Bug 983920
| Summary: | MLS: screen cannot be used for staff_u user in sysadm_r | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Miroslav Vadkerti <mvadkert> |
| Component: | selinux-policy | Assignee: | Miroslav Grepl <mgrepl> |
| Status: | CLOSED CURRENTRELEASE | QA Contact: | Miroslav Vadkerti <mvadkert> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 7.0 | CC: | jjaburek, mgrepl, mvadkert, omoris, svenkatr |
| Target Milestone: | beta | Keywords: | Regression |
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2013-10-03 14:49:05 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: | |||
| Bug Depends On: | |||
| Bug Blocks: | 893599 | ||
This seems to be selinux issue. Mirek. are you still getting it? Sorry for the late answer. I cannot see this with latest stack, thus closing as current release. # getenforce Enforcing # rpm -q selinux-policy screen selinux-policy-3.12.1-84.el7.noarch screen-4.1.0-0.17.20120314git3c2946.el7.x86_64 # id -Z staff_u:sysadm_r:sysadm_t:SystemLow-SystemHigh # screen |
Description of problem: In RHEL7 with MLS under staff_u user in sysadm_r role I cannot use screen because of AVC below. [root/sysadm_r/s0@cc-toe2 ~]# getenforce Enforcing [root/sysadm_r/s0@cc-toe2 ~]# id -Z staff_u:sysadm_r:sysadm_t:s0-s15:c0.c1023 [root/sysadm_r/s0@cc-toe2 ~]# screen Cannot open your terminal '/dev/pts/4' - please check. [root/sysadm_r/s0@cc-toe2 ~]# ausearch -ts 11:40:13 -m avc -sv no -c screen ---- time->Fri Jul 12 11:40:55 2013 type=SYSCALL msg=audit(1373622055.681:20662): arch=c000003e syscall=2 success=no exit=-13 a0=7f92c30b543b a1=80000 a2=1b6 a3=0 items=0 ppid=1940 pid=2278 auid=995 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=84 sgid=84 fsgid=84 ses=6 tty=pts4 comm="screen" exe="/usr/bin/screen" subj=staff_u:sysadm_r:sysadm_screen_t:s0-s15:c0.c1023 key=(null) type=AVC msg=audit(1373622055.681:20662): avc: denied { dac_read_search } for pid=2278 comm="screen" capability=2 scontext=staff_u:sysadm_r:sysadm_screen_t:s0-s15:c0.c1023 tcontext=staff_u:sysadm_r:sysadm_screen_t:s0-s15:c0.c1023 tclass=capability type=AVC msg=audit(1373622055.681:20662): avc: denied { dac_override } for pid=2278 comm="screen" capability=1 scontext=staff_u:sysadm_r:sysadm_screen_t:s0-s15:c0.c1023 tcontext=staff_u:sysadm_r:sysadm_screen_t:s0-s15:c0.c1023 tclass=capability ---- time->Fri Jul 12 11:40:55 2013 type=SYSCALL msg=audit(1373622055.682:20663): arch=c000003e syscall=2 success=no exit=-13 a0=7f92caf52210 a1=802 a2=0 a3=0 items=0 ppid=1940 pid=2278 auid=995 uid=0 gid=84 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 ses=6 tty=pts4 comm="screen" exe="/usr/bin/screen" subj=staff_u:sysadm_r:sysadm_screen_t:s0-s15:c0.c1023 key=(null) type=AVC msg=audit(1373622055.682:20663): avc: denied { dac_override } for pid=2278 comm="screen" capability=1 scontext=staff_u:sysadm_r:sysadm_screen_t:s0-s15:c0.c1023 tcontext=staff_u:sysadm_r:sysadm_screen_t:s0-s15:c0.c1023 tclass=capability Version-Release number of selected component (if applicable): selinux-policy-3.12.1-59.el7 How reproducible: 100% Steps to Reproduce: see description Actual results: screen does not work Expected results: screen works as in RHEL6 - regression