Bug 1571591
| Summary: | sysadm_u cannot work with SCTP sockets | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Milos Malik <mmalik> |
| Component: | selinux-policy | Assignee: | Lukas Vrabec <lvrabec> |
| Status: | CLOSED ERRATA | QA Contact: | Milos Malik <mmalik> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 7.5 | CC: | lvrabec, mgrepl, mmalik, plautrba, ssekidde |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | selinux-policy-3.13.1-205.el7 | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2018-10-30 10:03:16 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: | |||
# rpm -qa selinux\*
selinux-policy-devel-3.13.1-204.el7.noarch
selinux-policy-doc-3.13.1-204.el7.noarch
selinux-policy-mls-3.13.1-204.el7.noarch
selinux-policy-targeted-3.13.1-204.el7.noarch
selinux-policy-3.13.1-204.el7.noarch
selinux-policy-sandbox-3.13.1-204.el7.noarch
selinux-policy-minimum-3.13.1-204.el7.noarch
# ausearch -m avc -m user_avc -m selinux_err -m user_selinux_err -i -ts recent
----
type=PROCTITLE msg=audit(06/26/2018 11:08:00.149:133) : proctitle=checksctp
type=SYSCALL msg=audit(06/26/2018 11:08:00.149:133) : arch=x86_64 syscall=socket success=no exit=EACCES(Permission denied) a0=inet a1=SOCK_STREAM a2=sctp a3=0x7ffe6f394560 items=0 ppid=1498 pid=1545 auid=sysadm-user uid=sysadm-user gid=sysadm-user euid=sysadm-user suid=sysadm-user fsuid=sysadm-user egid=sysadm-user sgid=sysadm-user fsgid=sysadm-user tty=tty1 ses=3 comm=checksctp exe=/usr/bin/checksctp subj=sysadm_u:sysadm_r:sysadm_t:s0-s0:c0.c1023 key=(null)
type=AVC msg=audit(06/26/2018 11:08:00.149:133) : avc: denied { create } for pid=1545 comm=checksctp scontext=sysadm_u:sysadm_r:sysadm_t:s0-s0:c0.c1023 tcontext=sysadm_u:sysadm_r:sysadm_t:s0-s0:c0.c1023 tclass=sctp_socket permissive=0
----
The issue is not fixed:
# sesearch -s sysadm_t -t sysadm_t -c sctp_socket -A -C -D
Found 3 semantic av rules:
allow sysadm_t domain : sctp_socket getattr ;
dontaudit sysadm_t domain : sctp_socket getattr ;
dontaudit domain domain : sctp_socket { read write } ;
#
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 only confined user that should be able to work with SCTP sockets is sysadm_u Version-Release number of selected component (if applicable): kernel-3.10.0-862.el7.x86_64 kernel-debug-devel-3.10.0-862.el7.x86_64 kernel-headers-3.10.0-862.el7.x86_64 kernel-tools-3.10.0-862.el7.x86_64 kernel-tools-libs-3.10.0-862.el7.x86_64 lksctp-tools-1.0.17-2.el7.x86_64 lksctp-tools-devel-1.0.17-2.el7.x86_64 selinux-policy-3.13.1-192.el7.noarch selinux-policy-devel-3.13.1-192.el7.noarch selinux-policy-targeted-3.13.1-192.el7.noarch How reproducible: * always Steps to Reproduce: 1. get a RHEL-7.5 machine (targeted policy is active) 2. create a sysadm_u user (useradd -Z sysadm_u ...) 3. log in as the user via ssh 4. run checksctp tool Actual results (enforcing mode): ---- type=PROCTITLE msg=audit(04/25/2018 03:36:27.694:445) : proctitle=/usr/bin/checksctp type=SYSCALL msg=audit(04/25/2018 03:36:27.694:445) : arch=x86_64 syscall=socket success=no exit=EACCES(Permission denied) a0=inet a1=SOCK_STREAM a2=sctp a3=0x7ffe8aab9460 items=0 ppid=15267 pid=15268 auid=unknown(1000) uid=unknown(1000) gid=unknown(1000) euid=unknown(1000) suid=unknown(1000) fsuid=unknown(1000) egid=unknown(1000) sgid=unknown(1000) fsgid=unknown(1000) tty=pts2 ses=8 comm=checksctp exe=/usr/bin/checksctp subj=sysadm_u:sysadm_r:sysadm_t:s0-s0:c0.c1023 key=(null) type=AVC msg=audit(04/25/2018 03:36:27.694:445) : avc: denied { create } for pid=15268 comm=checksctp scontext=sysadm_u:sysadm_r:sysadm_t:s0-s0:c0.c1023 tcontext=sysadm_u:sysadm_r:sysadm_t:s0-s0:c0.c1023 tclass=rawip_socket ---- Expected results: * no SELinux denials