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Subject: Re: ANNOUNCE: FreeBSD Security Advisory: FreeBSD-SA-00:61.tcpdump [REISSUED]
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 $B$3$N%a!<%k$O(B, announce-jp $B$KN.$l$?(B

  Subject: ANNOUNCE: FreeBSD Security Advisory: FreeBSD-SA-00:61.tcpdump [REISSUED]
  From: FreeBSD Security Advisories <security-advisories@freebsd.org>
  Date: Mon,  6 Nov 2000 11:58:27 -0800 (PST)
  Message-Id: <20001106195827.5C6BA37B4CF@hub.freebsd.org>
  X-Sequence: announce-jp 590

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

 $B$3$N4+9p$NCf$G>R2p$5$l$F$$$k(B WWW $B%5%$%H(B http://www.FreeBSD.org/ $B$*$h$S(B
 FTP $B%5%$%H(B ftp://ftp.FreeBSD.org/ $B$K$O(B, $BF|K\$N%_%i!<%5%$%H$,B8:_$7$^$9(B.
 $B%_%i!<%5%$%H$rMxMQ$9$k$K$O(B,
 http://www.FreeBSD.org/ $B$r(B http://www.jp.FreeBSD.org/www.freebsd.org/ $B$K(B,
 ftp://ftp.FreeBSD.org/ $B$r(B ftp://ftp.jp.FreeBSD.org/ $B$K(B,
 $B$=$l$>$lCV$-49$($F$/$@$5$$(B.

 $B%M%C%H%o!<%/$N:.;($r4KOB$9$k$?$a(B, $B$^$:$O%_%i!<%5%$%H$NMxMQ$r(B
 $B9MN8$9$k$h$&$*4j$$$7$^$9(B.  $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(B, $B$^$?(B, $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.

 $B86J8$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-00:61                                           Security Advisory
                                                                FreeBSD, Inc.

$B%H%T%C%/(B:	tcpdump contains remote vulnerabilities [REISSUED]

$BJ,N`(B:		core
$B%b%8%e!<%k(B:	tcpdump
$B9pCNF|(B:		2000-10-31
$B2~D{F|(B:         2000-11-06
$B%/%l%8%C%H(B:	$BFbIt%;%-%e%j%F%#4F::Cf$KH/8+(B
$B1F6AHO0O(B:	FreeBSD 4.2 $B$h$jA0$N$9$Y$F$N(B FreeBSD 3.x, 4.x $B%j%j!<%9(B
                $B=$@5F|0JA0$N(B FreeBSD 3.5.1-STABLE $B$*$h$S(B 4.1.1-STABLE
$B=$@5F|(B:		2000-10-04 (FreeBSD 4.1.1-STABLE)
		2000-10-05 (FreeBSD 3.5.1-STABLE)
$B%Y%s%@$NBP1~(B:	$B=$@5%Q%C%A$,8x3+:Q$_(B
FreeBSD $B$K8GM-$+(B:	NO

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

v1.0  2000-10-31  $B=iHG8x3+(B
v1.1  2000-11-06  $B=$@5%Q%C%A$ND{@5(B


I.   $BGX7J(B - Background

tcpdump $B$O%M%C%H%o!<%/$N2TF/>uBV$r%b%K%?%j%s%0$9$k%D!<%k$G$9(B.

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

$BFbIt%;%-%e%j%F%#4F::$N:](B, FreeBSD $B$K4^$^$l$k(B tcpdump $B$NCf$K(B
$B%P%C%U%!%*!<%P%U%m!<$N4m81@-$r;}$D%P%C%U%!$,H/8+$5$l$^$7$?(B.
$B$=$N$&$A$N$$$/$D$+$O(B, $B%j%b!<%H$N967b<T$,%m!<%+%k$N(B tcpdump $B%W%m%;%9$r(B
$B%/%i%C%7%e$5$;$k$N$KMxMQ2DG=$J$b$N$G$9(B.  $B$^$?(B, FreeBSD 4.0-RELEASE,
4.1-RELEASE $B$*$h$S(B 4.1.1-RELEASE $B$K4^$^$l$F$$$k?7$7$$%P!<%8%g%s$N(B
tcpdump (tcpdump 3.5) $B$K$O(B, AFS ACL $B%Q%1%C%H$N%G%3!<%IItJ,$K(B
$B%j%b!<%H$N967b<T$,%m!<%+%k%7%9%F%`$GG$0U$N%3!<%I$r<B9T(B (tcpdump $B$O(B
root $B8"8B$rMW5a$9$k$?$a(B, $BDL>o$O(B root $B8"8B$G(B) $B$G$-$k$h$&$J(B,
$B$h$j?<9o$J<eE@$,B8:_$7$^$9(B.

