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Subject: Re: ANNOUNCE: FreeBSD Security Advisory:
 FreeBSD-SA-00:33.kerberosIV
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 $B$3$N%a!<%k$O(B, announce-jp $B$KN.$l$?(B

  Subject: ANNOUNCE: FreeBSD Security Advisory: FreeBSD-SA-00:33.kerberosIV
  From: FreeBSD Security Advisories <security-advisories@freebsd.org>
  Date: Wed, 12 Jul 2000 15:36:59 -0700 (PDT)
  Message-Id: <200007122236.PAA18508@freefall.freebsd.org>
  X-Sequence: announce-jp 478

 $B$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-00:33                                           Security Advisory
                                                                FreeBSD, Inc.

$B%H%T%C%/(B:	kerberosIV distribution contains multiple vulnerabilities
		under FreeBSD 3.x

$BJ,N`(B:		core
$B%b%8%e!<%k(B:	kerberosIV
$B9pCNF|(B:		2000-07-12
$B%/%l%8%C%H(B:	Assar Westerlund <assar@FreeBSD.org>
$B1F6AHO0O(B:	$B=$@5F|$h$jA0$N(B FreeBSD 3.x $B%7%9%F%`(B
$B=$@5F|(B:		2000-07-06
FreeBSD $B$K8GM-$+(B:	NO

I.   $BGX7J(B - Background

KTH Kerberos $B$O(B, FreeBSD $B$N(B base $B%7%9%F%`$NDI2C%3%s%]!<%M%s%H$H$7$FG[(B
$BIU$5$l$F$$$k(B Kerberos 4 $B%W%m%H%3%k$N<BAu$G$9(B. 

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

$B0JA0(B, FreeBSD Security Advisory (SA-00:20) $B$G(B, MIT Kerberos 5 $B$N(B port 
$B$K$D$$$F$N%;%-%e%j%F%#>e$NLdBj$r<h$j>e$2$^$7$?(B. $B$=$N;~E@$G$O(B, FreeBSD 
$B$K$*$1$k(B Kerberos $B$N<BAu$K$O$=$NLdBj$,$J$$$H9M$($i$l$F$$$^$7$?(B. $B$7$+$7(B, 
$B:G6a$K$J$C$F(B FreeBSD 3.x $B$K4^$^$l$k8E$$%P!<%8%g%s$N(B KTH Kerberos 4 $B$K(B
$B$O(B, $B<B:]$K$O$=$l$i$NLdBj$N$$$/$D$+$,$"$k$3$H$,H=L@$7$^$7$?(B. FreeBSD
4.0-RELEASE $B0J9_$G$O$3$NLdBj$K$h$k1F6A$O$"$j$^$;$s$,(B, FreeBSD
3.5-RELEASE $B$O$3$NLdBj$r4^$s$G$$$^$9(B. 

$B<eE@$NFbLu$K$D$$$F$O@53N$K$OJ,$+$C$F$$$^$;$s(B. $B$7$+$7(B, $B%m!<%+%k$N%f!<%6(B
$B$,(B Kerberos $B$N%/%i%$%"%s%H$H%5!<%P$NN>J}$N%7%9%F%`>e$G(B root $B8"8B$rC%$&(B
$B$3$H$,$G$-$kLdBj$H(B, $B%j%b!<%H$N%f!<%6$,(B Kerberos $B$N%5!<%P%7%9%F%`>e$G(B 
root $B8"8B$rC%$&$3$H$,$G$-$kLdBj$r4^$s$G$$$k$H9M$($i$l$^$9(B. $B%/%i%$%"%s(B
$B%H$K$D$$$F$O(B, Kerberos $B$N%/%i%$%"%s%H$N5!G=$,<B:]$K@_Dj$5$l$F$$$kI,MW(B
$B$O$J$/(B, $BC1$K%P%$%J%j$,%7%9%F%`>e$KB8:_$9$k$@$1$G<eE@$K$J$j$^$9(B. 

III. $B1F6AHO0O(B - Impact

$B%m!<%+%k$^$?$O%j%b!<%H$N%f!<%6$,(B, Kerberos $B$r%/%i%$%"%s%H$^$?$O%5!<%P(B
$B$H$7$F<B9T$7$F$$$k%7%9%F%`$N(B root $B8"8B$rC%$&$3$H$,$G$-$^$9(B. 

FreeBSD 3.x $B%7%9%F%`$K(B KerberosIV $B%G%#%9%H%j%S%e!<%7%g%s$r%$%s%9%H!<%k(B
$B$7$F$$$J$1$l$P(B, $B$=$N%7%9%F%`$K$3$NLdBj$K$D$$$F$N%;%-%e%j%F%#>e$N<eE@$O(B
$B$"$j$^$;$s(B.

