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Subject: [doc-jp 7289] Re: ANNOUNCE: FreeBSD Security Advisory: FreeBSD-SA-00:12.healthd
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$B:4F#!wEl5~M}2JBg3X$G$9!#(B

 SA-00:12.healthd $B$NK]Lu$G$9!#(B

 $B$3$A$i$b!"%X%C%@$N!V%Y%s%@$NBP1~!W$O(B vendor status $B$NK]Lu$G$9!#(B

===================================

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

  Subject: ANNOUNCE: FreeBSD Security Advisory: FreeBSD-SA-00:12.healthd
  From: FreeBSD Security Officer <security-officer@freebsd.org>
  Date: Mon, 10 Apr 2000 13:59:33 -0700 (PDT)
  Message-Id: <200004102059.NAA07231@freefall.freebsd.org>
  X-Sequence: announce-jp 414

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

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 $B%Q%C%AEy$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$,(B
 $B;29M$N$?$a$KDs6!$9$k$b$N$G(B, $BK]Lu<T$*$h$S(B doc-jp $B$O(B $B$=$NFbMF$K$D$$$F(B
 $B$$$+$J$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-00:12                                           Security Advisory
                                                                FreeBSD, Inc.

$B%H%T%C%/(B:	healthd allows a local root compromise

$BJ,N`(B:           ports
$B%b%8%e!<%k(B:     healthd
$B9pCNF|(B:         2000-04-10
$B>pJsDs6!(B:       FreeBSD Ports Collection $B$ND4::Cf$KH/8+(B
$B1F6AHO0O(B:       $B=$@5F|0JA0$N(B Ports Collection
$B=$@5F|(B:         2000-03-25
$B%Y%s%@$NBP1~(B:	$B99?7HG$,8x3+:Q$_(B
FreeBSD $B$K8GM-$+(B:   NO

I.   $BGX7J(B - Background

healthd is a small utility for monitoring the temperature, fan speed
and voltage levels of certain motherboards.

healthd $B$O(B, $B$"$k<o$N%^%6!<%\!<%I$N29EY$d%U%!%s2sE>B.EY(B, $BEE05%l%Y%k$r(B
$B4F;k$9$k$?$a$N>.$5$J%f!<%F%#%j%F%#$G$9(B.  

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

healthd v0.3 installs a utility which is setuid root in order to
monitor the system status. This utility contains a trivial buffer
overflow which allows an unprivileged local user to obtain root
privileges on the system.

healthd v0.3 $B$O%7%9%F%`$N>uBV$r4F;k$9$k$?$a$K(B root $B$G(B setuid $B$5$l$?(B
$B%f!<%F%#%j%F%#$r%$%s%9%H!<%k$7$^$9$,(B, $B$3$N%f!<%F%#%j%F%#$K$O(B
$B>.$5$J%P%C%U%!%U%m!<LdBj$,B8:_$7$^$9(B.  $B$3$NLdBj$K$h$j(B, $BFC8"$r;}$?$J$$(B
$B%m!<%+%k%f!<%6$OMxMQ$7$F$$$k%7%9%F%`$N(B root $B8"8B$rF@$k$3$H$,2DG=$G$9(B.  

The healthd port is not installed by default, nor is it "part of
FreeBSD" as such: it is part of the FreeBSD ports collection, which
contains over 3200 third-party applications in a ready-to-install
format. The ports collection shipped with FreeBSD 4.0 contains this
problem since it was discovered after the release.

FreeBSD makes no claim about the security of these third-party
applications, although an effort is underway to provide a security
audit of the most security-critical ports.

healthd $B$N(B port $B$O(B, $B%G%U%)%k%H$G%$%s%9%H!<%k$5$l$k$b$N$G$O$J$/(B, 
FreeBSD $B%7%9%F%`$N0lIt$r9=@.$9$k$b$N$G$b$"$j$^$;$s(B.  $B$=$l$O(B, 3200 $B$r(B
$BD6$($k%5!<%I%Q!<%F%#@=$N%"%W%j%1!<%7%g%s$,$9$0$K%$%s%9%H!<%k$G$-$k7A$G(B
$B<}$a$i$l$F$$$k(B FreeBSD Ports Collection $B$N0lIt$G$9(B.  $B$3$N%;%-%e%j%F%#>e$N(B
$B<eE@$,H/8+$5$l$?$N$,%j%j!<%9;~E@$h$j8e$G$"$C$?$3$H$+$i(B, FreeBSD 4.0 $B$K(B
$B4^$^$l$k(B Ports Collection $B$K$b(B, $B$3$NLdBj$,B8:_$7$^$9(B.  

