From: Wojtek <sopel@nemezis.ipan.lublin.pl> To: freebsd-security@freebsd.org Subject: KKIS.05051999.003b (fwd) Message-ID: <Pine.BSF.4.05.9905062211220.20699-200000@nemezis.ipan.lublin.pl>
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--1958937097-2116286281-925896381=:17696
Content-Type: TEXT/PLAIN; CHARSET=US-ASCII
Content-ID: <Pine.BSF.4.05.9905062211222.20699@nemezis.ipan.lublin.pl>
have a look at this.
---------- Forwarded message ----------
Date: Wed, 5 May 1999 11:26:21 +0200
From: Lukasz Luzar <lluzar@SECURITY.KKI.PL>
To: BUGTRAQ@NETSPACE.ORG
Subject: KKIS.05051999.003b
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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S E C U R I T Y
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~[ Contacts ]~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
KKI Security Team Cracow Commercial Internet
http://www.security.kki.pl http://www.kki.pl
mailto:security@security.kki.pl mailto:biuro@kki.pl
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~[ Informations ]~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Report title : Security problem with sockets in FreeBSD's
implementation of UNIX-domain protocol family.
Problem found by : Lukasz Luzar (lluzar@security.kki.pl)
Report created by : Robert Pajak (shadow@security.kki.pl)
Lukasz Luzar (lluzar@security.kki.pl)
Raport published : 5th May 1999
Raport code : KKIS.05051999.003.b
Systems affected : FreeBSD-3.0 and maybe 3.1,
Archive : http://www.security.kki.pl/advisories/
Risk level : high
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~[ Description ]~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
As you know, "The UNIX-domain protocol family is a collection of protocols
that provides local interprocess communication through the normal socket
mechanism. It supports the SOCK_STREAM and SOCK_DGRAM soceket types and uses
filesystem pathnames for addressing."
The SOCK_STREAM sockets also supports the communication of UNIX file
descriptors through the use of functions sendmsg() and recvmsg().
While testing UNIX-domain protocols, we have found probable bug in
FreeBSD's implementation of this mechanism.
When we had run attached example on FreeBSD-3.0 as local user, system
had crashed imediatelly with error "Supervisor read, page not present"
in kernel mode.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~[ Example ]~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Look to attached example.
~~~~~~~~~~~~~~~~~~~~~~~~~~[ Copyright statement ]~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Copyright (c) 1999 KKI Security Team, Poland
All rights reserved.
All questions please address to mailto:security@security.kki.pl
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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--1958937097-2116286281-925896381=:17696--
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