Multiple vulnerabilities in SAPlpd 6.28

2008-02-0600:00:00

vulners.com

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                         Luigi Auriemma

Application: SAPlpd
http://www.sap.com
Versions: <= 6.28 (included in SAP GUI 7.10)
Platforms: Windows
Bugs: various vulnerabilities
Exploitation: remote
Date: 04 Feb 2008
Author: Luigi Auriemma
e-mail: [email protected]
web: aluigi.org

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1) Introduction
2) Bugs
3) The Code
4) Fix

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1) Introduction

SAPlpd is a small and very old (2001) line printer daemon for Windows
which is included in the SAP GUI package.

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2) Bugs

The daemon is affected by various vulnerabilities which, for brevity,
I have decided to list through the lpd commands (in hex) accepted by
the program:

commands type of bug
01 31 memcpy
02 32 memcpy + sprintf "Receive job for printer %s (berkley protocol)\n"
03 04 33 34 sprintf "QUERY = %s\n" + multiple strcpy
05 35 multiple strcpy
53 server termination

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