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Bug 1429327 - SELinux gives denials for keepalived
Summary: SELinux gives denials for keepalived
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: selinux-policy
Version: 7.3
Hardware: x86_64
OS: Linux
medium
medium
Target Milestone: rc
: 7.4
Assignee: Lukas Vrabec
QA Contact: Milos Malik
URL:
Whiteboard:
Depends On:
Blocks: 1420851
TreeView+ depends on / blocked
 
Reported: 2017-03-06 06:03 UTC by Supreet
Modified: 2021-06-10 12:00 UTC (History)
8 users (show)

Fixed In Version: selinux-policy-3.13.1-174.el7
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2018-04-10 12:28:17 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2018:0763 0 None None None 2018-04-10 12:29:13 UTC

Description Supreet 2017-03-06 06:03:52 UTC 
Description of problem:
SELinux is preventing /usr/sbin/killall5 from using the sys_ptrace capability

Version-Release number of selected component (if applicable):
selinux-policy-3.13.1-102.el7.noarch
nginx-1.10.1-1.el7.ngx.x86_64  

How reproducible:
Reproducible using following /etc/keepalived/keepalived.conf config

vrrp_script chk_nginx {
  script "pidof nginx"
  interval 1
  weight 2
}


Upgraded : selinux-policy-targeted-3.13.1-102.el7_3.13.noarch.rpm selinux-policy-minimum-3.13.1-102.el7_3.13.noarch.rpm selinux-policy-3.13.1-102.el7_3.13.noarch.rpm


Actual results:
It logs the AVC's

Expected results:
It should not log the AVC's

Additional info:

Entry for check script in keepalived.conf :-

vrrp_script chk_proc {
  script "netstat -apn| grep :443| grep LISTEN"
  interval 1
  weight 2
}

Errors in the audit.log file :-

type=AVC msg=audit(1487763997.791:477734): avc:  denied  { sys_ptrace } for  pid=19588 comm="netstat" capability=19  scontext=system_u:system_r:keepalived_t:s0 tcontext=system_u:system_r:keepalived_t:s0 tclass=capability

type=AVC msg=audit(1487763997.791:477735): avc:  denied  { sys_ptrace } for  pid=19588 comm="netstat" capability=19  scontext=system_u:system_r:keepalived_t:s0 tcontext=system_u:system_r:keepalived_t:s0 tclass=capability

type=AVC msg=audit(1487763997.791:477736): avc:  denied  { sys_ptrace } for  pid=19588 comm="netstat" capability=19  scontext=system_u:system_r:keepalived_t:s0 tcontext=system_u:system_r:keepalived_t:s0 tclass=capability

type=AVC msg=audit(1487763997.791:477737): avc:  denied  { dac_override } for  pid=19588 comm="netstat" capability=1  scontext=system_u:system_r:keepalived_t:s0 tcontext=system_u:system_r:keepalived_t:s0 tclass=capability
type=AVC msg=audit(1487763997.791:477737): avc:  denied  { dac_read_search } for  pid=19588 comm="netstat" capability=2  scontext=system_u:system_r:keepalived_t:s0 tcontext=system_u:system_r:keepalived_t:s0 tclass=capability
Comment 6 Milos Malik 2017-09-07 10:29:47 UTC 
The "netstat -apn" command investigates running processes which leads to many SELinux denials. Here is the audit2allow output:

allow keepalived_t NetworkManager_t:process getattr;
allow keepalived_t auditd_t:process getattr;
allow keepalived_t chronyd_t:process getattr;
allow keepalived_t crond_t:process getattr;
allow keepalived_t dhcpc_t:process getattr;
allow keepalived_t gssproxy_t:process getattr;
allow keepalived_t init_t:process getattr;
allow keepalived_t policykit_t:process getattr;
allow keepalived_t postfix_master_t:process getattr;
allow keepalived_t postfix_pickup_t:process getattr;
allow keepalived_t postfix_qmgr_t:process getattr;
allow keepalived_t rhnsd_t:process getattr;
allow keepalived_t rpcbind_t:process getattr;
allow keepalived_t rpcd_t:process getattr;
allow keepalived_t self:capability sys_ptrace;
allow keepalived_t self:process getattr;
allow keepalived_t sshd_t:process getattr;
allow keepalived_t syslogd_t:process getattr;
allow keepalived_t system_cronjob_t:process getattr;
allow keepalived_t system_dbusd_t:process getattr;
allow keepalived_t systemd_logind_t:process getattr;
allow keepalived_t tuned_t:process getattr;
allow keepalived_t udev_t:process getattr;
allow keepalived_t unconfined_t:process getattr;

Already tested in permissive mode.
Comment 11 errata-xmlrpc 2018-04-10 12:28:17 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2018:0763
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