From owner-announce-jp@jp.freebsd.org  Mon May 22 09:11:03 2000
Received: (from daemon@localhost)
	by castle.jp.freebsd.org (8.9.3+3.2W/8.7.3) id JAA17318;
	Mon, 22 May 2000 09:11:03 +0900 (JST)
	(envelope-from owner-announce-jp@jp.FreeBSD.org)
Message-Id: <200005211515.AAA27971@mail.geocities.co.jp>
To: announce-jp@jp.freebsd.org
In-Reply-To: <20000424224635.EEF4B37BBB4@hub.freebsd.org>
References: <20000424224635.EEF4B37BBB4@hub.freebsd.org>
X-Mailer: Mew version 1.94 on Emacs 19.34 / Mule 2.3 (SUETSUMUHANA)
Mime-Version: 1.0
Content-Type: Text/Plain; charset=iso-2022-jp
Content-Transfer-Encoding: 7bit
Date: Sun, 21 May 2000 23:32:57 +0900
From: Hiroki Sato <hrs@geocities.co.jp>
X-Dispatcher: imput version 990905(IM130)
Lines: 101
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 438
Subject: Re: ANNOUNCE: FreeBSD Security Advisory: FreeBSD-SA-00:15.imap-uw
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 Security Advisory: FreeBSD-SA-00:15.imap-uw
  From: FreeBSD Security Officer <security-officer@freebsd.org>
  Date: Mon, 24 Apr 2000 15:46:35 -0700 (PDT)
  Message-Id: <20000424224635.EEF4B37BBB4@hub.freebsd.org>
  X-Sequence: announce-jp 423

 $B$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-00:15                                           Security Advisory
                                                                FreeBSD, Inc.

$B%H%T%C%/(B:	imap-uw allows local users to deny service to any mailbox

$BJ,N`(B:           ports
$B%b%8%e!<%k(B:     imap-uw
$B9pCNF|(B:         2000-04-24
$B%/%l%8%C%H(B:     Alex Mottram <alex@NET-CONNECT.NET> (BugTraq ML $B$h$j(B)
$B1F6AHO0O(B:       Ports collection
$B=$@5F|(B:         $B2<5-;2>H(B
$B%Y%s%@$NBP1~(B:   $B%Y%s%@$KLdBj$r9pCN:Q$_(B
FreeBSD $B$K8GM-$+(B:   NO

I.   $BGX7J(B - Background

imap-uw $B$O(B, $B%o%7%s%H%sBg3X$G3+H/$5$l$?(B, $B?M5$$N$"$k(B IMAP4/POP2/POP3
$B%a!<%k%5!<%P$G$9(B.

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

imap-uw $B$N(B port $B$O(B, $B%a!<%k%5!<%P$G6&DL$K;H$o$l$k$5$^$6$^$J5!G=$r(B
$BMQ0U$7$?(B "libc-client" $B$H$$$&%i%$%V%i%j$rDs6!$7$F$$$^$9(B.
$B$=$l$K4^$^$l$k(B mailbox $B%U%!%$%k$N%m%C%/=hM}$r9T$J$&%"%k%4%j%:%`$K$O(B,
$B8"8B$N$J$$%m!<%+%k%f!<%6$,(B, $BG$0U$N%m!<%+%k(B mailbox $B$r%m%C%/$G$-$k$H$$$&(B
$B%;%-%e%j%F%#>e$N<eE@$,B8:_$7$^$9(B.

$B$3$l$O(B POP2/POP3 $B%5!<%P$N>l9g(B, $B=jM-<T$,(B mailbox $B$K$^$C$?$/(B
$B%"%/%;%9$G$-$J$/$J$k$3$H$r0UL#$7$^$9(B.  IMAP4 $B%5!<%P$N>l9g(B,
$B%U%)%k%@$NFI$_=P$7%*!<%W%s$O$G$-$^$9$,(B, $B=q$-9~$_$,(B
$B$G$-$J$/$J$j$^$9(B($B$D$^$j(B, $B2DG=$J%"%/%;%9$OFI$_=P$7$N$_$K$J$j$^$9(B).