$B0l$DL\$NLdBjE@$O(B, tcpdump $B$r;H$C$F?/F~8!CN%7%9%F%`(B (intrusion detection
system) $B$r9=C[$7$F$$$k>l9g$KLdBj$H$J$j$^$9(B.  $B$?$H$($P(B
$B%M%C%H%o!<%/$N2x$7$$5sF0$r%b%K%?%j%s%0$7$F$$$k>l9g(B, $B967b<T$,2TF/Cf$N(B
tcpdump $B%W%m%;%9$r%/%i%C%7%e$5$;$k$H(B, $B$=$N8e$N%M%C%H%o!<%/>uBV$,(B
$B4Q;!$G$-$J$/$J$C$F$7$^$$$^$9(B.

FreeBSD 3.5.1-RELEASE, 4.0-RELEASE, 4.1-RELEASE $B$*$h$S(B 4.1.1-RELEASE $B$r4^$`(B,
$B=$@5F|0JA0$N$9$Y$F$N(B FreeBSD $B%j%j!<%9$K$O!V%j%b!<%H$+$i$N%/%i%C%7%e967b!W$K(B
$BBP$9$k<eE@$,(B, FreeBSD 4.0-RELEASE, 4.1-RELEASE $B$*$h$S(B 4.1.1-RELEASE $B$K$O(B
$B$5$i$K!V%j%b!<%H$+$iG$0U$N%3!<%I$,<B9T$G$-$k!W<eE@$,B8:_$7$^$9(B.
$BLdBjE@$ON>J}$H$b(B, 4.2-RELEASE $B$N%j%j!<%9A0$N(B 4.1.1-STABLE $B$G=$@5$5$l$F$$$^$9(B.

III. $B1F6AHO0O(B - Impact

$B%j%b!<%H%f!<%6$,%m!<%+%k$N(B tcpdump $B%W%m%;%9$r%/%i%C%7%e$5$;$k$3$H$,$G$-$^$9(B.
$B$^$?(B, ($B=$@5F|0JA0$N(B FreeBSD 4.0-RELEASE, 4.1-RELEASE, 4.1.1-RELEASE $B$*$h$S(B
4.1.1-STABLE $B$G$O(B) $B%j%b!<%H%f!<%6$,(B tcpdump $B$r<B9T$7$F$$$k%f!<%6(B ($BDL>o$O(B
root) $B$N8"8B$GG$0U$N%3!<%I$r<B9T$G$-$k2DG=@-$,$"$j$^$9(B.

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

$B<eE@$r;}$C$?%P!<%8%g%s$N(B tcpdump $B$r(B, $B?.Mj$G$-$J$$Aw?.85$+$i$N(B
$B%Q%1%C%H$,4^$^$l$k2DG=@-$N$"$k%M%C%H%o!<%/4D6-$G;HMQ$7$J$$$G$/$@$5$$(B.

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

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

1) $B<eE@$r;}$C$?(B FreeBSD $B%7%9%F%`$r(B, $B=$@5F|0J9_$N(B
   4.1.1-STABLE $B$b$7$/$O(B 3.5.1-STABLE $B$K%"%C%W%0%l!<%I$7$^$9(B.

2a) $B=$@5F|0JA0$N(B FreeBSD 3.x $B%7%9%F%`$N>l9g(B

$B=$@5%Q%C%A$H(B PGP $B=pL>$r0J2<$N>l=j$+$i%@%&%s%m!<%I$7(B,
PGP $B%f!<%F%#%j%F%#$r;H$C$F=pL>$r3NG'$7$F$/$@$5$$(B.

ftp://ftp.freebsd.org/pub/FreeBSD/CERT/patches/SA-00:61/tcpdump-3.x.patch
ftp://ftp.freebsd.org/pub/FreeBSD/CERT/patches/SA-00:61/tcpdump-3.x.patch.asc

# cd /usr/src/contrib/tcpdump
# patch -p < /path/to/patch
# cd /usr/src/usr.sbin/tcpdump
# make depend && make all install

2b) $B=$@5F|0JA0$N(B FreeBSD 4.x $B%7%9%F%`$N>l9g(B

$BCm0U(B: $B=iHG$N4+9p$GG[I[$5$l$?=$@5%Q%C%A$OIT40A4$G(B, tcpdump $B$KBP$9$k(B
      $B$9$Y$F$N%;%-%e%j%F%#>e$N=$@5$r4^$s$@$b$N$G$O$"$j$^$;$s$G$7$?(B.
      $BFC$K(B, $B%j%b!<%H$+$i%3!<%I$,<B9T$G$-$k<eE@$KBP$7$F$O$^$C$?$/(B
      $B8z2L$,$"$j$^$;$s(B.

$B=$@5%Q%C%A$H(B PGP $B=pL>$r0J2<$N>l=j$+$i%@%&%s%m!<%I$7(B,
PGP $B%f!<%F%#%j%F%#$r;H$C$F=pL>$r3NG'$7$F$/$@$5$$(B.

ftp://ftp.freebsd.org/pub/FreeBSD/CERT/patches/SA-00:61/tcpdump-4.x.patch.v1.1
ftp://ftp.freebsd.org/pub/FreeBSD/CERT/patches/SA-00:61/tcpdump-4.x.patch.v1.1.asc

# cd /usr/src/contrib/tcpdump
# patch -p < /path/to/patch
# cd /usr/src/usr.sbin/tcpdump
# make depend && make all install

