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References: <200303212052.h2LKqYWw013362@freefall.freebsd.org>
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Subject: Re: ANNOUNCE: FreeBSD Security Advisory FreeBSD-SA-03:06.openssl
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FreeBSD $B%;%-%e%j%F%#4+9p(B $BF|K\8lHG(B
=============================================================================
FreeBSD-SA-03:06.openssl (2003-03-21)
 * OpenSSL timing-based SSL/TLS attack
=============================================================================

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

  Subject: ANNOUNCE: FreeBSD Security Advisory FreeBSD-SA-03:06.openssl
  From: FreeBSD Security Advisories <security-advisories@FreeBSD.ORG>
  Date: Fri, 21 Mar 2003 12:52:34 -0800 (PST)
  Message-Id: <200303212052.h2LKqYWj013371@freefall.freebsd.org>
  X-Sequence: announce-jp 1115

 $B$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-03:06.openssl                                    Security Advisory
                                                          The FreeBSD Project

$B%H%T%C%/(B:       OpenSSL $B$N(B SSL/TLS $B$KBP$9$k%?%$%_%s%0%Y!<%9967b(B
                (OpenSSL timing-based SSL/TLS attack)

$BJ,N`(B:           crypto
$B%b%8%e!<%k(B:     openssl
$B9pCNF|(B:         2003-03-21
$B%/%l%8%C%H(B:     Vlastimil Klima, Ondrej Pokorny, Tomas Rosa
$B1F6AHO0O(B:       4.6.2-RELEASE-p12, 4.7-RELEASE-p9, 5.0-RELEASE-p6
                $B$h$jA0$N!"$9$Y$F$N%j%j!<%9(B
$B=$@5F|(B:         2003-03-20 21:07:20 UTC (RELENG_4)
                2003-03-21 16:12:34 UTC (RELENG_4_7)
                2003-03-21 16:12:03 UTC (RELENG_4_6)
                2003-03-21 16:13:06 UTC (RELENG_5_0)
FreeBSD $B$K8GM-$+(B:       NO


I.  $BGX7J(B - Background

FreeBSD $B$K$O!"(BOpenSSL $B%W%m%8%'%/%H$K$h$k%=%U%H%&%'%"$,4^$^$l$F$$$^$9!#(B
OpenSSL $B%W%m%8%'%/%H$O!"(BSecure Sockets Layer (SSL v2/v3) $B$*$h$S(B
Transport Layer Security (TLS v1) $B$K2C$(!"I}9-$$0E9f6/EY$KBP1~$7$?(B
$BHFMQ$N0E9f%i%$%V%i%j$r<BAu$9$k$?$a$N!"6/8G$G>&IJ$H$7$FDLMQ$9$kIJ<A$r;}$A!"(B
$B==J,$J5!G=$rHw$($?%*!<%W%s%=!<%9$N%D!<%k%-%C%H$N3+H/$r6(NO$7$F9T$J$C$F$$$k(B
$B%W%m%8%'%/%H$G$9!#(B


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

$B$3$N4+9p$G$O!"(BOpenSSL $B$G:G6a=$@5$5$l$?(B 2 $B<oN`$N0[$J$k<eE@$K$D$$$F(B
$B07$C$F$$$^$9!#$=$N<eE@$H$O!"(B(1) RSA $B$N%?%$%_%s%0967b$H!"(B
(2) Klima-Pokorny-Rosa $B967b$G$9!#(B

- - - OpenSSL $B%W%m%8%'%/%H$N4+9p(B ($B;29M;qNA$r;2>H(B) $B$h$j0zMQ(B:

(1) $B8&5f<T$i$O!"(BOpenSSL $B$N(B RSA $B%V%i%$%s%G%#%s%05!G=$r;H$o$J$$>l9g$K(B
    $BM-8z$J!"(BRSA $B0E9f80$KBP$9$k%?%$%_%s%0967bJ}K!$rH/8+$7$?!"$HH/I=$7$^$7$?!#(B

(2) $B%A%'%3$N0E9f3X<T(B Vlastimil Klima $B;a(B, Ondrej Pokorny $B;a(B,
    Tomas Rosa $B;a$O!"(BSSL 3.0 $B$*$h$S(B TLS 1.0 $B$G;H$o$l$F$$$k(B
    PKCS #1 v1.5 $B%Q%G%#%s%0J}<0$N(B RSA $B0E9f$KM-8z$J!"(B
    $B!V(BBleichenbacher $B967b!W$r3HD%$7$?967bJ}K!$r9M0F$7$^$7$?!#(B
    $B$3$N967bJ}K!$G$O!"$^$:%5!<%P$KBP$7$F?tI4K|$N(B SSL/TLS $B@\B3$r(B
    $BF1;~$K9T$J$&I,MW$,$"$j$^$9!#$=$7$F$=$N;~$K!"FC<l$J:Y9)$r(B
    $B;\$7$?(B RSA $B0E9fJ8$KBP$9$k%5!<%P$NF0:n$r4Q;!$7$^$9!#(B
    $B$=$N7k2L$h$j!"%5!<%P$N(B RSA $B80$r;H$C$?0E9fJ8$KBP$7$F!"(B
    $B$R$H$D$N(B RSA $BHkL)80A`:n$r9T$J$&$3$H$,2DG=$K$J$k$h$&$J!"(B
    $B=EMW$J>pJs$rF@$k$3$H$,2DG=$G$9!#$?$@$7!"$3$N967b$G%5!<%P$N(B
    RSA $B80$,6<0R$K$5$i$5$l$k$3$H$O$"$j$^$;$s!#(B


