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Bug 400651 - /proc/pid/mem exploit still working
Summary: /proc/pid/mem exploit still working
Status: RESOLVED DUPLICATE of bug 399243
Alias: None
Product: Gentoo Security
Classification: Unclassified
Component: Kernel (show other bugs)
Hardware: AMD64 Linux
: Normal critical (vote)
Assignee: Gentoo Security
URL: http://git.zx2c4.com/CVE-2012-0056/pl...
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2012-01-24 23:00 UTC by Zoltan Puskas
Modified: 2012-01-24 23:08 UTC (History)
0 users

See Also:
Package list:
Runtime testing required: ---


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Description Zoltan Puskas 2012-01-24 23:00:01 UTC
After upgrading to the new kernel the /proc/pid/mem exploit still works!

Reproducible: Always

Steps to Reproduce:
1. Boot into gentoo-sources-3.2.1-r1 kernel
2. run expoit program mempodipper
3. enjoy root shell
Actual Results:  
test_user@anubis ~/Desktop $ uname -rvo
3.2.1-gentoo-r1 #1 SMP Tue Jan 24 22:55:05 CET 2012 GNU/Linux
test_user@anubis ~/Desktop $ gcc -o mempodipper mempodipper.c 
test_user@anubis ~/Desktop $ whoami
test_user
test_user@anubis ~/Desktop $ ./mempodipper 
===============================
=          Mempodipper        =
=           by zx2c4          =
=         Jan 21, 2012        =
===============================

[+] Ptracing su to find next instruction without reading binary.
[+] Creating ptrace pipe.
[+] Forking ptrace child.
[+] Waiting for ptraced child to give output on syscalls.
[+] Ptrace_traceme'ing process.
[+] Error message written. Single stepping to find address.
[+] Resolved call address to 0x402298.
[+] Opening socketpair.
[+] Waiting for transferred fd in parent.
[+] Executing child from child fork.
[+] Opening parent mem /proc/5120/mem in child.
[+] Sending fd 6 to parent.
[+] Received fd at 6.
[+] Assigning fd 6 to stderr.
[+] Calculating su padding.
[+] Seeking to offset 0x40228c.
[+] Executing su with shellcode.
sh-4.2# whoami
root
sh-4.2#


Expected Results:  
I do NOT get a root shell...

Portage 2.1.10.44 (default/linux/amd64/10.0/desktop/kde, gcc-4.5.3, glibc-2.14.1-r2, 3.2.1-gentoo-r1 x86_64)
=================================================================
System uname: Linux-3.2.1-gentoo-r1-x86_64-Intel-R-_Core-TM-2_Quad_CPU_Q6600_@_2.40GHz-with-gentoo-2.1
Timestamp of tree: Tue, 24 Jan 2012 03:00:01 +0000
app-shells/bash:          4.2_p20
dev-java/java-config:     2.1.11-r3
dev-lang/python:          2.7.2-r3, 3.2.2
dev-util/cmake:           2.8.7-r1
dev-util/pkgconfig:       0.26
sys-apps/baselayout:      2.1
sys-apps/openrc:          0.9.8.1
sys-apps/sandbox:         2.5
sys-devel/autoconf:       2.13, 2.68
sys-devel/automake:       1.9.6-r3, 1.11.2-r1
sys-devel/binutils:       2.22-r1
sys-devel/gcc:            4.4.6-r1, 4.5.3-r2
sys-devel/gcc-config:     1.5-r2
sys-devel/libtool:        2.4.2
sys-devel/make:           3.82-r3
sys-kernel/linux-headers: 3.2 (virtual/os-headers)
sys-libs/glibc:           2.14.1-r2
Repositories: gentoo
ACCEPT_KEYWORDS="amd64 ~amd64"
ACCEPT_LICENSE="* -@EULA"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-march=core2 -O2 -pipe"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/share/config /usr/share/gnupg/qualified.txt /usr/share/openvpn/easy-rsa"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/env.d/java/ /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c"
CXXFLAGS="-march=core2 -O2 -pipe"
DISTDIR="/usr/portage/distfiles"
FEATURES="assume-digests binpkg-logs distlocks ebuild-locks fixlafiles news parallel-fetch protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch"
FFLAGS=""
GENTOO_MIRRORS="http://gentoo.inf.elte.hu/ http://gd.tuwien.ac.at/opsys/linux/gentoo/ "
LANG="en_US.utf8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
MAKEOPTS="-j5"
PKGDIR="/usr/portage/packages"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY=""
SYNC="rsync://hyperion/gentoo-portage"
USE="X a52 aac acl acpi alsa amd64 bash-completion berkdb bluetooth branding bzip2 cairo cdda cdr cli consolekit cracklib crypt cups cxx dbus declarative dri dts dvd dvdr emboss encode exif fam firefox flac fortran gdbm gdu gif gphoto2 gpm handbook hardened iconv java6 javascipt joystick jpeg jpeg2k kde kipi lcms ldap libnotify mad mmx mng modules mp3 mp4 mpeg mudflap multilib ncurses nls nptl nptlonly ogg opengl openmp pam pango pcre pdf phonon plasma png policykit posix ppds pppd qt3support qt4 readline sdl semantic-desktop session smp spell sse sse2 sse3 ssl ssse3 startup-notification svg sysfs tcpd theora threads tiff truetype udev unicode usb vcd vim-syntax vorbis x264 xcb xcomposite xinerama xml xorg xpm xscreensaver xulrunner 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 mmap_emul mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="kexi words flow plan stage tables krita karbon braindump" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ubx" INPUT_DEVICES="keyboard mouse evdev joystick wacom" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" PHP_TARGETS="php5-3" RUBY_TARGETS="ruby18" SANE_BACKENDS="plustek" USERLAND="GNU" VIDEO_CARDS="nvidia" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account"
Unset:  CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LC_ALL, LINGUAS, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS
Comment 1 Alex Legler (RETIRED) archtester gentoo-dev Security 2012-01-24 23:08:01 UTC

*** This bug has been marked as a duplicate of bug 399243 ***