Bug 188799 – dev-libs/openssl < 0.9.8e-r2 Montgomery Exponentiation Side-Channel Local Information Disclosure (CVE-2007-3108)

• Product: Gentoo Security
• Status: RESOLVED FIXED

[Description Bernd Marienfeldt 2007-08-14 08:38:10 UTC]

Some implementations of RSA may contain a vulnerability that could allow a local attacker to retrieve encryption keys.

The BN_from_montgomery function in crypto/bn/bn_mont.c in OpenSSL 0.9.8e and earlier does not properly perform Montgomery multiplication, which might allow local users to conduct a side-channel attack and retrieve RSA private keys.



Reproducible: Always

[Comment 1 Raphael Marichez (Falco) (RETIRED) 2007-08-14 09:37:10 UTC]

It's hardly a security issue as for me, rather a simple bug. But we will handle this as a security issue and vote for a GLSA or not at the end.

A patch has been published by upstream:
http://cvs.openssl.org/chngview?cn=16275

[Comment 2 SpanKY 2007-08-25 16:08:32 UTC]

openssl-0.9.8e-r2 now in the tree with the upstream fix:
http://openssl.org/news/patch-CVE-2007-3108.txt

[Comment 3 Pierre-Yves Rofes (RETIRED) 2007-08-25 17:13:10 UTC]

thanks Mike.
Arches, please test and mark stable dev-libs/openssl-0.9.8e-r2.
Target keywords are: "alpha amd64 arm hppa ia64 m68k mips ppc ppc64 s390 sh sparc x86"

[Comment 4 Raúl Porcel (RETIRED) 2007-08-25 20:52:40 UTC]

alpha/ia64/x86 stable

[Comment 5 Gustavo Zacarias (RETIRED) 2007-08-27 13:14:45 UTC]

sparc stable.

[Comment 6 Jeroen Roovers (RETIRED) 2007-08-27 20:36:49 UTC]

Stable for HPPA.

[Comment 7 Tobias Scherbaum (RETIRED) 2007-08-28 19:15:51 UTC]

ppc stable

[Comment 8 Kenneth Prugh (RETIRED) 2007-08-28 20:16:24 UTC]

dev-libs/openssl-0.9.8e-r2 on AMD64:

Emerges fine, No Collisions. Works fine, tested with openssh.

Portage 2.1.2.12 (default-linux/amd64/2007.0, gcc-4.1.2, glibc-2.5-r4, 2.6.23-rc1 x86_64)
=================================================================
System uname: 2.6.23-rc1 x86_64 Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz
Gentoo Base System release 1.12.9
Timestamp of tree: Tue, 28 Aug 2007 19:00:01 +0000
app-shells/bash:     3.2_p17
dev-java/java-config: 1.3.7, 2.0.33-r1
dev-lang/python:     2.4.4-r4
dev-python/pycrypto: 2.0.1-r6
sys-apps/baselayout: 1.12.9-r2
sys-apps/sandbox:    1.2.17
sys-devel/autoconf:  2.13, 2.61
sys-devel/automake:  1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2, 1.10
sys-devel/binutils:  2.17
sys-devel/gcc-config: 1.3.16
sys-devel/libtool:   1.5.24
virtual/os-headers:  2.6.21
ACCEPT_KEYWORDS="amd64"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-O2 -march=nocona -fomit-frame-pointer -pipe"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/kde/3.5/env /usr/kde/3.5/share/config /usr/kde/3.5/shutdown /usr/share/X11/xkb /usr/share/config"
CONFIG_PROTECT_MASK="/etc/env.d /etc/env.d/java/ /etc/gconf /etc/php/apache2-php5/ext-active/ /etc/php/cgi-php5/ext-active/ /etc/php/cli-php5/ext-active/ /etc/revdep-rebuild /etc/terminfo /etc/texmf/web2c"
CXXFLAGS="-O2 -march=nocona -fomit-frame-pointer -pipe"
DISTDIR="/usr/portage/distfiles"
FEATURES="collision-protect distlocks metadata-transfer multilib-strict sandbox sfperms strict test"
GENTOO_MIRRORS="http://gentoo.osuosl.org/ http://distro.ibiblio.org/pub/linux/distributions/gentoo/ http://www.gtlib.gatech.edu/pub/gentoo "
MAKEOPTS="-j3"
PKGDIR="/packages"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --delete-after --stats --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages --filter=H_**/files/digest-*"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY="/usr/local/portage"
SYNC="rsync://rsync.gentoo.org/gentoo-portage"
USE="X aac acl alsa amd64 berkdb bitmap-fonts cli cracklib crypt cups dbus dri flac fortran gdbm gpm hal iconv isdnlog jpeg kde kdeenablefinal mad midi mmx mp3 mpeg mudflap ncurses nls nptl nptlonly ogg opengl openmp oss pam pcre perl png pppd python qt4 readline reflection session spl sse sse2 ssl symlink tcpd test truetype truetype-fonts type1-fonts unicode vorbis xml xorg zlib" ALSA_CARDS="usb-audio hda-intel" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mulaw multi null plug rate route share shm softvol" ELIBC="glibc" INPUT_DEVICES="keyboard mouse evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" USERLAND="GNU" VIDEO_CARDS="nvidia"
Unset:  CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG, LC_ALL, LDFLAGS, LINGUAS, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS

[Comment 9 Jonas Pedersen 2007-08-28 20:20:10 UTC]

dev-libs/openssl-0.9.8e-r2  USE="(sse2) test zlib -bindist -emacs"

1. emerges without problems. 
2. No collisions etc. and passes test. 
3. works with openssh. 

