Multiple Vendor kon2 Local Buffer Overflow Vulnerability

BID:7790

Info

Multiple Vendor kon2 Local Buffer Overflow Vulnerability

Bugtraq ID: 7790
Class: Boundary Condition Error
CVE: CVE-2002-1155
Remote: No
Local: Yes
Published: Jun 03 2003 12:00AM
Updated: Jul 11 2009 10:06PM
Credit: Discovery of this vulnerability credited to Janusz Niewiadomski.
Vulnerable: Redhat kon2-0.3.9b-7.i386.rpm
+ Redhat Linux 7.3
+ Redhat Linux 7.2
Redhat kon2-0.3.9b-6.i386.rpm
+ Redhat Linux 7.1
Redhat kon2-0.3.9b-16.i386.rpm
+ Redhat Linux 9.0 i386
 Redhat kon2-0.3.9b-13.i386.rpm
+ Redhat Linux 8.0
kon2 kon2 0.3.9 b
+ Gentoo Linux 1.4 _rc3
 + Gentoo Linux 1.4 _rc2
 + MandrakeSoft Corporate Server 2.1
+ Mandriva Linux Mandrake 9.1
+ Mandriva Linux Mandrake 9.0
+ Mandriva Linux Mandrake 8.2
Not Vulnerable:

Discussion

Multiple Vendor kon2 Local Buffer Overflow Vulnerability

A buffer overflow vulnerability has been reported for the kon2 utility shipped with various Linux distributions. Exploitation of this vulnerability may result in a local attacker obtaining elevated privileges on a vulnerable system.

The vulnerability exists due to insufficient bounds checking performed on some commandline options passed to the vulnerable utility.

Exploit / POC

Multiple Vendor kon2 Local Buffer Overflow Vulnerability

The following proof of concept exploits have been supplied by priv8security and c0ntex <[email protected]> respectively.

Solution / Fix

Multiple Vendor kon2 Local Buffer Overflow Vulnerability

Solution:
Gentoo Linux has released an advisory. Users who have installed app-i18n/kon2 are advised to upgrade to kon2-0.3.9b-r1 by issuing the following commands:

emerge sync
emerge kon2
emerge clean

Fixes available:


Redhat kon2-0.3.9b-16.i386.rpm

Redhat kon2-0.3.9b-7.i386.rpm

Redhat kon2-0.3.9b-6.i386.rpm

Redhat kon2-0.3.9b-13.i386.rpm

kon2 kon2 0.3.9 b

References

Multiple Vendor kon2 Local Buffer Overflow Vulnerability

References:

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