$B$3$N%;%-%e%j%F%#>e$N<eE@$O(B, FreeBSD $B%;%-%e%j%F%#4+9p(B 00:14 $B$G(B
$B=R$Y$i$l$F$$$k$b$N$H$O0[$J$k$b$N$G(B, $BMxMQ<T$K%7%'%k%l%Y%k$N%"%/%;%9$r(B
$BDs6!$7$F$$$k(B, $B$9$Y$F$N(B imap-uw $B%5!<%P$K1F6A$,$"$k$H$$$&$3$H$KCm0U$7$F$/$@$5$$(B.
$B$^$?(B, $B%;%-%e%j%F%#4+9p(B 00:14 $B$N1F6A$N$?$a(B, IMAP $B7PM3$G%j%b!<%H$+$i(B
$B%a!<%k$K%"%/%;%9$G$-$kMxMQ<T$O(B, $B$?$H$(%7%'%k%m%0%$%s%"%/%;%9$,L@<(E*$K(B
$B5v2D$5$l$F$$$J$$%5!<%P$G$"$C$F$b(B, $B%7%'%k%l%Y%k$N%"%/%;%9$r3MF@$G$-$k$3$H(B
$B$KCm0U$7$J$1$l$P$J$j$^$;$s(B.

imap-uw $B$N(B port $B$O(B, $B%G%U%)%k%H$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$O(B, 3200 $B$r(B
$BD6$($k%5!<%I%Q!<%F%#@=$N%"%W%j%1!<%7%g%s$,$9$0$K%$%s%9%H!<%k$G$-$k7A$G(B
$B<}$a$i$l$F$$$k(B FreeBSD Ports Collection $B$N0lIt$G$9(B.  $B$3$N%;%-%e%j%F%#>e$N(B
$B<eE@$,H/8+$5$l$?$N$,%j%j!<%9;~E@$h$j8e$G$"$C$?$3$H$+$i(B, FreeBSD 4.0 $B$K(B
$B4^$^$l$k(B Ports Collection $B$K$b(B, $B$3$NLdBj$,B8:_$7$^$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%#LdBj$K(B
$BBP$7$F(B, $BFC$K2?$+$r<gD%$9$k$3$H$O$"$j$^$;$s(B($BLuCm(B: Ports Collection $B$KF~$C$F(B
$B$$$k$+$i$H$$$C$F(B, FreeBSD $B$N3+H/<T$?$A$,$=$N%"%W%j%1!<%7%g%s$,0BA4$G$"$k$H(B
$BI>2A$7$?$o$1$G$O$"$j$^$;$s(B). $B$?$@$7(B, $B%;%-%e%j%F%#LdBj$KBP$7$FBg$-$J1F6A$r(B
$B;}$D$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

$B%a!<%k%5!<%P$KBP$9$k%7%'%k%"%/%;%9$r5v2D$5$l$?%f!<%6(B, $B$b$7$/$O(B
$B%7%'%k%"%/%;%9$r3MF@$G$-$k%f!<%6(B($B%;%-%e%j%F%#4+9p(B 00:14 $B$r;2>H(B)$B$O(B,
$BG$0U$N(B mailbox $B$KBP$7$F(B, POP2/POP3 $B7PM3$G$N%"%/%;%9$rK832$7$?$j(B,
IMAP $B7PM3$G$N%"%/%;%9$rFI$_$@$7@lMQ$K6/@)$9$k$3$H$,2DG=$G$9(B.

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

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

1) imap-uw $B$N(B port/package $B$,%$%s%9%H!<%k$5$l$F$$$k>l9g$K$O(B,
   $B$=$l$r:o=|$7$F$/$@$5$$(B.

2) IMAP $B$N5!G=$rI,MW$H$7$F$$$J$$$J$i(B, $B2?$+B>$N(B POP2/POP3 $B%5!<%P$r(B
   $B;HMQ$9$k$3$H$r9M$($F$/$@$5$$(B.  $B$^$?(B, FreeBSD $B%;%-%e%j%F%#4+9p(B 00:14 $B$K(B
   $B$"$k(B, $BBeBX(B IMAP $B%5!<%P$K4X$9$kCm0U$b;2>H$7$F$/$@$5$$(B.

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

$B8=;~E@$G=$@5%Q%C%A$OB8:_$7$^$;$s(B.  $B%m!<%+%k$N%5!<%S%9ITG=967b$N860x$H(B
$B$J$i$J$$(B, $B0BA4$J%U%!%$%k%m%C%/5!9=$rDs6!$9$k$h$&$K(B mailbox $B$N%m%C%/=hM}K!$r(B
$B:F@_7W$9$k$3$H$O(B, imap-uw $B$N3+H/<T$?$A$K$H$C$FBgJQ$J:n6H$J$N$G$9(B.

$B$3$N%;%-%e%j%F%#4+9p$O(B, imap-uw $B$KB8:_$9$k(B
$B$3$N4{CN$N<eE@$KBP$7$FBP:v$,9T$J$o$l$?8e$K(B, $B99?7$5$l$kM=Dj$G$9(B.