FreeBSD $B$G$O(B, $B$3$N$h$&$J%5!<%I%Q!<%F%#@=%"%W%j%1!<%7%g%s$N%;%-%e%j%F%#LdBj$K(B
$BBP$7$F(B, $BFC$K2?$+$r<gD%$9$k$3$H$O$"$j$^$;$s(B($BLuCm(B: Ports Collection $B$KF~$C$F(B
$B$$$k$+$i$H$$$C$F(B, FreeBSD $B$N3+H/<T$?$A$,$=$N%"%W%j%1!<%7%g%s$,0BA4$G$"$k$H(B
$BI>2A$7$?$o$1$G$O$"$j$^$;$s(B). $B$?$@$7(B, $B%;%-%e%j%F%#LdBj$KBP$7$FBg$-$J1F6A$r(B
$B;}$D$h$&$J(B ports $B$KBP$9$k%;%-%e%j%F%#4F::$rDs6!$9$Y$/(B, $B8=:_EXNOCf$G$9(B. 

III. $B1F6AHO0O(B - Impact

A local user can obtain root privileges by exploiting a vulnerability
in the healthd utility.

healthd $B%f!<%F%#%j%F%#$K$"$k%;%-%e%j%F%#>e$N<eE@$r0-MQ$9$k$3$H$G(B, 
$B%m!<%+%k%f!<%6$,(B root $B8"8B$rF@$k$3$H$,$G$-$^$9(B.  

If you have not chosen to install the healthd port/package, then your
system is not vulnerable.

healthd $B$N(B port $B$b$7$/$O(B package $B$r%$%s%9%H!<%k$7$F$$$J$1$l$P(B, $B$=$N(B
$B%7%9%F%`$K(B, $B$3$NLdBj$K$h$k%;%-%e%j%F%#>e$N<eE@$O$"$j$^$;$s(B.  

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

Remove the healthd port, if you you have installed it.

healthd $B$N(B port $B$,%$%s%9%H!<%k$5$l$F$$$k>l9g$K$O(B, $B$=$l$r:o=|$7$F$/$@$5$$(B.  

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

1) Upgrade your entire ports collection and rebuild the healthd port.

1) Ports Collection $BA4BN$r99?7$7$F(B, healthd $B$N(B port $B$r:F%3%s%Q%$%k$9$k(B.  

2) Reinstall a new package dated after the correction date, obtained from:

2) $B0J2<$N>l=j$+$i(B, $B=$@5F|$h$j8e$K:n@.$5$l$??7$7$$(B package $B$rF~<j$7$F(B
   $B:F%$%s%9%H!<%k$9$k(B.

ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-3-stable/sysutils/healthd-0.3.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-3-stable/sysutils/healthd-0.3.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-3-stable/sysutils/healthd-0.3.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/sysutils/healthd-0.3.tgz
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-5-current/sysutils/healthd-0.3.tgz

3) download a new port skeleton for the healthd port from:

and use it to rebuild the port.

3) $B0J2<$N>l=j$+$i(B healthd $B$N(B $B?7$7$$(B port $B%9%1%k%H%s$r%@%&%s%m!<%I$7(B, 
   $B$=$l$rMxMQ$7$F(B healthd $B$N(B port $B$r:F%3%s%Q%$%k$9$k(B.  

http://www.freebsd.org/ports/

4) Use the portcheckout utility to automate option (3) above. The
portcheckout port is available in /usr/ports/devel/portcheckout or the
package can be obtained from:

4) portcheckout $B%f!<%F%#%j%F%#$r;H$&$H(B, $B>e5-(B (3) $B$r<+F0E*$K(B
   $B9T$J$&$3$H$,$G$-$^$9(B.  portcheckout $B$O(B,
   /usr/ports/devel/portcheckout $B$d(B, $B0J2<$N>l=j$+$iF~<j2DG=$G$9(B. 

ftp://ftp.freebsd.org/pub/FreeBSD/ports/packages/devel/portcheckout-1.0.tgz
