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Date: Sun, 08 Apr 2001 14:33:54 +0900 (JST)
Message-Id: <20010408.143354.112858701.hrs@eos.ocn.ne.jp>
To: doc-jp@jp.freebsd.org
From: Hiroki Sato <hrs@eos.ocn.ne.jp>
In-Reply-To: <87snjpvvac.wl@jazz.wakabaya.net>
References: <20010404.045725.85414621.hrs@eos.ocn.ne.jp>
	<20010404134444O.hino@nwk.cl.nec.co.jp>
	<87snjpvvac.wl@jazz.wakabaya.net>
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Subject: [doc-jp 8134] Re: ANNOUNCE: FreeBSD Security Advisory
 FreeBSD-SA-01:30.ufs-ext2fs
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$B:4F#!wEl5~M}2JBg3X$G$9!#(B

susumu@wakabaya.net ($B<cNS(B $B?J(B) wrote
  in <87snjpvvac.wl@jazz.wakabaya.net>:

susumu> $BB>$K$b(B2,3 $B$5$5$$$JE@$,$"$C$?$N$G(B diff $B:n$C$F$_$^$7$?(B. 
susumu> ($B>e5-$NF|Ln$5$s$4;XE&J,$bF~$C$F$^$9(B)

 $B$I$&$b$G$9!#(B

 $B;XE&ItJ,$rH?1G$5$;$?=$@5HG$rIU$1$F$*$-$^$9!#(B

  # $BFC$KLdBj$,$J$1$l$P6aF|Cf$K(B
  # announce-jp $B$X$^$o$7$^$9!#(B

--
| $B:4F#(B $B9-@8!wEl5~M}2JBg3X(B <hrs@eos.ocn.ne.jp>
|                         <hrs@FreeBSD.org> (FreeBSD Project)

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FreeBSD $B%;%-%e%j%F%#4+9p(B $BF|K\8lHG(B
=============================================================================
FreeBSD-SA-01:30 (2001-03-22)
 * UFS/EXT2FS allows disclosure of deleted data
=============================================================================

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

  Subject: ANNOUNCE: FreeBSD Security Advisory FreeBSD-SA-01:30.ufs-ext2fs
  From: FreeBSD Security Advisories <security-advisories@FreeBSD.org>
  Date: Thu, 22 Mar 2001 13:12:32 -0800 (PST)
  Message-Id: <200103222112.f2MLCWm14901@freefall.freebsd.org>
  X-Sequence: announce-jp 726

 $B$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-01:30                                           Security Advisory
                                                                FreeBSD, Inc.

$B%H%T%C%/(B:	UFS/EXT2FS allows disclosure of deleted data

$BJ,N`(B:		kernel
$B%b%8%e!<%k(B:	ufs/ext2fs
$B9pCNF|(B:		2001-03-22
$B%/%l%8%C%H(B:	Sven Berkvens <sven@berkvens.net>, Marc Olzheim <zlo@zlo.nu>
$B1F6AHO0O(B:       FreeBSD 3.x, 4.x. $B$N$9$Y$F$N%j%j!<%9(B
                $B=$@5F|0JA0$N(B FreeBSD 3.5-STABLE
                $B=$@5F|0JA0$N(B FreeBSD 4.2-STABLE
$B=$@5F|(B:		2000-12-22 (FreeBSD 3.5-STABLE)
                2000-12-22 (FreeBSD 4.2-STABLE)
FreeBSD $B$K8GM-$+(B:	NO


I.   $BGX7J(B - Background

UFS $B$O(B Unix File System $B$NN,$G(B, FreeBSD $B%7%9%F%`$*$h$S(B, $BB>$N(B
$BB?$/$N(B Unix $BM3Mh$N%7%9%F%`$K$*$$$FI8=`$G;HMQ$5$l$F$$$^$9(B.
$B$^$?(B, EXT2FS $B$OB?$/$N(B Linux $B%7%9%F%`$K$*$$$FI8=`$G;HMQ$5$l$F$$$k(B
$B%U%!%$%k%7%9%F%`$G(B, FreeBSD $B$G$bMxMQ2DG=$G$9(B.


