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FreeBSD $B%;%-%e%j%F%#4+9p(B $BF|K\8lHG(B
=============================================================================
FreeBSD-SA-03:04.sendmail (2003-03-03)
 * sendmail header parsing buffer overflow
=============================================================================

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

  Subject: ANNOUNCE: FreeBSD Security Advisory FreeBSD-SA-03:04.sendmail
  From: FreeBSD Security Advisories <security-advisories@freebsd.org>
  Date: Mon, 3 Mar 2003 09:11:37 -0800 (PST)
  Message-Id: <200303031711.h23HBbVf059406@freefall.freebsd.org>
  X-Sequence: announce-jp 1108

 $B$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


                                 [$BK]Lu<T(B: $BARIJ(B $B1Q9T(B <rushani@jp.FreeBSD.org>]
--($B$3$3$+$i(B)
=============================================================================
FreeBSD-SA-03:04.sendmail                                   Security Advisory
                                                          The FreeBSD Project

$B%H%T%C%/(B:	sendmail $B$N%X%C%@2r@O;~$N%P%C%U%!%*!<%P%U%m!<(B
                (sendmail header parsing buffer overflow)

$BJ,N`(B:		contrib
$B%b%8%e!<%k(B:	contrib_sendmail
$B9pCNF|(B:		2003-03-03
$B%/%l%8%C%H(B:	Mark Dowd (ISS)
$B1F6AHO0O(B:	4.8-RELEASE$B!"(B5.0-RELEASE-p4 $B$h$jA0$N!"$9$Y$F$N(B
                $B%P!<%8%g%s$N(B FreeBSD
                $B=$@5F|$h$jA0$N(B FreeBSD 4-STABLE
$B=$@5F|(B:		2003-03-03
FreeBSD $B$K8GM-$+(B:	NO

I.   $BGX7J(B - Background

FreeBSD $B$G$O!"%G%U%)%k%H$N(B Mail Transfer Agent (MTA) $B$H$7$F!"(B
$BHFMQ$N%$%s%?!<%M%C%H%o!<%/%a!<%kG[Aw5!9=$G$"$k(B
sendmail(8) $B$r:NMQ$7$F$$$^$9!#(B

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

Internet Security Systems, Inc. (ISS) $B$O!"%P!<%8%g%s(B 5.79 $B0J9_$N(B
$B$9$Y$F$N(B sendmail $B$K!"%a!<%k$N%X%C%@2r@O;~$K%P%C%U%!%*!<%P%U%m!<$,(B
$B5/$3$k2DG=@-$N$"$kLdBj$r3NG'$7$F$$$^$9!#(B

$B$5$i$K!"(BSendmail, Inc. $B$O!"(Bsendmail $BFbB"$N(B ident $B%W%m%H%3%k(B (RFC 1413)
$B$r%5%]!<%H$9$k%3!<%ICf$N%P%C%U%!$N<h07$$$K7g4Y$r3NG'$7!"=$@5$r9T$J$C$F$$$^$9!#(B

III. $B1F6AHO0O(B - Impact

$B%j%b!<%H$N967b<T$O!"(Bsendmail $B$r5/F0$7$?%f!<%6(B ($BDL>o$O(B root) $B$N8"8B$G!"(B
sendmail $B$KG$0U$N%3!<%I$r<B9T$5$;$k$h$&$JFC<l$J:Y9)$r;\$7$?%a%C%;!<%8$r(B
$B:n@.$9$k$3$H$,$G$-$^$9!#$3$N0-0U$"$k%a%C%;!<%8$O!":G=i$K%a!<%k$r(B
$B<u$1<h$k(B sendmail MTA$B!"%j%l!<$r9T$J$&(B sendmail MTA$B!"(Bsendmail $B$NG[Aw(B
$B%W%m%;%9$N$$$:$l$K$b07$o$l$k2DG=@-$,$"$k$?$a!"$=$N7k2L!"$<$$<e@-$,(B
$B0z$-5/$3$5$l$k$3$H$K$J$j$^$9!#$3$N<eE@$r0-MQ$9$k$3$H$O$+$J$j:$Fq$G$9$,!"(B
$B<B8=2DG=$G$"$k$H9M$($i$l$F$$$^$9!#(B

$B$J$*!"(Bident $B%k!<%A%s$K4^$^$l$k<eE@$O0-MQ$G$-$k$b$N$H$O9M$($i$l$F$$$^$;$s!#(B

