From owner-announce-jp@jp.freebsd.org  Tue Feb 20 18:57:45 2001
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Date: Mon, 19 Feb 2001 03:24:02 +0900 (JST)
Message-Id: <20010219.032402.55512776.hrs@eos.ocn.ne.jp>
To: announce-jp@jp.FreeBSD.org
From: Hiroki Sato <hrs@eos.ocn.ne.jp>
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Subject: Re: ANNOUNCE: FreeBSD Security Advisory: FreeBSD-SA-01:11.inetd [REVISED]
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FreeBSD $B%;%-%e%j%F%#4+9p(B $BF|K\8lHG(B
=============================================================================
FreeBSD-SA-01:11 (2001-02-07)
 * inetd ident server allows remote users to partially
   read arbitrary wheel-accessible files [REVISED]
=============================================================================

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

  Subject: ANNOUNCE: FreeBSD Security Advisory: FreeBSD-SA-01:11.inetd [REVISED]
  From: FreeBSD Security Advisories <security-advisories@FreeBSD.org>
  Date: Wed, 7 Feb 2001 11:34:55 -0800 (PST)
  Message-Id: <200102071934.f17JYtL04378@freefall.freebsd.org>
  X-Sequence: announce-jp 686

 $B$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. 
 $B=$@5%Q%C%AEy$NFbMF$,2~cb$5$l$F$$$J$$$3$H$r3NG'$9$k$?$a$K(B PGP $B=pL>$N(B
 $B%A%'%C%/$r9T$J$&$K$O(B, $B86J8$r;2>H$7$F$/$@$5$$(B. 

 $BF|K\8lLu$*$h$S(B, $B%_%i!<%5%$%HMxMQ$N>\:Y$K$D$$$F$O(B, $BJ8Kv$N!V(BA. FreeBSD
 $B%;%-%e%j%F%#4+9p(B $BF|K\8lHG$K$D$$$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-01:11                                           Security Advisory
                                                                FreeBSD, Inc.

$B%H%T%C%/(B:	inetd ident server allows remote users to partially
                read arbitrary wheel-accessible files [REVISED]

$BJ,N`(B:		core
$B%b%8%e!<%k(B:	inetd
$B9pCNF|(B:		2001-01-29
$B2~D{F|(B:		2001-02-07
$B%/%l%8%C%H(B:	dynamo <dynamo@ime.net>
$B1F6AHO0O(B:	FreeBSD 3.x ($BA4%j%j!<%9(B)
                FreeBSD 4.x ($BA4%j%j!<%9(B)
$B=$@5F|(B:		2000-11-25 (FreeBSD 4.2-STABLE)
                2001-01-26 (FreeBSD 3.5-STABLE)
FreeBSD $B$K8GM-$+(B:	Yes


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

v1.0  2001-01-29  $B=iHG8x3+(B
v1.1  2001-01-29  $B85$H$J$C$?LdBjE@$NJs9p<T$N%/%l%8%C%H$r=$@5(B
v1.2  2001-02-07  $B<eE@$N>\:Y$K4X$9$k5-=RDI2C$H(B, $B=$@5%Q%C%A$NE,MQ<j=g$N=$@5(B.


I.   $BGX7J(B - Background

inetd ident $B%5!<%P$O(B, RFC1413 $BG'>Z%5!<%P$N<BAu$N0l$D$G$9(B.
$B$3$NG'>Z%5!<%P$O(B, $B%j%b!<%H%5!<%S%9$K@\B3$7$F$$$k%f!<%6$N(B
$B%m!<%+%k%f!<%6L>$rJV$7$^$9(B.


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

$BFbIt%;%-%e%j%F%#4F::$K$h$j(B, inetd $B$KFbB"$5$l$F$$$k(B indent $B%5!<%P$O(B
$B%f!<%6$HL54X78$J%0%k!<%W8"8B$rIT@5$K@_Dj$9$k$H$$$&;v<B$,H/8+$5$l$^$7$?(B.
ident $B$O>o$K(B root $B%f!<%6%0%k!<%W8"8B$r;HMQ$9$k$?$a(B, $B$9$Y$F$N%f!<%6$O(B
wheel $B%0%k!<%W$,%"%/%;%92DG=$J%U%!%$%k$N(B ($B:G=i$NO"B3$9$k6uGrJ8;z$r(B
$B=|$$$?(B) $B@hF,(B 16 $B%P%$%H$rFI$`$3$H$,$G$-$k2DG=@-$,$"$j$^$9(B.  $B$?$@$7(B
$B$3$l$O(B, $BFbB"$N(B ident $B%5!<%S%9$,(B '-f' $B%U%i%0$D$-$G<B9T$5$l$k>l9g$K(B
$B8B$j$^$9(B.

