From owner-doc-jp@jp.freebsd.org  Fri Dec 29 23:44:09 2000
Received: (from daemon@localhost)
	by castle.jp.freebsd.org (8.9.3+3.2W/8.7.3) id XAA50414;
	Fri, 29 Dec 2000 23:44:09 +0900 (JST)
	(envelope-from owner-doc-jp@jp.FreeBSD.org)
Received: from eos.ocn.ne.jp (eos.ocn.ne.jp [210.190.142.171])
	by castle.jp.freebsd.org (8.9.3+3.2W/8.7.3) with ESMTP id XAA50409
	for <doc-jp@jp.freebsd.org>; Fri, 29 Dec 2000 23:44:09 +0900 (JST)
	(envelope-from hrs@eos.ocn.ne.jp)
Received: from mail.hrslab.yi.org (p0086-ip01funabasi.chiba.ocn.ne.jp [211.123.225.86])
	by eos.ocn.ne.jp (8.9.1a/OCN/) with ESMTP id XAA23923
	for <doc-jp@jp.freebsd.org>; Fri, 29 Dec 2000 23:44:07 +0900 (JST)
Message-Id: <200012291444.XAA23923@eos.ocn.ne.jp>
Received: from localhost (alph.hrslab.yi.org [192.168.0.10])
	by mail.hrslab.yi.org (8.9.3/3.7W/DomainMaster) with ESMTP id XAA21107
	for <doc-jp@jp.freebsd.org>; Fri, 29 Dec 2000 23:42:55 +0900 (JST)
	(envelope-from hrs@eos.ocn.ne.jp)
To: doc-jp@jp.freebsd.org
In-Reply-To: <200012241844.DAA28060@eos.ocn.ne.jp>
References: <20001220142854.6BE3137B400@hub.freebsd.org>
	<200012241844.DAA28060@eos.ocn.ne.jp>
Content-Type: Multipart/Mixed;
 boundary="--Next_Part(Fri_Dec_29_23:41:21_2000_518)--"
Content-Transfer-Encoding: 7bit
X-Mailer: Mew version 1.94.1 on Emacs 20.7 / Mule 4.0 (HANANOEN)
Mime-Version: 1.0
Date: Fri, 29 Dec 2000 23:42:53 +0900
From: Hiroki Sato <hrs@eos.ocn.ne.jp>
X-Dispatcher: imput version 20000228(IM140)
Lines: 226
Reply-To: doc-jp@jp.freebsd.org
Precedence: list
X-Distribute: distribute version 2.1 (Alpha) patchlevel 24e+000315
X-Sequence: doc-jp 7919
Subject: [doc-jp 7919] Re: ANNOUNCE: FreeBSD Ports Security Advisory:
 FreeBSD-SA-00:78.bitchx
Errors-To: owner-doc-jp@jp.freebsd.org
Sender: owner-doc-jp@jp.freebsd.org
X-Originator: hrs@eos.ocn.ne.jp

----Next_Part(Fri_Dec_29_23:41:21_2000_518)--
Content-Type: Text/Plain; charset=iso-2022-jp
Content-Transfer-Encoding: 7bit

$B:4F#!wEl5~M}2JBg3X$G$9!#(B

 revised $BHG$G$9!#(B


----Next_Part(Fri_Dec_29_23:41:21_2000_518)--
Content-Type: Text/Plain; charset=iso-2022-jp
Content-Disposition: attachment; filename="00:78"
Content-Transfer-Encoding: 7bit


FreeBSD $B%;%-%e%j%F%#4+9p(B $BF|K\8lHG(B
=============================================================================
FreeBSD-SA-00:78 (2000-12-29)
 * bitchx/ko-bitchx allows remote code execution [REVISED]
=============================================================================

 $B$3$N%a!<%k$O(B, announce-jp $B$KN.$l$?(B

  Subject: ANNOUNCE: FreeBSD Ports Security Advisory: FreeBSD-SA-00:78.bitchx [REVISED]
  From: FreeBSD Security Advisories <security-advisories@FreeBSD.org>
  Date: Fri, 29 Dec 2000 05:53:10 -0800 (PST)
  Message-Id: <20001229135310.9260737B400@hub.freebsd.org>
  X-Sequence: announce-jp 645

 $B$rF|K\8lLu$7$?$b$N$G$9(B. 

