Code execution in Icecast 2.0.1
From: Luigi Auriemma (aluigi_at_autistici.org)
Date: 09/28/04
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Date: Tue, 28 Sep 2004 18:49:43 +0000 To: bugtraq@securityfocus.com, bugs@securitytracker.com, news@securiteam.com, full-disclosure@lists.netsys.com, vuln@secunia.com
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Luigi Auriemma
Application: Icecast
http://www.icecast.org
Versions: <= 2.0.1
Platforms: only Win32 seems vulnerable but other platforms could be
affected in some conditions
Bug: array overflow
Risk: critical
Exploitation: remote
Date: 28 September 2004
Author: Luigi Auriemma
e-mail: aluigi@altervista.org
web: http://aluigi.altervista.org
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1) Introduction
2) Bug
3) The Code
4) Fix
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===============
1) Introduction
===============
Icecast is an audio broadcast system that streams music in both MP3 and
Ogg Vorbis format.
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======
2) Bug
======
The Icecast server accepts a maximum of 32 headers in the clients HTTP
request.
In some environments (like in Win32) a request with more than 31
headers causes the overwriting of the return address of the vulnerable
function with a pointer to the beginning of the 32th header.
In short, is possible to execute remote code simply using the normal
HTTP request plus 31 headers followed by a shellcode that will be
executed directly without the need of calling/jumping to registers or
addresses or using other annoying techniques.
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===========
3) The Code
===========
http://aluigi.altervista.org/poc/iceexec.zip
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======
4) Fix
======
Version 2.0.2
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---
Luigi Auriemma
http://aluigi.altervista.org
- Previous message: gandalf_at_digital.net: "RE: Diebold Global Election Management System (GEMS) Backdoor Account Allows Authenticated Users to Modify Votes"
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