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

$B<eE@$N@-<A>e(B, $B1F6A$r<u$1$k%W%m%0%i%`$*$h$S%M%C%H%o!<%/%5!<%S%9$,J#?tB8(B
$B:_$7$^$9(B. $B0J2<$N%i%$%V%i%j$H%f!<%F%#%j%F%#$O(B, KerberosIV $B%G%#%9%H%j%S(B
$B%e!<%7%g%s$G%$%s%9%H!<%k$5$l$k$b$N$G$9(B. $B$3$l$i$N%U%!%$%k$r:o=|$J$$$7$O(B
$BHs(B Kerberos $BHG$N$b$N$KCV$-49$($F(B, Kerberos $B4XO"$N%3!<%I$O$9$Y$FL58z$K(B
$B$7$J$1$l$P$J$j$^$;$s(B. 

bin/rcp (*)
sbin/dump (*)
sbin/restore (*)
usr/bin/kadmin
usr/bin/kauth
usr/bin/kdestroy
usr/bin/kinit
usr/bin/klist
usr/bin/ksrvtgt
usr/bin/telnet (*)
usr/bin/cvs (*)
usr/bin/passwd (*)
usr/bin/rlogin (*)
usr/bin/rsh (*)
usr/bin/su (*)
usr/lib/libacl.a
usr/lib/libacl_p.a
usr/lib/libacl.so.3
usr/lib/libacl.so
usr/lib/libkadm.a
usr/lib/libkadm_p.a
usr/lib/libkadm.so.3
usr/lib/libkadm.so
usr/lib/libkafs.a
usr/lib/libkafs_p.a
usr/lib/libkafs.so.3
usr/lib/libkafs.so
usr/lib/libkdb.a
usr/lib/libkdb_p.a
usr/lib/libkdb.so.3
usr/lib/libkdb.so
usr/lib/libkrb.a
usr/lib/libkrb_p.a
usr/lib/libkrb.so.3
usr/lib/libkrb.so
usr/lib/libtelnet.a
usr/lib/libtelnet_p.a
usr/libexec/kauthd
usr/libexec/kipd
usr/libexec/kpropd
usr/libexec/telnetd (*)
usr/libexec/rlogind (*)
usr/libexec/rshd (*)
usr/sbin/ext_srvtab
usr/sbin/kadmind
usr/sbin/kdb_destroy
usr/sbin/kdb_edit
usr/sbin/kdb_init
usr/sbin/kdb_util
usr/sbin/kerberos
usr/sbin/kip
usr/sbin/kprop
usr/sbin/ksrvutil
usr/sbin/kstash

"(*)" $B$r$D$1$F$$$k%U%!%$%k$O(B, Kerberos $B%G%#%9%H%j%S%e!<%7%g%s$r%$%s%9(B
$B%H!<%k$7$F$$$J$$>l9g(B FreeBSD $B$N(B base $B%7%9%F%`$K4^$^$l$F$$$k$b$N$G$9$,(B,
Kerberos $B$r%$%s%9%H!<%k$9$k$HCV$-49$($i$l$^$9(B. $B$7$?$,$C$F(B, $B$3$l$i$r;H(B
$BMQ$7B3$1$k>l9g$K$O(B, $BHs(B Kerberos $BHG$N$b$N$HCV$-49$($k$+(B, $B0lEY:o=|$7$F$+(B
$B$i(B FreeBSD $B$r:F%3%s%Q%$%k(B, $B:F%$%s%9%H!<%k$9$kI,MW$,$"$j$^$9(B. 

security/ssh $B$N(B port $B$N$h$&$J(B, Kerberos $BBP1~$N(B ports $B$r%$%s%9%H!<%k$7(B
$B$F$$$k>l9g(B, $B$=$l$i$K$D$$$F$b:o=|$9$k$+(B, Kerberos $B$NBP1~$rL58z$K$7$F:F(B
$B%3%s%Q%$%k$9$Y$-$G$9(B. 

$B;CDjE*$JA<CV$H$7$F$O(B, $B%"%/%;%9@)8f5!G=$r;HMQ$7$F(B, $B%j%b!<%H$N%7%9%F%`$,(B
$B<eE@$N$"$k(B Kerberos $B%5!<%P$N(B Kerberos $B%5!<%S%9$K@\B3$9$k$N$r5qH]$9$k$3(B
$B$H$,$G$-$^$9(B ($B6-3&%U%!%$%"%&%)!<%k$d1F6A$N$"$k%^%7%s>e$N%m!<%+%k$N%U%!(B
$B%$%"%&%)!<%k$N$I$A$i$+$G9T$J$$$^$9(B. $B>\:Y$O(B ipfw(8) $B$N%^%K%e%"%k;2>H(B). 

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

$B<eE@$N$"$k(B FreeBSD 3.x $B%7%9%F%`$r(B, $B=$@5F|0J9_$N$b$N$K%"%C%W%0%l!<%I$7(B
$B$^$9(B ($B=$@5F|0J9_$N(B FreeBSD 3.5-STABLE $B$+(B, 4.0-RELEASE, 4.0-STABLE). 
FreeBSD $B%7%9%F%`$r%=!<%9$+$i%"%C%W%0%l!<%I$9$kJ}K!$K$D$$$F$O(B, 
http://www.freebsd.org/handbook/makeworld.html $B$K(B, $B>\$7$/:\$C$F$$$^$9(B.

$B%"%C%W%0%l!<%I$K:]$7$F$O(B, $B%7%9%F%`>e$K8E$$%P%$%J%j$,3N<B$K;D$i$J$$$h$&(B
$B$K$7$F(B, Kerberos $B$N%3!<%I$r%$%s%9%H!<%k$9$k$h$&$K$7$F$/$@$5$$(B. 

Kerberos $B$KBP1~$7$F$$$k(B ports $B$N:F%3%s%Q%$%k$K$D$$$F$O(B IV $B>O$r;2>H$7$F(B
$B$/$@$5$$(B. 