 $B86J8$O(B PGP $B=pL>$5$l$F$$$^$9$,(B, $B$3$NF|K\8lLu$O(B PGP $B=pL>$5$l$F$$$^$;$s(B. 
 $B=$@5%Q%C%AEy$NFbMF$,2~cb$5$l$F$$$J$$$3$H$r3NG'$9$k$?$a$K(B PGP $B=pL>$N(B
 $B%A%'%C%/$r9T$J$&$K$O(B, $B86J8$r;2>H$7$F$/$@$5$$(B. 

 $BF|K\8lLu$*$h$S(B, $B%_%i!<%5%$%HMxMQ$N>\:Y$K$D$$$F$O(B, $BJ8Kv$N!V(BA. FreeBSD
 $B%;%-%e%j%F%#4+9p(B $BF|K\8lHG$K$D$$$F!W$r$4Mw$/$@$5$$(B.


                                     [$BK]Lu<T(B: $B:4F#(B $B9-@8(B <hrs@jp.FreeBSD.org>]
--($B$3$3$+$i(B)

=============================================================================
FreeBSD-SA-00:78                                           Security Advisory
                                                                FreeBSD, Inc.

$B%H%T%C%/(B:	bitchx/ko-bitchx allows remote code execution [REVISED]

$BJ,N`(B:		ports
$B%b%8%e!<%k(B:	bitchx/ko-bitchx
$B9pCNF|(B:		2000-12-20
$B2~D{F|(B:         2000-12-29
$B%/%l%8%C%H(B:	nimrood <nimrood@ONEBOX.COM>
$B1F6AHO0O(B:	$B=$@5F|0JA0$N(B Ports Collection
$B=$@5F|(B:		2000-12-12
$B%Y%s%@$NBP1~(B:	$B=$@5HG$,8x3+:Q$_(B
FreeBSD $B$K8GM-$+(B:	NO

0.   $B2~D{MzNr(B - Revision History

v1.0  2000-12-20  $B=iHG8x3+(B
v1.1  2000-12-29  ko-bitchx $B$K$bF1MM$N<eE@$,B8:_$9$k$3$H$rCm5-(B


I.   $BGX7J(B - Background

bitchx is a popular IRC client.  It is available in a Korean-localized
version as the ko-bitchx package.

bitchx $B$O?M5$$N$"$k(B IRC $B%/%i%$%"%s%H$G$9(B.  ko-bitchx $B$H$$$&(B
$B4Z9q8lHG$b$"$j$^$9(B.

II.  $BLdBj$N>\:Y(B - Problem Description

The bitchx port, versions prior to 1.0c17_1, and ko-bitchx port,
versions prior to 1.0c16_3, contains a remote vulnerability.  Through
a stack overflow in the DNS parsing code, a malicious remote user in
control of their reverse DNS records may crash a bitchx session, or
cause arbitrary code to be executed by the user running bitchx.

bitchx port $B$N%P!<%8%g%s(B 1.0c17_1 $B$h$jA0$N$b$N$*$h$S(B,
ko-bitchx port $B$N%P!<%8%g%s(B 1.0c16_3 $B$h$jA0$N$b$N$K$O(B, $B%j%b!<%H$+$i(B
$B0-MQ2DG=$J%;%-%e%j%F%#>e$N<eE@$,B8:_$7$^$9(B.  DNS $B$N5U0z$-%l%3!<%I$r(B
$BA`:n$G$-$k(B, $B0-0U$r;}$C$?%j%b!<%H%f!<%6$O(B, DNS $B$N;z6g2r@O%3!<%I$K(B
$BB8:_$9$k%9%?%C%/%*!<%P%U%m!<LdBj$r0-MQ$9$k$3$H$G(B bitchx $B%;%7%g%s$r(B
$B%/%i%C%7%e$5$;$?$j(B, bitchx $B$r<B9T$7$F$$$k%f!<%6$N8"8B$GG$0U$N%3!<%I$r(B
$B<B9T$9$k$3$H$,2DG=$G$9(B.

The bitchx/ko-bitchx ports are not installed by default, nor are they
"part of FreeBSD" as such: they are part of the FreeBSD ports
collection, which contains over 4300 third-party applications in a
ready-to-install format.  The ports collections shipped with FreeBSD
3.5.1 and 4.2 contain this problem since it was discovered after the
releases.

