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From: Hiroki Sato <hrs@eos.ocn.ne.jp>
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Subject: Re: ANNOUNCE: FreeBSD Security Advisory FreeBSD-SA-02:44.filedesc
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FreeBSD $B%;%-%e%j%F%#4+9p(B $BF|K\8lHG(B
=============================================================================
FreeBSD-SA-02:44.filedesc (2003-01-07)
 * file descriptor leak in fpathconf
=============================================================================

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

  Subject: ANNOUNCE: FreeBSD Security Advisory FreeBSD-SA-02:44.filedesc
  From: FreeBSD Security Advisories <security-advisories@FreeBSD.org>
  Date: Tue, 7 Jan 2003 09:49:08 -0800
  Message-Id: <200301071749.h07Hn85x058198@freefall.freebsd.org>
  X-Sequence: announce-jp 1087

 $B$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-02:44.filedesc                                   Security Advisory
                                                          The FreeBSD Project

$B%H%T%C%/(B:	fpathconf $B$K$*$1$k%U%!%$%k5-=R;R$N%j!<%/LdBj(B
                (file descriptor leak in fpathconf)

$BJ,N`(B:		core
$B%b%8%e!<%k(B:	kernel
$B9pCNF|(B:		2003-01-07
$B%/%l%8%C%H(B:	Joost Pol <joost@pine.nl>
$B1F6AHO0O(B:	FreeBSD 4.3-RELEASE $B$*$h$S!"$=$l0J9_$N%P!<%8%g%s(B
$B=$@5F|(B:		2002-11-11 01:43:31 UTC (RELENG_4)
                2003-01-06 12:37:52 UTC (RELENG_4_7)
                2003-01-06 12:38:21 UTC (RELENG_4_6)
                2003-01-07 15:17:16 UTC (RELENG_4_5)
                2003-01-07 15:17:40 UTC (RELENG_4_4)
                2003-01-06 21:20:54 UTC (RELENG_5_0)
FreeBSD $B$K8GM-$+(B:	YES


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

2003-01-06  v1.0  $B=iHG8x3+(B
2003-01-07  v1.1  FreeBSD 5.x $B$N%P%0$K4X$9$k>pJs$rDI2C!#(B
                  RELENG_4_5, RELENG_4_4 $B%V%i%s%A$N=$@5J}K!$N>\:Y$rDI2C!#(B


I.   $BGX7J(B - Background

fpathconf $B%7%9%F%`%3!<%k$O!"@_Dj2DG=$J%7%9%F%`@)8BCM$d(B
$B%*%W%7%g%sJQ?t$N8=:_$NCM$r!"%U%!%$%k5-=R;R$r;XDj$9$k$3$H$G(B
$B%"%W%j%1!<%7%g%s$+$i;2>H$G$-$k$h$&$K$9$k$?$a$N$b$N$G$9!#(B


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

fpathconf $B$K$O!";XDj$5$l$?%U%!%$%k5-=R;R$N;2>H%+%&%s%H$,IT@5$K(B
$B%$%s%/%j%a%s%H$5$l$k2DG=@-$N$"$k!"%W%m%0%i%`>e$N8m$j$,4^$^$l$F$$$^$9!#(B

$BF1MM$NLdBj$O(B FreeBSD 5.0 $B%G%Y%m%C%Q%W%l%S%e!<HG$K$bB8:_$7$^$9!#(B
$B1F6A$9$k%7%9%F%`%3!<%k$K$O!"(Blseek(2), dup(2) $B$J$I$,4^$^$l$^$9!#(B


III. $B1F6AHO0O(B - Impact

$B%m!<%+%k$N967b<T$O!"0l$D$N%U%!%$%k5-=R;R$KBP$7$F7+$jJV$7(B fpatchconf $B$r(B 
$B8F$S=P$7$F;2>H%+%&%s%H$r7e$"$U$l$5$;$k$3$H$GIi$NCM$K$7!"$=$N8e$K(B
$B$=$N%U%!%$%k5-=R;R$KBP$7$F(B close $B$r8F$S=P$9$H$$$&A`:n$r9T$J$&$3$H$G!"(B
$B%*%Z%l!<%F%#%s%0%7%9%F%`$r%/%i%C%7%e$5$;$k$3$H$,$G$-$k2DG=@-$,$"$j$^$9!#(B

$B$^$?!"$3$l$OL$3d$jEv$F$N%+!<%M%k%a%b%j$r;2>H$9$kM-8z$J%U%!%$%k5-=R;R$r(B
$B$D$/$j$@$92DG=@-$,$"$j$^$9!#$=$N$h$&$J5-=R;R$r:n@.$7$?8e$K%+!<%M%k$,(B
$B?7$7$$%U%!%$%k$r(B open $B$7!"F1$8%a%b%j0LCV$K?7$7$$%U%!%$%k9=B$BN$r(B
$B3d$jEv$F$F$7$^$C$?>l9g!"967b<T$O$=$N%U%!%$%k$K(B
$BBP$7$FFI$_=q$-%"%/%;%9$,$G$-$k2DG=@-$,$"$j$^$9!#(B
$B$3$l$O9b$$8"8B$rIT@5$K3MF@$9$k$?$a$N>pJs8;$K$J$k$+$bCN$l$^$;$s!#(B


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

$B2sHrJ}K!$O$"$j$^$;$s!#(B


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

$B0J2<$N=$@5%Q%C%A$O!"(BFreeBSD 4.4$B!"(BFreeBSD 4.5$B!"(BFreeBSD 4.6$B!"(B
FreeBSD 4.7 $B$N3F%7%9%F%`$KE,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-02:44/filedesc.patch
# fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-02:44/filedesc.patch.asc

b) $B=$@5%Q%C%A$rE,MQ$7$^$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/handbook/kernelconfig.html> $B$K=q$+$l$F$$$k(B
   $B<j=g$K$7$?$,$C$F%+!<%M%k$r:F9=C[$7!"%7%9%F%`$r:F5/F0$7$^$9!#(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/sys/kern/kern_descrip.c
  RELENG_4                                                      1.81.2.15
  RELENG_4_7                                                1.81.2.14.4.1
  RELENG_4_6                                                1.81.2.14.2.1
  RELENG_4_5                                                 1.81.2.9.2.3
  RELENG_4_4                                                 1.81.2.8.2.3
  RELENG_5_0                                                    1.169.2.2
src/sys/kern/vfs_syscalls.c
  RELENG_5_0                                                    1.297.2.2
- -------------------------------------------------------------------------


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

<URL:http://www.pine.nl/press/pine-cert-20030101.txt>


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
