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Bug 557614 - /var/lib/squid not labeled correctly in selinux strict
Summary: /var/lib/squid not labeled correctly in selinux strict
Status: UNCONFIRMED
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: SELinux (show other bugs)
Hardware: All Linux
: Normal normal
Assignee: SE Linux Bugs
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2015-08-14 20:17 UTC by Shawn Kovalchick
Modified: 2015-09-12 20:38 UTC (History)
0 users

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


Attachments
squid_var_lib_t.patch (file_557614.txt,1.41 KB, patch)
2015-09-02 05:26 UTC, Jason Zaman
Details | Diff

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Description Shawn Kovalchick 2015-08-14 20:17:42 UTC
/var/lib/squid (and it's contents) are labeled var_lib_t, but squid expects them to be labeled differently.  Currently, strict expects one of the following: squid_log_t, var_run_t, var_t, squid_var_run_t, tmp_t, squid_tmpfs_t, tmpfs_t, var_log_t, squid_tmp_t, squid_cache_t.  Here are the avc errors and the associated audit2why:

~ # cat avc
Aug 14 11:33:24 hma2 kernel: audit: type=1400 audit(1439566404.199:28): avc:  denied  { write } for  pid=2241 comm="squid" name="squid" dev="sda3" ino=16199 scontext=system_u:system_r:squid_t tcontext=system_u:object_r:var_lib_t tclass=dir permissive=1
Aug 14 11:33:24 hma2 kernel: audit: type=1400 audit(1439566404.199:29): avc:  denied  { add_name } for  pid=2241 comm="squid" name="netdb.state" scontext=system_u:system_r:squid_t tcontext=system_u:object_r:var_lib_t tclass=dir permissive=1
Aug 14 11:33:24 hma2 kernel: audit: type=1400 audit(1439566404.199:30): avc:  denied  { create } for  pid=2241 comm="squid" name="netdb.state" scontext=system_u:system_r:squid_t tcontext=system_u:object_r:var_lib_t tclass=file permissive=1
Aug 14 11:33:24 hma2 kernel: audit: type=1400 audit(1439566404.199:31): avc:  denied  { append open } for  pid=2241 comm="squid" path="/var/lib/squid/netdb.state" dev="sda3" ino=7353 scontext=system_u:system_r:squid_t tcontext=system_u:object_r:var_lib_t tclass=file permissive=1

~ # audit2why < avc
#============= squid_t ==============

#!!!! The source type 'squid_t' can write to a 'dir' of the following types:
# squid_log_t, var_run_t, var_t, squid_var_run_t, tmp_t, squid_tmpfs_t, tmpfs_t, var_log_t, squid_tmp_t, squid_cache_t

allow squid_t var_lib_t:dir { write add_name };
allow squid_t var_lib_t:file { create open append };

Reproducible: Always

Steps to Reproduce:
echo 'POLICY_TYPES="strict targeted"' >> /etc/portage/make.conf
emerge -1v checkpolicy policycoreutils
FEATURES="-selinux" emerge -1v selinux-base
FEATURES="-selinux" emerge -v selinux-base-policy
emerge -uDNv @world
shutdown -r now
rlpkg -a -r
rc-update add selinux_gentoo boot
setsebool -P global_ssp on
setsebool -P ssh_sysadm_login on
semanage user -m -R "sysadm_r system_r" root
semanage user -m -R "staff_r sysadm_r system_r" staff_u
restorecon -RF /root
emerge -v squid
rc-update add squid default
run_init squid start

Actual Results:  
Errors in log (Still in permissive mode)

