From owner-announce-jp@jp.freebsd.org  Sun Jul 16 09:16:52 2000
Received: (from daemon@localhost)
	by castle.jp.freebsd.org (8.9.3+3.2W/8.7.3) id JAA20727;
	Sun, 16 Jul 2000 09:16:52 +0900 (JST)
	(envelope-from owner-announce-jp@jp.FreeBSD.org)
Message-ID: <20000716001651.4233.qmail@smtp.246.ne.jp>
To: announce-jp@jp.FreeBSD.org
Reply-To: doc-jp@jp.freebsd.org
In-Reply-To: <20000711220220.4D26637B8FC@hub.freebsd.org>
References: <20000711220220.4D26637B8FC@hub.freebsd.org>
X-Mailer: Mew version 1.94.2 on Emacs 19.28 / Mule 2.3 (SUETSUMUHANA)
Mime-Version: 1.0
Content-Type: Text/Plain; charset=iso-2022-jp
Content-Transfer-Encoding: 7bit
Date: Sun, 16 Jul 2000 09:16:23 +0900
From: Koga Youichirou <y-koga@jp.freebsd.org>
X-Dispatcher: imput version 20000228(IM140)
X-ML-maintainer: owner-announce-jp@jp.FreeBSD.org
Precedence: list
X-Distribute: distribute version 2.1 (Alpha) patchlevel 24e+000315
X-Sequence: announce-jp 486
Subject: Re: ANNOUNCE: FreeBSD Ports Security Advisory:
 FreeBSD-SA-00:31.canna [REVISED]
Errors-To: owner-announce-jp@jp.freebsd.org
Sender: owner-announce-jp@jp.freebsd.org


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

  Subject: ANNOUNCE: FreeBSD Ports Security Advisory: FreeBSD-SA-00:31.canna [REVISED]
  From: FreeBSD Security Advisories <security-advisories@freebsd.org>
  Date: Tue, 11 Jul 2000 15:02:20 -0700 (PDT)
  Message-Id: <20000711220220.4D26637B8FC@hub.freebsd.org>
  X-Sequence: announce-jp 477

 $B$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. 
 $B%Q%C%AEy$NFbMF$,2~cb$5$l$F$$$J$$$3$H$r3NG'$9$k$?$a$K(B PGP $B$N%A%'%C%/$r(B
 $B9T$J$&$K$O(B, $B86J8$r;2>H$7$F$/$@$5$$(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$,;29M$N(B
 $B$?$a$KDs6!$9$k$b$N$G(B, doc-jp $B$O(B $B$=$NFbMF$K$D$$$F$$$+$J$kJ]>Z$b$$$?$7$^$;$s(B.
 $BF|K\8lLu$K$D$$$F$N$*Ld$$9g$o$;$O(B doc-jp@jp.FreeBSD.org $B$^$G$*4j$$$7$^$9(B.

--($B$3$3$+$i(B)
=============================================================================
FreeBSD-SA-00:31                                           Security Advisory
                                                                FreeBSD, Inc.

$B%H%T%C%/(B:	Canna port contains remote vulnerability [REVISED]

$BJ,N`(B:		ports
$B%b%8%e!<%k(B:	Canna
$B9pCNF|(B:		2000-07-05
$B2~D{F|(B:		2000-07-11
$B1F6AHO0O(B:	Ports Collection
$B=$@5F|(B:		2000-06-29
$B%/%l%8%C%H(B:	Shadow Penguin Security
		<http://shadowpenguin.backsection.net/advisories/index.html>
$B%Y%s%@$N%9%F!<%?%9(B:	$BG'<1:Q(B
FreeBSD $B$K8GM-$+(B:	NO

I.   $BGX7J(B - Background

Canna ($BLuCm(B: $B!X$+$s$J!Y(B) $B$O2>L>4A;zJQ49%5!<%S%9%W%m%0%i%`$G$9(B. 

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

$B!X$+$s$J!Y$N%5!<%P%W%m%0%i%`$K$O(B, $B%j%b!<%H$N%f!<%6$,%f!<%6(B 'bin' $B8"8B(B
$B$GG$0U$N%3!<%I$r%m!<%+%k%7%9%F%`>e$G<B9T$5$;$k967b$,2DG=$H$J$k(B buffer
overflow $B$N%P%0$,B8:_$7$^$9(B. 

Canna $B$N(B port $B$O%G%U%)%k%H$G%$%s%9%H!<%k$5$l$k$b$N$G$O$J$/(B, FreeBSD 
$B%7%9%F%`$N0lIt$r9=@.$9$k$b$N$G$b$"$j$^$;$s(B. $B$=$l$i$O(B, 3500 $B$rD6$($k%5(B
$B!<%I%Q!<%F%#@=$N%"%W%j%1!<%7%g%s$,$9$0$K%$%s%9%H!<%k$G$-$k7A$G<}$a$i$l(B
$B$F$$$k(B FreeBSD Ports Collection $B$N0lIt$G$9(B. FreeBSD 3.5 $B$H$H$b$K=P2Y$5(B
$B$l$?(B Ports Collection $B$O(B, $B%j%j!<%98e$KLdBj$,8+$D$+$C$?$?$a$K$3$NLdBj$r(B
$B4^$s$G$$$^$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$KF~$C$F$$$k$+$i$H$$$C$F(B, FreeBSD $B$N3+H/<T$?$A$,$=$N%"%W%j(B
$B%1!<%7%g%s$,0BA4$G$"$k$HI>2A$7$?$o$1$G$O$"$j$^$;$s(B). $B$?$@$7(B, $B%;%-%e%j(B
$B%F%#LdBj$KBP$7$FBg$-$J1F6A$r;}$D$h$&$J(B ports $B$KBP$9$k%;%-%e%j%F%#4F::(B
$B$rDs6!$9$Y$/(B, $B8=:_EXNOCf$G$9(B. 

