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aeon02a.txt

aeon02a.txt
Posted Apr 17, 2005
Authored by patr0n | Site security-tmp.h14.ru

Aeon versions 0.2a and below suffer from a locally exploitable buffer overflow.

tags | advisory, overflow
SHA-256 | 47756df3fd4a0fd00b44d0cd3d44e8997cf5effb93d26617996f99e9e25298f7

aeon02a.txt

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#######################################################################

Application: Aeon
http://www.abenetkiewicz.neostrada.pl
Versions: <= 0.2a
Platforms: Linux
Bug: buffer-overflow
Exploitation: local
Date: 04 Apr 2005
Author: patr0n
e-mail: patr0n@nm.ru
web: http://security-tmp.h14.ru

#######################################################################

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

#######################################################################

===============
1) Introduction
===============

Aeon is mail relay agent for Linux. It uses only personal configuration
files, it does not have any support for aliases, groupmail etc.
No advanced technology included :) It is not a daemon, it just takes
the message from MUA and relays it to your smtp server. Nothing more,
nothing less.

#######################################################################

======
2) Bug
======

The application is affected by a buffer-overflow in the function
getConfig().
This function uses a strcpy() with a local buffer of 512 bytes where
it stores the text from environment HOME.

lib_aeon.c:
//--------------cut------------------

int getConfig(char settings[MAX_SETTINGS][MAX_LEN])
{
char home[MAX_LEN];
//...................................
strcpy(home, getenv("HOME"));

//--------------cut------------------

The result is that an attacker could raise his privileges.

#######################################################################

===========
3) The Code
===========

You can view POC code from
http://security-tmp.h14.ru/exploits/23laeon.c.txt

#######################################################################

======
4) Fix
======

No fix.

#######################################################################

---
patr0n
http://security-tmp.h14.ru
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