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

sendmail $B$rL58z$K$9$k0J30$K2sHrJ}K!$O$"$j$^$;$s!#(B

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

$B<!$N$$$:$l$+0l$D$K=>$C$F$/$@$5$$!#(B

1) $B<eE@$r;}$C$?(B FreeBSD $B%7%9%F%`$r:G?7$N(B 4.7-STABLE$B!"$b$7$/$O=$@5F|0J9_$N(B
   RELENG_5_0 (5.0-RELEASE-p4)$B!"(BRELENG_4_7 (4.7-RELEASE-p7)$B!"(B
   RELENG_4_6 (4.6.2-RELEASE-p10) $B%;%-%e%j%F%#%V%i%s%A$N$$$:$l$+$K(B
   $B%"%C%W%0%l!<%I$9$k!#(B

[NOTE: $B$3$N%;%-%e%j%F%#4+9p<9I.;~E@$G$O!"(BFreeBSD 4-STABLE $B%V%i%s%A$O(B
 `4.8-RC1' $B$H$$$&%i%Y%k$,IU$1$i$l$F$$$^$9!#(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 5.0$B!"(BFreeBSD 4.7$B!"(BFreeBSD 4.6.2 $B$N(B
$B3F%7%9%F%`$KE,MQ2DG=$J$3$H$,3NG'$5$l$F$$$^$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

ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-03:04/sendmail.patch
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-03:04/sendmail.patch.asc

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

# cd /usr/src
# patch < /path/to/patch
# cd /usr/src/lib/libsm
# make obj && make depend && make
# cd /usr/src/lib/libsmutil
# make obj && make depend && make
# cd /usr/src/usr.sbin/sendmail
# make obj && make depend && make && make install

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

3) i386 $B%7%9%F%`$K8B$j!"=$@5%Q%C%A$rE,MQ$7$F9=C[$7$?(B sendmail $B%P%$%J%j$r(B
   $BMxMQ$9$k$3$H$,$G$-$^$9!#1?MQ$7$F$$$k(B FreeBSD $B$N%P!<%8%g%s$H(B
   STARTTLS $B%5%]!<%H$NM-L5$K$h$j!"E,@Z$J%P%$%J%j$rA*Br$7$F$/$@$5$$!#(B
   $B$J$*!"(BSTARTTLS $B%5%]!<%H$rM-8z$K$7$?%P%$%J%j$rMxMQ$9$k$K$O!"(B
   crypto $BG[I[J*$,%$%s%9%H!<%k$5$l$F$$$J$1$l$P$J$j$^$;$s!#(B

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

ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-03:04/sendmail-4.6-i386-crypto.bin.gz
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-03:04/sendmail-4.6-i386-crypto.bin.gz.asc

ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-03:04/sendmail-4.6-i386-nocrypto.bin.gz
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-03:04/sendmail-4.6-i386-nocrypto.bin.gz.asc

ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-03:04/sendmail-4.7-i386-crypto.bin.gz
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-03:04/sendmail-4.7-i386-crypto.bin.gz.asc

ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-03:04/sendmail-4.7-i386-nocrypto.bin.gz
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-03:04/sendmail-4.7-i386-nocrypto.bin.gz.asc

ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-03:04/sendmail-5.0-i386-crypto.bin.gz
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-03:04/sendmail-5.0-i386-crypto.bin.gz.asc

ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-03:04/sendmail-5.0-i386-nocrypto.bin.gz
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-03:04/sendmail-5.0-i386-nocrypto.bin.gz.asc

b) $B%P%$%J%j$r%$%s%9%H!<%k$7$^$9!#0J2<$N%3%^%s%I$r(B root $B$G<B9T$7$F$/$@$5$$!#(B
   $B0J2<$O!"(BFreeBSD 4.7 $B%7%9%F%`$G(B crypto $B%P%$%J%j$rMxMQ$9$kNc$G$9!#(B
   $B$J$*!"(BBINARYGZ $B$K$O!"%9%F%C%W(B (a) $B$G%@%&%s%m!<%I$7$?%U%!%$%k$NL>A0$r(B
   $BBeF~$7$F$/$@$5$$!#(B

# BINARYGZ=/path/to/sendmail-4.7-i386-crypto.bin.gz
# gunzip ${BINARYGZ}
# install -s -o root -g smmsp -m 2555 ${BINARYGZ%.gz} /usr/libexec/sendmail/sendmail

c) sendmail $B$r:F5/F0$7$^$9!#(Broot $B$G0J2<$N%3%^%s%I$r<B9T$7$F$/$@$5$$!#(B

# /bin/sh /etc/rc.sendmail restart

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/contrib/src/sendmail.h
src/contrib/sendmail/src/daemon.c
src/contrib/sendmail/src/headers.c
src/contrib/sendmail/src/main.c
src/contrib/sendmail/src/parseaddr.c
- -------------------------------------------------------------------------

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

<URL: http://www.kb.cert.org/vuls/id/398025 >
<URL: http://www.iss.net/issEn/delivery/xforce/alertdetail.jsp?oid=21950 >
<URL: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-1337 >

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
