Bug 1600705
| Summary: | SELinux prevents the kprop service from starting | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Patrik Kis <pkis> |
| Component: | selinux-policy | Assignee: | Lukas Vrabec <lvrabec> |
| Status: | CLOSED ERRATA | QA Contact: | Milos Malik <mmalik> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 7.6 | CC: | lmiksik, lvrabec, mgrepl, mmalik, mthacker, plautrba, ssekidde |
| Target Milestone: | rc | Keywords: | Regression |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | selinux-policy-3.13.1-213.el7 | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2018-10-30 10:07:08 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: | |||
Caught in enforcing mode:
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type=PROCTITLE msg=audit(07/12/2018 22:24:56.198:501) : proctitle=/bin/sh /usr/sbin/_kpropd
type=PATH msg=audit(07/12/2018 22:24:56.198:501) : item=0 name=/usr/sbin/kpropd inode=867046 dev=fd:03 mode=file,755 ouid=root ogid=root rdev=00:00 obj=system_u:object_r:kpropd_exec_t:s0 nametype=NORMAL cap_fp=none cap_fi=none cap_fe=0 cap_fver=0
type=CWD msg=audit(07/12/2018 22:24:56.198:501) : cwd=/
type=SYSCALL msg=audit(07/12/2018 22:24:56.198:501) : arch=x86_64 syscall=execve success=no exit=EACCES(Permission denied) a0=0x1d7ca90 a1=0x1d7cc20 a2=0x1d7cd60 a3=0x7ffe07547ee0 items=1 ppid=1 pid=67303 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=_kpropd exe=/usr/bin/bash subj=system_u:system_r:kpropd_t:s0 key=(null)
type=AVC msg=audit(07/12/2018 22:24:56.198:501) : avc: denied { execute_no_trans } for pid=67303 comm=_kpropd path=/usr/sbin/kpropd dev="vda3" ino=867046 scontext=system_u:system_r:kpropd_t:s0 tcontext=system_u:object_r:kpropd_exec_t:s0 tclass=file permissive=0
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Reproducible on both RHEL-7.6 and RHEL-ALT-7.6.
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-2018:3111 |
Description of problem: The policy "allow krb5kdc_t krb5kdc_exec_t : file execute_no_trans ;" was removed from the latest version of selinux-policy. This is a regression. Version-Release number of selected component (if applicable): selinux-policy-3.13.1-207.el7 How reproducible: always Steps to Reproduce: 1. The following step is needed to start the krpopd service # touch /var/kerberos/krb5kdc/kpropd.acl 2. Try to start # systemctl start kprop.service Actual results: # ausearch -m avc -i -ts recent ---- type=PROCTITLE msg=audit(07/12/2018 19:55:51.859:228) : proctitle=/bin/sh /usr/sbin/_kpropd type=SYSCALL msg=audit(07/12/2018 19:55:51.859:228) : arch=x86_64 syscall=execve success=no exit=EACCES(Permission denied) a0=0x1455a30 a1=0x1455bc0 a2=0x1455d00 a3=0x7ffc19390060 items=0 ppid=1 pid=8507 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=_kpropd exe=/usr/bin/bash subj=system_u:system_r:kpropd_t:s0 key=(null) type=AVC msg=audit(07/12/2018 19:55:51.859:228) : avc: denied { execute_no_trans } for pid=8507 comm=_kpropd path=/usr/sbin/kpropd dev="dm-0" ino=1556427 scontext=system_u:system_r:kpropd_t:s0 tcontext=system_u:object_r:kpropd_exec_t:s0 tclass=file permissive=0 Expected results: no AVC denials Additional info: This policy disappeared from the current version: # rpm -q selinux-policy selinux-policy-3.13.1-192.el7.noarch # sesearch -A -C -s krb5kdc_t -t krb5kdc_exec_t -c file Found 1 semantic av rules: allow krb5kdc_t krb5kdc_exec_t : file { ioctl read getattr lock execute execute_no_trans entrypoint open } ;