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

$B$3$l$i$N%U%!%$%k%7%9%F%`$K$O(B, $B%G!<%?$N0l4S@-$rB;$J$&$h$&$J6%9g>uBV$,(B
$BB8:_$7$^$9(B.  $B$3$l$K$h$j%f!<%6$O(B, $B%U%!%$%k%7%9%F%`Cf$N(B
$B:o=|:Q$_%U%!%$%k$N%G!<%?$,4^$^$l$kNN0h$K%"%/%;%9$9$k$3$H$,2DG=$G$9(B.
$B%U%!%$%k%7%9%F%`$N%3!<%I$G$O(B, $B%f!<%6%W%m%;%9$,?7$7$/MxMQ$9$k(B
$B%V%m%C%/$r$9$Y$F(B 0 $B$G=i4|2=$9$k$h$&$K$J$C$F$$$k$N$G$9$,(B,
$B$"$kFCDj$N>u672<$G$O$3$N(B 0 $B$K$h$k=i4|2=$,9T$J$o$l$:(B, $B0JA0$N%G!<%?$,(B
$B;D$C$?$^$^$N=i4|2=$5$l$F$$$J$$%V%m%C%/$,%f!<%6$KEO$5$l$F$7$^$$$^$9(B.
$B$7$?$,$C$F(B, $B$b$7$=$N%V%m%C%/$,(B, $B%f!<%6$,%"%/%;%98"8B$r;}$?$J$$$h$&$J(B
$B%U%!%$%k$d%G%#%l%/%H%j$N0lIt$H$7$F;H$o$l$F$$$?>l9g(B,
$B$3$NF0:n$O%G!<%?$X$NIT@5$J%"%/%;%9$r5v$9860x$H$J$j$^$9(B.

FreeBSD 3.5.1-RELEASE $B$*$h$S(B 4.2-RELEASE $B$r4^$`(B, $B=$@5F|0JA0$N$9$Y$F$N(B
FreeBSD 3.x $B$*$h$S(B 4.x $B$,(B, $B$3$NLdBj$K$h$k<eE@$N1F6A$r<u$1$^$9(B. 
$B$^$?(B, $B$3$NLdBj$O(B FreeBSD $B%7%9%F%`$K8GM-$N$b$N$G$O$J$/(B, $BB?$/$N(B
$B%U%!%$%k%7%9%F%`$KB8:_$9$k$H9M$($i$l$F$$$^$9(B.

$B$3$NLdBj$O(B, $B%j%j!<%9$,M=Dj$5$l$F$$$k(B FreeBSD 4.3 $B$N8x3+A0$K=$@5$5$l$^$7$?(B.


III. $B1F6AHO0O(B - Impact

$B9b$$8"8B$r;}$?$J$$%f!<%6$O(B, $B:o=|:Q$_$N%U%!%$%k$K4^$^$l$F$$$?%G!<%?$K(B
$B%"%/%;%9$9$k$3$H$,2DG=$G$9(B.


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

$BM-8z$J2sHrJ}K!$O$"$j$^$;$s(B.


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

FreeBSD $B%7%9%F%`$r=$@5F|0J9_$N(B 4.2-STABLE $B$b$7$/$O(B 3.5-STABLE
$B$K%"%C%W%0%l!<%I$7$^$9(B.

$B8=:_MxMQCf$N%7%9%F%`$K=$@5%Q%C%A$rE,MQ$9$k$K$O(B, $B0J2<$N>l=j$+$i(B
$B=$@5%Q%C%A$r%@%&%s%m!<%I$7(B, root $B8"8B$G<!$N%3%^%s%I$r<B9T$7$^$9(B.

# fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-01:30/fs.patch
# fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-01:30/fs.patch.asc

PGP $B%f!<%F%#%j%F%#$r;H$C$F(B PGP $B=pL>$r3NG'$7$^$9(B.

$B$3$N=$@5%Q%C%A$O(B FreeBSD 4.1.1-RELEASE, 4.2-RELEASE $B$*$h$S(B 3.5.1-RELEASE $B$K(B
$BE,MQ2DG=$J$3$H$,3NG'$5$l$F$$$^$9(B.  $B$=$l$h$j8E$$(B, $B8=:_%5%]!<%H$5$l$F$$$J$$(B
$B%j%j!<%9$KBP$7$FE,MQ2DG=$+$I$&$+$O3NG'$5$l$F$$$^$;$s(B.

# cd /usr/src
# patch -p < /path/to/patch

$B=$@5%Q%C%A$rE,MQ$7$?$i(B, $B0J2<$N(B URL $B$K$"$k(B FreeBSD $B%O%s%I%V%C%/$N(B
$B5-=R$K$7$?$,$C$F%+!<%M%k$r:F9=C[$7(B, $B%$%s%9%H!<%k$7$^$9(B.

  http://www.freebsd.org/handbook/kernelconfig.html

$B$=$7$F=$@5$rM-8z$K$9$k$?$a(B, $B%7%9%F%`$r:F5/F0$7$F$/$@$5$$(B.


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/01:30,v 1.3 2001/04/08 05:30:34 hrs Exp $

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