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From: Hiroki Sato <hrs@eos.ocn.ne.jp>
In-Reply-To: <200211130407.gAD47922008226@freefall.freebsd.org>
References: <200211130407.gAD47922008226@freefall.freebsd.org>
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Subject: Re: ANNOUNCE: FreeBSD Security Advisory FreeBSD-SA-02:42.resolv
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FreeBSD $B%;%-%e%j%F%#4+9p(B $BF|K\8lHG(B
=============================================================================
FreeBSD-SA-02:42.resolv (2002-11-12)
 * buffer overrun in resolver
=============================================================================

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

  Subject: ANNOUNCE: FreeBSD Security Advisory FreeBSD-SA-02:42.resolv
  From: FreeBSD Security Advisories <security-advisories@FreeBSD.org>
  Date: Tue, 12 Nov 2002 20:07:09 -0800
  Message-Id: <200211130407.gAD47922008226@freefall.freebsd.org>
  X-Sequence: announce-jp 1069

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

 $B86J8$O(B PGP $B=pL>$5$l$F$$$^$9$,!"$3$NF|K\8lLu$O(B PGP $B=pL>$5$l$F$$$^$;$s!#(B
 $B=$@5%Q%C%AEy$NFbMF$,2~$6$s$5$l$F$$$J$$$3$H$r3NG'$9$k$?$a$K(B PGP $B=pL>$N(B
 $B%A%'%C%/$r9T$J$&$K$O!"86J8$r;2>H$7$F$/$@$5$$!#(B

 $BF|K\8lLu$*$h$S%_%i!<%5%$%HMxMQ$N>\:Y$K$D$$$F$O!"J8Kv$N!V(BA. FreeBSD
 $B%;%-%e%j%F%#4+9p(B $BF|K\8lHG$K$D$$$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-02:42.resolv                                     Security Advisory
                                                          The FreeBSD Project

$B%H%T%C%/(B:	$B%j%>%k%P$K$*$1$k%P%C%U%!%*!<%P%i%sLdBj(B
                (buffer overrun in resolver)

$BJ,N`(B:		core
$B%b%8%e!<%k(B:	libc
$B9pCNF|(B:		2002-11-12
$B%/%l%8%C%H(B:	KOZUKA Masahiro <kozuka@masahiro.mbox.media.kyoto-u.ac.jp>,
                Mark Andrews <mark.andrews@isc.org>
$B1F6AHO0O(B:	4.7-RELEASE $B$h$jA0$N$9$Y$F$N%j%j!<%9(B
$B=$@5F|(B:		2002-09-22 12:20:23 2002 UTC (RELENG_4)
                2002-10-23 14:48:21 2002 UTC (RELENG_4_6)
                2002-10-23 14:50:52 2002 UTC (RELENG_4_5)
FreeBSD $B$K8GM-$+(B:	NO


I.   $BGX7J(B - Background

$B%j%>%k%P$O!"%$%s%?!<%M%C%H%I%a%$%s%M!<%`%5!<%P$H$NDL?.$G8r$o$5$l$k(B
$BLd$$9g$o$;%a%C%;!<%8$d1~Ez%a%C%;!<%8$r@8@.!&Aw?.!&2r<a$9$k$?$a$N(B
$B4X?t72$r<BAu$7$?$b$N$G$9!#$3$l$O!"%[%9%HL>!"(BIP $B%"%I%l%9$J$I$N(B
$B>pJs$rLd$$9g$o$;$k$?$a$K;H$o$l$^$9!#(B


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

getaddrinfo(), gethostbyname(), getnetbyname() $B$J$I$r4^$`(B
$B$$$/$D$+$N(B libc $B4X?t$G$O!"(BDNS $B%j%>%k%P4X?t$G$"$k(B res_search$B!"(B
res_query$B!"(Bres_send $B$,;H$o$l$F$$$^$9!#$3$l$i$N%j%>%k%P4X?t$O(B
$B<u?.$7$?Ld$$9g$o$;1~Ez$ND9$5$rLa$jCM$K$H$k$N$G$9$,!"$3$NCM$O(B
$B1~Ez$rJ];}$9$k$?$a$KMQ0U$5$l$?%P%C%U%!$ND9$5$h$j$bBg$-$/$J$k(B
$B>l9g$,$"$j$^$9!#$=$N$h$&$J>l9g!"%j%>%k%P$r8F$S=P$94X?t$OMQ0U$5$l$?(B
$B%P%C%U%!$N6-3&$rD6$($F%G!<%?$rFI$_=q$-$9$k2DG=@-$,$"$j$^$9!#(B


III. $B1F6AHO0O(B - Impact

$B0-0U$r;}$C$?967b<T$O!"MQ0U$5$l$k%P%C%U%!$ND9$5$rD6$($k$h$&$KFC<l$J:Y9)$r(B
$B;\$7$?56$N(B DNS $BLd$$9g$o$;1~Ez$rAw$k$3$H$,$G$-$k2DG=@-$,$"$j$^$9!#(B
$B$3$l$rMxMQ$7$F!"$$$/$D$+$N%"%W%j%1!<%7%g%s$rDd;_$5$;$k$3$H(B ($B%5!<%S%9K832(B) $B$,(B
$B$G$-$k$+$bCN$l$^$;$s!#(B