Expected Results:  
No avc errors

# emerge --info
Portage 2.2.20.1 (python 2.7.9-final-0, hardened/linux/amd64/selinux, gcc-4.8.4, glibc-2.20-r2, 4.1.4-hardened x86_64)
=================================================================
System uname: Linux-4.1.4-hardened-x86_64-Intel-R-_Xeon-R-_CPU_E5620_@_2.40GHz-with-gentoo-2.2
KiB Mem:     2053744 total,   1873572 free
KiB Swap:     262140 total,    262140 free
Timestamp of repository gentoo: Thu, 13 Aug 2015 13:30:01 +0000
sh bash 4.3_p39_pre0
ld GNU ld (Gentoo 2.24 p1.4) 2.24
app-shells/bash:          4.3_p39_pre0::gentoo
dev-lang/perl:            5.20.2::gentoo
dev-lang/python:          2.7.9-r1::gentoo, 3.4.1::gentoo
dev-util/pkgconfig:       0.28-r2::gentoo
sys-apps/baselayout:      2.2::gentoo
sys-apps/openrc:          0.17::gentoo
sys-apps/sandbox:         2.6-r1::gentoo
sys-devel/autoconf:       2.69::gentoo
sys-devel/automake:       1.15::gentoo
sys-devel/binutils:       2.24-r3::gentoo
sys-devel/gcc:            4.8.4::gentoo
sys-devel/gcc-config:     1.7.3::gentoo
sys-devel/libtool:        2.4.6::gentoo
sys-devel/make:           4.1-r1::gentoo
sys-kernel/linux-headers: 3.18::gentoo (virtual/os-headers)
sys-libs/glibc:           2.20-r2::gentoo
Repositories:

gentoo
    location: /usr/portage
    sync-type: rsync
    sync-uri: rsync://rsync.gentoo.org/gentoo-portage
    priority: -1000

ACCEPT_KEYWORDS="amd64"
ACCEPT_LICENSE="* -@EULA"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-march=core2 -O2 -pipe"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/gconf /etc/gentoo-release /etc/sandbox.d /etc/terminfo"
CXXFLAGS="-march=core2 -O2 -pipe"
DISTDIR="/usr/portage/distfiles"
FCFLAGS="-O2 -pipe"
FEATURES="assume-digests binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync news parallel-fetch preserve-libs protect-owned sandbox selinux sesandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr"
FFLAGS="-O2 -pipe"
GENTOO_MIRRORS="http://www.gtlib.gatech.edu/pub/gentoo ftp://ftp.gtlib.gatech.edu/pub/gentoo http://gentoo.mirrors.pair.com/ ftp://gentoo.mirrors.pair.com/"
LANG="en_US.utf8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
MAKEOPTS="-j2"
PKGDIR="/usr/portage/packages"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages"
PORTAGE_TMPDIR="/var/tmp"
USE="acl amd64 berkdb bindist bzip2 cli cracklib crypt cxx dri gdbm hardened iconv ipv6 justify mmx mmxext modules multilib ncurses nls nptl open_perms openmp pam pax_kernel pcre pie readline selinux session sse sse2 ssl ssp tcpd unconfined unicode urandom xattr xtpax zlib" ABI_X86="64" 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" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd 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 sheets stage tables krita karbon braindump author" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="mmx mmxext sse sse2" 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 ublox ubx" INPUT_DEVICES="keyboard mouse evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-5" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_4" RUBY_TARGETS="ruby19 ruby20" USERLAND="GNU" VIDEO_CARDS="fbdev glint intel mach64 mga nouveau nv r128 radeon savage sis tdfx trident vesa via vmware dummy v4l" 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, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON
Comment 1 Shawn Kovalchick 2015-08-14 20:19:25 UTC
Similar RedHat bug: https://bugzilla.redhat.com/show_bug.cgi?id=1195807

Maybe this directory is new and wasn't covered by an old policy?
Comment 2 Sven Vermeulen (RETIRED) gentoo-dev 2015-08-16 16:50:16 UTC
Seems indeed like the location is new.

Can you provide the output of the following command? I'll see if I can do the proper label mappings on sight.

~$ find /var/lib/squid

This'll show all the content of this location.
Comment 3 Shawn Kovalchick 2015-08-16 21:15:28 UTC
~$ find /var/lib/squid
/var/lib/squid
/var/lib/squid/netdb.state
/var/lib/squid/.keep_net-proxy_squid-0
Comment 4 Jason Zaman gentoo-dev 2015-09-02 05:26:54 UTC
Created attachment 410832 [details, diff]
squid_var_lib_t.patch

Can you test out these rules and see if everything works as it should?
Comment 5 Sven Vermeulen (RETIRED) gentoo-dev 2015-09-12 20:38:48 UTC
If the /var/lib/squid location is meant to contain the cache, we might reuse squid_cache_t ?

According to http://www.squid-cache.org/Doc/config/netdb_filename/ the netdb.state file is more a logfile like one?