III.  $B1F6AHO0O(B - Impact

RSA $B%?%$%_%s%0967b(B:

  RSA $BHkL)80$,IT@5$KMxMQ$5$l$k2DG=@-$,$"$j$^$9!#(B

Klima-Pokorny-Rosa $B967b(B:

  $B<eE@$r;}$C$?%5!<%P$O!"FC<l$J:Y9)$,;\$5$l$?(B RSA $B0E9fJ8$r(B
  $B<u$1<h$C$?:]$K!"967b<T$+$i%5!<%P$N(B RSA $B80$r;H$C$?0E9fJ8$KBP$7$F!"(B
  $B$R$H$D$N(B RSA $BHkL)80A`:n$r9T$J$&$3$H$,2DG=$K$J$k$h$&$J!"(B
  $B=EMW$J>pJs$,O31L$9$k4m81@-$,$"$j$^$9!#$?$@$7!"$3$N967b$G%5!<%P$N(B
  RSA $B80$,6<0R$K$5$i$5$l$k$3$H$O$"$j$^$;$s!#(B


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

RSA $B%?%$%_%s%0967b(B:

  RSA $B$rL58z$K$9$k!"$b$7$/$O(B RSA_blinding_on() $B4X?t$r;H$C$F(B
  OpenSSL $B$N(B RSA $B%V%i%$%s%G%#%s%05!G=$rM-8z$K$7$^$9!#$I$NJ}<0$,(B
  $BBeBX$H$7$F$U$5$o$7$$$+$O!"$=$l$rMxMQ$9$k%"%W%j%1!<%7%g%s$K(B
  $B$h$j$^$9!#>\:Y$O!"MxMQ$7$F$$$k%"%W%j%1!<%7%g%s$NJ8=q$r;2>H$7$F$/$@$5$$!#(B


Klima-Pokorny-Rosa $B967b(B:

  SSL $B$b$7$/$O(B TLS $B$K$*$$$F!"(BPKCS #1 v1.5 $B%Q%G%#%s%0$r;H$&0E9f2=J}<0$r(B
  $BL58z$K$7$^$9!#$I$NJ}<0$,BeBX$H$7$F$U$5$o$7$$$+$O!"$=$l$rMxMQ$9$k(B
  $B%"%W%j%1!<%7%g%s$K$h$j$^$9!#>\:Y$O!"MxMQ$7$F$$$k%"%W%j%1!<%7%g%s$N(B
  $BJ8=q$r;2>H$7$F$/$@$5$$!#(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$N(B 4-STABLE $B%V%i%s%A!"(B
   $B$b$7$/$O=$@5F|0J9_$N(B RELENG_4_7 (4.7-RELEASE-p9)$B!"(B
   RELENG_4_6 (4.6.2-RELEASE-p12)$B!"(BRELENG_5_0 (5.0-RELEASE-p6)
   $B%;%-%e%j%F%#%V%i%s%A$N$$$:$l$+$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-SA-03:02.openssl $B$NLdBj$r2r7h$9$k(B
$B=$@5%Q%C%A$,E,MQ$:$_$N(B FreeBSD 4.6$B!"(BFreeBSD 4.7$B!"(BFreeBSD 5.0 $B$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

# fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-03:06/openssl.patch
# fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-03:06/openssl.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/en_US.ISO8859-1/books/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

$B%V%i%s%A(B                                                         $B%j%S%8%g%s(B
  $B%Q%9L>(B
- -------------------------------------------------------------------------
RELENG_4
  src/crypto/openssl/crypto/rsa/rsa_eay.c                         1.2.4.6
  src/crypto/openssl/crypto/rsa/rsa_lib.c                         1.2.2.7
  src/crypto/openssl/ssl/s3_srvr.c                            1.1.1.1.2.7
RELENG_4_6
  src/UPDATING                                             1.73.2.68.2.39
  src/crypto/openssl/crypto/rsa/rsa_eay.c                     1.2.4.2.6.3
  src/crypto/openssl/crypto/rsa/rsa_lib.c                     1.2.2.3.6.2
  src/crypto/openssl/ssl/s3_srvr.c                        1.1.1.1.2.3.6.3
  src/sys/conf/newvers.sh                                  1.44.2.23.2.29
RELENG_4_7
  src/UPDATING                                             1.73.2.74.2.11
  src/crypto/openssl/crypto/rsa/rsa_eay.c                     1.2.4.3.2.2
  src/crypto/openssl/crypto/rsa/rsa_lib.c                     1.2.2.4.2.1
  src/crypto/openssl/ssl/s3_srvr.c                        1.1.1.1.2.5.2.1
  src/sys/conf/newvers.sh                                  1.44.2.26.2.11
RELENG_5_0
  src/UPDATING                                                 1.229.2.11
  src/crypto/openssl/crypto/rsa/rsa_eay.c                         1.8.2.2
  src/crypto/openssl/crypto/rsa/rsa_lib.c                         1.6.2.2
  src/crypto/openssl/ssl/s3_srvr.c                            1.1.1.9.2.2
  src/sys/conf/newvers.sh                                         1.6.2.2
- -------------------------------------------------------------------------


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

<URL: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0131 >
<URL: http://eprint.iacr.org/2003/052/ >
<URL: http://www.openssl.org/news/secadv_20030317.txt >
<URL: http://www.openssl.org/news/secadv_20030319.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/doc/en_US.ISO8859-1/books/handbook/mirrors.html ($B1QJ8(B)
 http://www.FreeBSD.org/doc/ja_JP.eucJP/books/handbook/mirrors.html ($BF|K\8lLu(B)

$B$K$^$H$a$i$l$F$$$^$9!#(B