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

$B2sHrJ}K!$OH=L@$7$F$$$^$;$s!#(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:G?7$N(B 4.7-RELEASE$B!"$b$7$/$O(B 4.7-STABLE $B$K(B
   $B%"%C%W%0%l!<%I$9$k!#$"$k$$$O!"=$@5F|0J9_$N(B RELENG_4_7$B!"(BRELENG_4_6
   (4.6-RELEASE-p4)$B!"(BRELENG_4_5(4.5-RELEASE-p22) $B%;%-%e%j%F%#%V%i%s%A$N(B
   $B$$$:$l$+$K%"%C%W%0%l!<%I$9$k!#(B

2) $B8=:_$N%7%9%F%`$K=$@5%Q%C%A$rE,MQ$9$k!#(B

$B0J2<$N=$@5%Q%C%A$O!"(BFreeBSD 4.5$B!"(BFreeBSD 4.6 $B$N3F%7%9%F%`$K(B
$BE,MQ2DG=$J$3$H$,3NG'$5$l$F$$$k$b$N$G$9!#(B

a) $B0J2<$N>l=j$+$i=$@5%Q%C%A$r%@%&%s%m!<%I$7!"(BPGP $B%f!<%F%#%j%F%#$r;H$C$F(B
   PGP $B=pL>$r3NG'$7$^$9!#(B

# fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-02:42/resolv.patch
# fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-02:42/resolv.patch.asc

b) root $B8"8B$G<!$N%3%^%s%I$r<B9T$7$^$9!#(B

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

 ($BLuCm(B: /path/to/patch $B$NItJ,$O=$@5%Q%C%A$N%Q%9L>$KCV$-49$($F$/$@$5$$(B)

c) <URL:http://www.freebsd.org/doc/handbook/makeworld.html> $B$K=q$+$l$F$$$k(B
   $B<j=g$K$7$?$,$C$F%7%9%F%`$r:F9=C[$7!"%7%9%F%`$r:F5/F0$7$^$9!#(B

$B$^$?!"%Y!<%9%7%9%F%`$K4^$^$l$F$$$J$$!"@EE*$K%j%s%/$5$l$?%P%$%J%j(B
($B$D$^$j(B Ports Collection $B$d%5!<%I%Q!<%F%#@=$N%=!<%9$+$i%3%s%Q%$%k$7$?$b$N(B)
$B$b!"$9$Y$F:F%3%s%Q%$%k$9$kI,MW$,$"$k$3$H$KCm0U$7$F$/$@$5$$!#(B

$B99?7$5$l$?%i%$%V%i%j$r;H$&$h$&!"1F6A$r<u$1$k%"%W%j%1!<%7%g%s$O(B
$B$9$Y$F:F5/F0$9$kI,MW$,$"$j$^$9!#I,?\$G$O$"$j$^$;$s$,!"%7%9%F%`$N:F5/F0$,(B
$B$*$=$i$/:G$b4JC1$JJ}K!$G$7$g$&!#(B


VI.  $B=$@5$N>\:Y(B - Correction details

FreeBSD $B$K$*$$$F:#2s=$@5$5$l$?3F%U%!%$%k$N%j%S%8%g%sHV9f$O!"0J2<$N$H$*$j$G$9!#(B

$B%Q%9L>(B                                                          $B%j%S%8%g%s(B
  $B%V%i%s%A(B
- -------------------------------------------------------------------------
src/lib/libc/net/getaddrinfo.c
  RELENG_4                                                       1.9.2.11
  RELENG_4_6                                                  1.9.2.9.2.1
  RELENG_4_5                                                  1.9.2.8.4.1
src/lib/libc/net/gethostbydns.c
  RELENG_4                                                       1.27.2.3
  RELENG_4_6                                                    1.27.10.2
  RELENG_4_5                                                     1.27.8.2
src/lib/libc/net/getnetbydns.c
  RELENG_4                                                       1.13.2.3
  RELENG_4_6                                                 1.13.2.1.8.2
  RELENG_4_5                                                 1.13.2.1.6.2
src/lib/libc/net/name6.c
  RELENG_4                                                        1.6.2.7
  RELENG_4_6                                                  1.6.2.5.8.2
  RELENG_4_5                                                  1.6.2.5.6.2
src/lib/libc/net/res_mkquery.c
  RELENG_4                                                       1.15.2.2
  RELENG_4_6                                                 1.15.2.1.6.1
  RELENG_4_5                                                 1.15.2.1.4.1
- -------------------------------------------------------------------------


VII. $B;29M;qNA(B - References

<URL:http://www.kb.cert.org/vuls/id/738331>


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$9!#2a5n$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

$B$?$@$7K]Lu<T$*$h$S(B doc-jp $B$O!"$=$NFbMF$K$D$$$F$$$+$J$kJ]>Z$b(B
$B$$$?$7$^$;$s$N$G$4Cm0U$/$@$5$$!#F|K\8lLu$K$D$$$F$N$40U8+!"$4MWK>!"(B
$B$*Ld$$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$$$k(B WWW $B%5%$%H(B http://www.FreeBSD.org/ $B$*$h$S(B
FTP $B%5%$%H(B ftp://ftp.FreeBSD.org/ $B$K$O(B, $BF|K\$N%_%i!<%5%$%H$,B8:_$7$^$9!#(B
$B%M%C%H%o!<%/$N:.;($r4KOB$9$k$?$a!"$^$:$O%_%i!<%5%$%H$NMxMQ$r(B
$B9MN8$9$k$h$&$*4j$$$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$r4^$`%_%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
