to pyftpdlib version 0.5.2 or later.