FreeBSD makes no claim about the security of these third-party
applications, although an effort is underway to provide a security
audit of the most security-critical ports.

bitchx $B$*$h$S(B ko-bitchx $B$N(B port $B$O%G%U%)%k%H$G%$%s%9%H!<%k$5$l$k$b$N(B
$B$G$O$J$/(B, $B!V(BFreeBSD $B%7%9%F%`$N0lIt!W$r9=@.$9$k$b$N$G$b$"$j$^$;$s(B.
$B$=$l$i$O(B 4200 $B$r1[$($k%5!<%I%Q!<%F%#@=%"%W%j%1!<%7%g%s$,$9$0$K(B
$B%$%s%9%H!<%k$G$-$k7A$G<}$a$i$l$F$$$k(B FreeBSD Ports Collection $B$N0lIt$G$9(B.
$B%j%j!<%98e$KLdBj$,8+$D$+$C$?$?$a(B, FreeBSD 3.5.1 $B$*$h$S(B 4.2 $B$H$H$b$K(B
$B=P2Y$5$l$?(B Ports Collection $B$O$3$NLdBj$r4^$s$G$$$^$9(B.

FreeBSD $B$G$O(B, $B$3$N$h$&$J%5!<%I%Q!<%F%#@=%"%W%j%1!<%7%g%s$N%;%-%e%j%F%#(B
$BLdBj$KBP$7$F(B, $BFC$K2?$+$r<gD%$9$k$3$H$O$"$j$^$;$s(B ($BLuCm(B: Ports Collection $B$K(B
$BF~$C$F$$$k$+$i$H$$$C$F(B, FreeBSD $B$N3+H/<T$?$A$,$=$N%"%W%j%1!<%7%g%s$,(B
$B0BA4$G$"$k$HI>2A$7$?$o$1$G$O$"$j$^$;$s(B).  $B$?$@$7(B, $B%;%-%e%j%F%#LdBj$KBP$7$F(B
$BBg$-$J1F6A$r;}$D$h$&$J(B ports $B$KBP$9$k%;%-%e%j%F%#4F::$rDs6!$9$Y$/(B,
$B8=:_EXNOCf$G$9(B.

III. $B1F6AHO0O(B - Impact

Malicious remote users may execute arbitrary code as the user running
bitchx.

$B0-0U$r;}$C$?%j%b!<%H%f!<%6$O(B, bitchx $B$r<B9T$7$F$$$k%f!<%6$N8"8B$G(B
$BG$0U$N%3!<%I$r<B9T$9$k$3$H$,2DG=$G$9(B.
 
If you have not chosen to install the bitchx or ko-bitchx
port/packages, then your system is not vulnerable to this problem.

bitchx, $B$b$7$/$O(B ko-bitchx $B$N(B port/package $B$r%$%s%9%H!<%k$7$F$$$J$1$l$P(B
$B%7%9%F%`$K$3$NLdBj$K$h$k%;%-%e%j%F%#>e$N<eE@$O$"$j$^$;$s(B.

IV.  $B2sHrJ}K!(B - Workaround

Deinstall the bitchx port/package, if you have installed it.

bitchx $B$b$7$/$O(B ko-bitchx $B$N(B port/package $B$,%$%s%9%H!<%k$5$l$F$$$k>l9g$O(B,
$B$=$l$r%7%9%F%`$+$i:o=|$7$F$/$@$5$$(B.

V.   $B2r7h:v(B - Solution

One of the following:
$B<!$N$$$:$l$+$K=>$C$F$/$@$5$$(B.

1) Upgrade your entire ports collection and rebuild the bitchx or
ko-bitchx ports.
1) Ports Collection $BA4BN$r%"%C%W%0%l!<%I$7(B, bitchx $B$b$7$/$O(B
   ko-bitchx $B$N(B port $B$r:F9=C[$7$^$9(B.

2) Deinstall the old package and install a new package dated after the
correction date, obtained from:
2) $B8E$$(B ($BLuCm(B: bitchx $B$b$7$/$O(B ko-bitchx $B$N(B) package $B$r%7%9%F%`$+$i:o=|$7(B,
   $B=$@5F|0J9_$K:n@.$5$l$??7$7$$(B package $B$r0J2<$N>l=j$+$i<hF@$7$F(B
   $B%$%s%9%H!<%k$7$^$9(B.

[bitchx]

ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-3-stable/irc/BitchX-1.0c17_1.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/irc/BitchX-1.0c17_1.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/irc/BitchX-1.0c17_1.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/irc/BitchX-1.0c17_1.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/irc/BitchX-1.0c17_1.tgz

[ko-bitchx]
 
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-3-stable/korean/ko-BitchX-1.0c16_3.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/korean/ko-BitchX-1.0c16_3.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/korean/ko-BitchX-1.0c16_3.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/korean/ko-BitchX-1.0c16_3.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/korean/ko-BitchX-1.0c16_3.tgz

NOTE: It may be several days before updated ko-bitchx packages are
available.
$BCm0U(B: $B=$@5$5$l$?(B ko-bitchx $B$N(B package $B$,MxMQ$G$-$k$h$&$K$J$k$^$G(B,
      $B?tF|$+$+$k2DG=@-$,$"$j$^$9(B.