III. $B1F6AHO0O(B - Impact

$B%j%b!<%H$N%f!<%6$,(B, $B%f!<%6(B 'bin' $B$N8"8B$GG$0U$N%3!<%I$r%m!<%+%k%7%9%F(B
$B%`>e$G<B9T$9$k$3$H$,2DG=$G$9(B. $B%m!<%+%k%7%9%F%`$N@_Dj$K$h$C$F$O(B, $B%m!<%+(B
$B%k%7%9%F%`$NB>$N<eE@$rMxMQ$9$k$3$H$G(B, $B967b<T$O$5$i$K8"8B$r9b$a$k$3$H$,(B
$B$G$-$k$+$b$7$l$^$;$s(B. 

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

IV.  $BBP1~:v(B - Workaround

$B0J2<$N$$$:$l$+$r9T$J$C$F$/$@$5$$(B. 

1) Canna $B$N(B port/package $B$r%$%s%9%H!<%k$7$F$$$k>l9g(B, $B$=$l$r%"%s%$%s%9(B
$B%H!<%k$9$k(B. 

2) ipfw(8) $B$^$?$O(B ipf(8) $B$r;HMQ$7$F(B, $B!X$+$s$J!Y$N%5!<%P$X$N%j%b!<%H$+(B
$B$i$N%"%/%;%9$r@)8B$9$k$3$H$r8!F$$9$k(B. 

3) $B!X$+$s$J!Y$N%5!<%P%[%9%H$K(B /etc/hosts.canna $B%U%!%$%k$r:n@.$7(B, 
$B!X$+$s$J!Y$N%5!<%P$X$N%"%/%;%9$r5v2D$9$k%[%9%H$rNs5-$9$k(B. $B$?$H$($P(B, 
localhost $B$+$i$N%"%/%;%9$N$_5v2D$9$k>l9g(B, /etc/hosts.canna $B%U%!%$%k$N(B
$BFbMF$r0J2<$N$h$&$K$7$^$9(B. 

        localhost
        unix

localhost $B$H(B IP $B%"%I%l%9$,(B x.y.z.w $B$N(B some-other-host.com $B$+$i$N%"%/%;(B
$B%9$r5v2D$9$k>l9g(B, $B0J2<$N$h$&$K$7$^$9(B. 

        localhost
        unix
        x.y.z.w

V.   $B=$@5=hCV(B - Solution

$B0J2<$N$$$:$l$+$r9T$J$C$F$/$@$5$$(B. 

1) Ports Collection $BA4BN$r99?7$7$F(B, Canna $B$N(B port $B$r:F%3%s%Q%$%k$9$k(B.

2) $B8E$$(B package $B$r%"%s%$%s%9%H!<%k$7(B, $B=$@5F|0J9_$N?7$7$$(B package $B$r%$(B
$B%s%9%H!<%k$9$k(B. $B?7$7$$%Q%C%1!<%8$O(B, $B0J2<$N>l=j$+$iF~<j2DG=$G$9(B. 

ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-3-stable/japanese/ja-Canna-3.2.2.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/japanese/ja-Canna-3.2.2.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-stable/japanese/ja-Canna-3.2.2.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/japanese/ja-Canna-3.2.2.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/japanese/ja-Canna-3.2.2.tgz

$BCm0U(B: $B99?7$5$l$?(B packages $B$,Ds6!$5$l$k$^$G?tF|$+$+$k$+$b$7$l$^$;$s(B. 

3) $B0J2<$N>l=j$+$i(B Canna $B$N?7$7$$(B port $B%9%1%k%H%s$r%@%&%s%m!<%I$7(B,
$B$=$l$r;HMQ$7$F(B Canna $B$N(B port $B$r:F%3%s%Q%$%k$9$k(B.

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

4) portcheckout $B%f!<%F%#%j%F%#$r;HMQ$9$k$H(B, $B>e5-(B (3) $B$r<+F0E*$K(B
$B9T$J$&$3$H$,$G$-$^$9(B.  portcheckout $B$O(B, /usr/ports/devel/portcheckout 
$B$d(B, $B0J2<$N>l=j$+$iF~<j2DG=$G$9(B. 

ftp://ftp.freebsd.org/pub/FreeBSD/ports/packages/devel/portcheckout-1.0.tgz

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

v1.0  2000-07-05  $B=iHG8x3+(B
v1.1  2000-07-11  $B>.EgH%;a(B <kjm@rins.ryukoku.ac.jp> $B$+$iDs<($5$l$?%"%/(B
                  $B%;%9@)8fJ}K!$rDI2C(B, package $B$N(B URL $B=$@5(B, Ports
                  Collection $B$N5,LO$r99?7(B

