[CentOS] Centos7 & Selinux & Tor

Robin Lee robinlee at mailbox.org
Tue Oct 23 18:49:03 UTC 2018


On Sun, 2018-10-14 at 20:13 +0200, Robin Lee wrote:
> I've just encountered a problem starting tor. When I do 'systemctl
> start tor' it fails and I get selinux errors in the log. There was
> suggestion to do full auditing with 'auditctl -w /etc/shadow -p w'.
> Which I did and it gave the following
> 
> type=PROCTITLE msg=audit(1539540150.692:60570):
> proctitle=2F7573722F62696E2F746F72002D2D72756E61736461656D6F6E0030002
> D2
> D64656661756C74732D746F727263002F7573722F73686172652F746F722F64656661
> 75
> 6C74732D746F727263002D66002F6574632F746F722F746F727263002D2D766572696
> 67
> 92D636F6E666967
> 
> type=PATH msg=audit(1539540150.692:60570): item=0
> name="/var/lib/tor/hidden_service/" inode=201616393 dev=fd:02
> mode=040700 ouid=494 ogid=490 rdev=00:00
> obj=system_u:object_r:tor_var_lib_t:s0 objtype=NORMAL
> cap_fp=0000000000000000 cap_fi=0000000000000000 cap_fe=0 cap_fver=0
> 
> type=CWD msg=audit(1539540150.692:60570):  cwd="/"
> 
> type=SYSCALL msg=audit(1539540150.692:60570): arch=c000003e syscall=2
> success=no exit=-13 a0=562d3767da80 a1=20000 a2=0 a3=1 items=1 ppid=1
> pid=18283 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0
> sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="tor"
> exe="/usr/bin/tor"
> subj=system_u:system_r:tor_t:s0 key=(null)
> 
> type=AVC msg=audit(1539540150.692:60570): avc:  denied  {
> dac_read_search } for  pid=18283 comm="tor"
> capability=2  scontext=system_u:system_r:tor_t:s0
> tcontext=system_u:system_r:tor_t:s0 tclass=capability
> 
> type=AVC msg=audit(1539540150.692:60570): avc:  denied  {
> dac_override
> } for  pid=18283 comm="tor"
> capability=1  scontext=system_u:system_r:tor_t:s0
> tcontext=system_u:system_r:tor_t:s0 tclass=capability
> 
> So I had a look at the permissions for /var/lib/tor/hidden_service/
> and
> they were 
> 
> drwx------. toranon toranon system_u:object_r:tor_var_lib_t:s0
> hidden_service

Still trying to figure out this selinux issue :( 

Perhaps somebody could point me to the best mailing list/forum/tracker
for this kind of issue?

Cheers
Robin




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