3) download a new port skeleton for the bitchx/ko-bitchx port from:
3) bitchx, $B$b$7$/$O(B ko-bitchx $B$N?7$7$$(B port $B%9%1%k%H%s$r0J2<$N>l=j$+$i(B
   $B%@%&%s%m!<%I$7(B, $B$=$l$r;H$C$F(B port $B$r:F9=C[$7$^$9(B.

http://www.freebsd.org/ports/

and use it to rebuild the port.

4) Use the portcheckout utility to automate option (3) above. The
portcheckout port is available in /usr/ports/devel/portcheckout or the
package can be obtained from:
4) $B>e5-(B (3) $B$NA`:n$r<+F0E*$K9T$J$&(B portcheckout $B%f!<%F%#%j%F%#$r;H$$$^$9(B.
   portcheckout $B$N(B port $B$O(B /usr/ports/devel/portcheckout $B$K$"$j$^$9(B.
   $B$^$?(B, portcheckout $B$N(B package $B$,0J2<$N>l=j$+$iF~<j2DG=$G$9(B.

ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-3-stable/devel/portcheckout-2.0.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/devel/portcheckout-2.0.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/devel/portcheckout-2.0.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/devel/portcheckout-2.0.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/devel/portcheckout-2.0.tgz


A.   FreeBSD $B%;%-%e%j%F%#4+9p(B $BF|K\8lHG$K$D$$$F(B

$BF|K\8lLu$O(B FreeBSD $BF|K\8l%I%-%e%a%s%F!<%7%g%s%W%m%8%'%/%H(B (doc-jp) $B$,(B
$B;29M$N$?$a$KDs6!$9$k$b$N$G$9(B.  $B2a5n$NF|K\8lHG%;%-%e%j%F%#4+9p$O(B

 http://www.FreeBSD.org/ja/security/

$B$K$^$H$a$i$l$F$$$^$9(B.  

$B$?$@$7(B, $BK]Lu<T$*$h$S(B doc-jp $B$O(B, $B$=$NFbMF$K$D$$$F$$$+$J$kJ]>Z$b(B
$B$$$?$7$^$;$s$N$G$4Cm0U$/$@$5$$(B.  $BF|K\8lLu$K$D$$$F$N$40U8+(B, $B$4MWK>(B,
$B$*Ld$$9g$o$;Ey$O(B doc-jp@jp.FreeBSD.org $B$^$G$*4j$$$7$^$9(B.

$B$3$N4+9p$NCf$G>R2p$5$l$F$$$k(B WWW $B%5%$%H(B http://www.FreeBSD.org/ $B$*$h$S(B
FTP $B%5%$%H(B ftp://ftp.FreeBSD.org/ $B$K$O(B, $BF|K\$N%_%i!<%5%$%H$,B8:_$7$^$9(B.
$B%M%C%H%o!<%/$N:.;($r4KOB$9$k$?$a(B, $B$^$:$O%_%i!<%5%$%H$NMxMQ$r(B
$B9MN8$9$k$h$&$*4j$$$7$^$9(B.

$BF|K\$N%_%i!<%5%$%H$rMxMQ$9$k$K$O(B,
http://www.FreeBSD.org/ $B$r(B http://www.jp.FreeBSD.org/www.freebsd.org/ $B$K(B,
ftp://ftp.FreeBSD.org/ $B$r(B ftp://ftp.jp.FreeBSD.org/ $B$K(B,
$B$=$l$>$lCV$-49$($F$/$@$5$$(B.

$BB>$NCO0h$r4^$`(B, $B%_%i!<%5%$%H$K4X$9$k>\:Y$O(B,

 http://www.FreeBSD.org/handbook/mirror.html ($B1QJ8(B)
 http://www.FreeBSD.org/ja/handbook/mirror.html ($BF|K\8lLu(B)

$B$K$^$H$a$i$l$F$$$^$9(B.

$hrs: announce-jp/FreeBSD-SA/00:78,v 1.4 2000/12/29 14:40:43 hrs Exp $

----Next_Part(Fri_Dec_29_23:41:21_2000_518)----