'-f' $B%U%i%0$K$O$b$&0l$D(B, $B$"$kFCDj$N4D6-$G;R%W%m%;%9$N(B
inetd $B$,%V%m%C%/$9$k2DG=@-$,$"$k$H$$$&LdBj$,$"$j$^$9(B.
$B$3$l$K$h$j(B, $B0U?^E*$K%5!<%P$N%j%=!<%9$r8O3i>uBV$K$9$k$3$H$,(B
$B$G$-$k2DG=@-$,$"$j$^$9(B.

FreeBSD 3.5.1 $B$*$h$S(B FreeBSD 4.2 $B$r4^$`(B, $B=$@5F|0JA0$N$9$Y$F$N(B
FreeBSD $B%j%j!<%9$,(B, $B$3$NLdBj$N1F6A$r<u$1$^$9(B.


III. $B1F6AHO0O(B - Impact

$B$9$Y$F$N%f!<%6$O(B, wheel $B%0%k!<%W$,%"%/%;%92DG=$J%U%!%$%k$N(B
$B@hF,(B 16 $B%P%$%H$rFI$`$3$H$,2DG=$G$9(B.

$B$I$N%U%!%$%k$,FI$^$l$k2DG=@-$,$"$k$+D4$Y$k$K$O(B, root $B8"8B$G(B
$B<!$N%3%^%s%I$r<B9T$7$F$/$@$5$$(B.

# find / -group wheel \( -perm -40 -a \! -perm +4 \) -ls

inetd $B$KFbB"$5$l$F$$$k(B ident $B%5!<%P$O(B, $B%G%U%)%k%H>uBV$G(B
$BL58z2=$5$l$F$$$^$9(B.  $B$7$?$,$C$F(B, inetd $B$N(B indent $B5!G=$rL@<(E*$K(B
$BM-8z2=$7$F$$$J$1$l$P(B, $B$3$NLdBj$K$h$k%;%-%e%j%F%#>e$N<eE@$OB8:_$7$^$;$s(B.


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

$BFbB"$N(B ident $B%5!<%P$,M-8z2=$5$l$F$$$k>l9g$O(B, $B$=$l$rL58z2=$7$^$9(B.
/etc/inetd.conf $B$K$"$k(B, auth $B$G;O$^$j%*%W%7%g%s$K(B '-f' $B$r4^$`(B
$B$9$Y$F$N9T$r%3%a%s%H%"%&%H$7(B, $B<!$N$h$&$K(B SIGHUP $B$rAw$C$F(B inetd $B$r(B
$B:F5/F0$7$F$/$@$5$$(B.

# killall -HUP inetd


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

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

$B<eE@$r;}$C$?(B FreeBSD $B%7%9%F%`$r=$@5F|0J9_$N(B 3.5-STABLE $B$b$7$/$O(B
4.2-STABLE $B$K%"%C%W%0%l!<%I$7$^$9(B.

$B0J2<$N>l=j$K$"$k=$@5%Q%C%A$r8=:_MxMQCf$N%7%9%F%`$KE,MQ$7$F(B,
$B%7%9%F%`$r:F9=C[$7$^$9(B.

[FreeBSD 4.2 $B%Y!<%9%7%9%F%`$N>l9g(B]

# fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-01:11/inetd-4.2.patch
# fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-01:11/inetd-4.2.patch.asc

PGP $B%f!<%F%#%j%F%#$r;H$C$F(B PGP $B=pL>$r3NG'$7$^$9(B.

# cd /usr/src/
# patch -p < /path/to/patch
# cd /usr/src/usr.sbin/inetd
# make depend && make all install
# killall -HUP inetd

[FreeBSD 3.5.1 $B%Y!<%9%7%9%F%`$N>l9g(B]

# fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-01:11/inetd-3.5.1.patch
# fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-01:11/inetd-3.5.1.patch.asc

PGP $B%f!<%F%#%j%F%#$r;H$C$F(B PGP $B=pL>$r3NG'$7$^$9(B.

# cd /usr/src/
# patch -p < /path/to/patch
# cd /usr/src/usr.sbin/inetd
# make depend && make all install
# killall -HUP inetd


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$9(B.  $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.  

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