Double testing ftw. on AMD64. 

Portage 2.1.2.12 (default-linux/amd64/2007.0/desktop, gcc-4.1.2, glibc-2.5-r4, 2.6.22-gentoo-r2 x86_64)
=================================================================
System uname: 2.6.22-gentoo-r2 x86_64 Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz
Gentoo Base System release 1.12.9
Timestamp of tree: Tue, 28 Aug 2007 19:50:01 +0000
distcc 2.18.3 x86_64-pc-linux-gnu (protocols 1 and 2) (default port 3632) [enabled]
ccache version 2.4 [enabled]
app-shells/bash:     3.2_p17
dev-java/java-config: 1.3.7, 2.0.33-r1
dev-lang/python:     2.4.4-r4
dev-python/pycrypto: 2.0.1-r6
dev-util/ccache:     2.4-r7
sys-apps/baselayout: 1.12.9-r2
sys-apps/sandbox:    1.2.17
sys-devel/autoconf:  2.13, 2.61
sys-devel/automake:  1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2, 1.10
sys-devel/binutils:  2.17
sys-devel/gcc-config: 1.3.16
sys-devel/libtool:   1.5.24
virtual/os-headers:  2.6.21
ACCEPT_KEYWORDS="amd64"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-march=nocona -Os -msse3 -pipe -fomit-frame-pointer"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/kde/3.5/env /usr/kde/3.5/share/config /usr/kde/3.5/shutdown /usr/share/X11/xkb /usr/share/config"
CONFIG_PROTECT_MASK="/etc/env.d /etc/env.d/java/ /etc/gconf /etc/php/apache2-php5/ext-active/ /etc/php/cgi-php5/ext-active/ /etc/php/cli-php5/ext-active/ /etc/revdep-rebuild /etc/splash /etc/terminfo"
CXXFLAGS="-march=nocona -Os -msse3 -pipe -fomit-frame-pointer"
DISTDIR="/usr/portage/distfiles"
FEATURES="ccache collision-protect distcc distlocks metadata-transfer multilib-strict parallel-fetch sandbox sfperms strict test"
GENTOO_MIRRORS="http://ftp.belnet.be/mirror/rsync.gentoo.org/gentoo/ http://ftp.du.se/pub/os/gentoo http://trumpetti.atm.tut.fi/gentoo/ http://ftp.snt.utwente.nl/pub/os/linux/gentoo http://ds.thn.htu.se/linux/gentoo"
LC_ALL="en_DK.utf8"
MAKEOPTS="-j6"
PKGDIR="/usr/portage/packages"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --delete-after --stats --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages --filter=H_**/files/digest-*"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY="/usr/portage/local/layman/php-testing /usr/local/portage"
SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage"
USE="X a52 aac acl acpi aiglx alsa amd64 apache2 arts atk berkdb bitmap-fonts cairo cdr cli cracklib crypt cups dbus dga directfb dri dts dvd dvdr dvdread eds emboss encode evo fam fbcn ffmpeg firefox fortran ftp gd gdbm gif gphoto2 gpm gstreamer gtk hal iconv icq ieee1394 ipv6 isdnlog java jpeg kde kerberos lm_sensors mad midi mikmod mjpeg mmx mozilla mp2 mp3 mpeg mplayer msn mudflap ncurses nls nptl nptlonly ogg oggvorbis opengl openmp pam pcre pda pdf perl png ppds pppd python qt qt3 qt3support qt4 quicktime readline reflection samba sdl session spell spl sse sse2 sse3 ssl svg tcpd test threads tiff truetype truetype-fonts type1-fonts unicode vorbis x264 xcomposite xml xorg xscreensaver xv xvid zlib" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mulaw multi null plug rate route share shm softvol" ELIBC="glibc" INPUT_DEVICES="keyboard mouse" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" USERLAND="GNU" VIDEO_CARDS="radeon"
Unset:  CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG, LDFLAGS, LINGUAS, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS

[Comment 10 Christoph Mende (RETIRED) 2007-08-28 20:24:03 UTC]

weeee! amd64 stable

[Comment 11 Markus Rothe (RETIRED) 2007-08-29 10:14:09 UTC]

ppc64 stable

[Comment 12 Sune Kloppenborg Jeppesen (RETIRED) 2007-09-08 15:37:32 UTC]

This one is ready for GLSA decision. I vote YES.

[Comment 13 Matt Drew (RETIRED) 2007-09-09 22:20:04 UTC]

I'll vote yes - not serious, but notable.

[Comment 14 Robert Buchholz (RETIRED) 2007-09-30 01:37:08 UTC]

Removing mips in favour of bug 194039.

Since that bug is A2 right now, it should be considered for inclusion in this GLSA.

[Comment 15 Pierre-Yves Rofes (RETIRED) 2007-10-07 21:45:59 UTC]

GLSA 200710-06