Bug 1154196
| Summary: | dhcrelay triggers { setpcap } AVC | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Milos Malik <mmalik> |
| Component: | selinux-policy | Assignee: | Miroslav Grepl <mgrepl> |
| Status: | CLOSED ERRATA | QA Contact: | Milos Malik <mmalik> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 7.1 | ||
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | selinux-policy-3.13.1-7.el7 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2015-03-05 10:46:13 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
Yes, it makes sense to allow it. commit fcbcc51eacebb57c777eb8a3c203f95486104d6d
Author: Miroslav Grepl <mgrepl>
Date: Tue Oct 21 16:01:26 2014 +0200
Allow setpcap capability for dhcpd.
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://rhn.redhat.com/errata/RHBA-2015-0458.html |
Description of problem: It's a bit confusing - does not matter if SELinux is enforcing or permissive, following lines appear in the journal always: Dropped all unnecessary capabilities. Dropped all capabilities. Version-Release number of selected component (if applicable): dhcp-4.2.5-32.el7.x86_64 selinux-policy-3.13.1-6.el7.noarch selinux-policy-devel-3.13.1-6.el7.noarch selinux-policy-doc-3.13.1-6.el7.noarch selinux-policy-minimum-3.13.1-6.el7.noarch selinux-policy-mls-3.13.1-6.el7.noarch selinux-policy-sandbox-3.13.1-6.el7.noarch selinux-policy-targeted-3.13.1-6.el7.noarch How reproducible: always Steps to Reproduce: 1. get a RHEL-7 machine where targeted policy is active 2. service dhcrelay start 3. search for AVCs Actual results (enforcing mode): ---- type=SYSCALL msg=audit(10/17/2014 22:28:19.451:479) : arch=x86_64 syscall=prctl success=no exit=-1(Operation not permitted) a0=PR_CAPBSET_DROP a1=chown a2=0x0 a3=0x0 items=0 ppid=1 pid=12313 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=dhcrelay exe=/usr/sbin/dhcrelay subj=system_u:system_r:dhcpd_t:s0 key=(null) type=AVC msg=audit(10/17/2014 22:28:19.451:479) : avc: denied { setpcap } for pid=12313 comm=dhcrelay capability=setpcap scontext=system_u:system_r:dhcpd_t:s0 tcontext=system_u:system_r:dhcpd_t:s0 tclass=capability ---- Actual results (permissive mode): ---- type=SYSCALL msg=audit(10/17/2014 22:22:39.615:444) : arch=x86_64 syscall=prctl success=yes exit=0 a0=PR_CAPBSET_DROP a1=chown a2=0x0 a3=0x0 items=0 ppid=1 pid=7787 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=dhcrelay exe=/usr/sbin/dhcrelay subj=system_u:system_r:dhcpd_t:s0 key=(null) type=AVC msg=audit(10/17/2014 22:22:39.615:444) : avc: denied { setpcap } for pid=7787 comm=dhcrelay capability=setpcap scontext=system_u:system_r:dhcpd_t:s0 tcontext=system_u:system_r:dhcpd_t:s0 tclass=capability ---- Expected results: * no AVCs