Bug 2248488
| Summary: | Missing rules for `sandbox -t sandbox_web_t -X firefox` | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Petr Lautrbach <plautrba> |
| Component: | selinux-policy | Assignee: | Zdenek Pytela <zpytela> |
| Status: | CLOSED ERRATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | high | Docs Contact: | |
| Priority: | medium | ||
| Version: | 39 | CC: | dwalsh, lvrabec, mmalik, nknazeko, omosnacek, pkoncity, vmojzis, zpytela |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | selinux-policy-39.2-1.fc39 | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2023-11-21 02:49:03 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
@plautrba Can you show me all denials? One of the permission groups should already be allowed:
f39# rpm -q selinux-policy
selinux-policy-39.1-1.fc39.noarch
f39# sesearch -A -s sandbox_xserver_t -t xserver_tmpfs_t -c file -p map,write
allow domain file_type:file map; [ domain_can_mmap_files ]:True
allow sandbox_xserver_t xserver_tmpfs_t:file { map open write };
I've update the PR. Note the map permission is allowed only when xserver_clients_write_xshm boolean is on. You can try the builds in the PR, but I will create a new rawhide build soon if there are no objections. FEDORA-2023-a2dacfbdcb has been submitted as an update to Fedora 39. https://bodhi.fedoraproject.org/updates/FEDORA-2023-a2dacfbdcb FEDORA-2023-a2dacfbdcb has been pushed to the Fedora 39 testing repository. Soon you'll be able to install the update with the following command: `sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2023-a2dacfbdcb` You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2023-a2dacfbdcb See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates. FEDORA-2023-a2dacfbdcb has been pushed to the Fedora 39 stable repository. If problem still persists, please make note of it in this bug report. The needinfo request[s] on this closed bug have been removed as they have been unresolved for 120 days |
The following command fails in enforcing [user@P1 ~]$ sandbox -t sandbox_web_t -X firefox It works with the following module [root@P1 ~]# cat sandbox-wayland.cil (allow sandbox_xserver_t xserver_tmpfs_t (file (map write))) (allow sandbox_web_client_t self (user_namespace (create))) [root@P1 ~]# semodule -r sandbox-wayland audit events generated in permissive and analyzed by audit2why: [root@P1 ~]# ausearch -m avc -ts 11:15:36 | audit2why type=AVC msg=audit(1699352139.469:3242): avc: denied { write } for pid=481494 comm="Xephyr" path=2F6D656D66643A786F7267202864656C6574656429 dev="tmpfs" ino=93765 scontext=unconfined_u:unconfined_r:sandbox_xserver_t:s0:c10,c580 tcontext=unconfined_u:object_r:xserver_tmpfs_t:s0 tclass=file permissive=1 Was caused by: The boolean xserver_clients_write_xshm was set incorrectly. Description: Allows clients to write to the X server shared memory segments. Allow access by executing: # setsebool -P xserver_clients_write_xshm 1 type=AVC msg=audit(1699352139.469:3243): avc: denied { map } for pid=481494 comm="Xephyr" path=2F6D656D66643A786F7267202864656C6574656429 dev="tmpfs" ino=93765 scontext=unconfined_u:unconfined_r:sandbox_xserver_t:s0:c10,c580 tcontext=unconfined_u:object_r:xserver_tmpfs_t:s0 tclass=file permissive=1 Was caused by: The boolean domain_can_mmap_files was set incorrectly. Description: Allow any process to mmap any file on system with attribute file_type. Allow access by executing: # setsebool -P domain_can_mmap_files 1 type=AVC msg=audit(1699352139.561:3244): avc: denied { watch } for pid=481505 comm="dbus-daemon" path="/etc/dbus-1/session.d" dev="dm-1" ino=17110157 scontext=unconfined_u:unconfined_r:sandbox_web_client_t:s0:c10,c580 tcontext=system_u:object_r:dbusd_etc_t:s0 tclass=dir permissive=1 Was caused by: Missing type enforcement (TE) allow rule. You can use audit2allow to generate a loadable module to allow this access. type=AVC msg=audit(1699352139.591:3245): avc: denied { create } for pid=481506 comm="firefox" scontext=unconfined_u:unconfined_r:sandbox_web_client_t:s0:c10,c580 tcontext=unconfined_u:unconfined_r:sandbox_web_client_t:s0:c10,c580 tclass=user_namespace permissive=1 Was caused by: Missing type enforcement (TE) allow rule. You can use audit2allow to generate a loadable module to allow this access. type=AVC msg=audit(1699352140.404:3253): avc: denied { create } for pid=481506 comm=495043204C61756E6368 scontext=unconfined_u:unconfined_r:sandbox_web_client_t:s0:c10,c580 tcontext=unconfined_u:unconfined_r:sandbox_web_client_t:s0:c10,c580 tclass=user_namespace permissive=1 Was caused by: Missing type enforcement (TE) allow rule. You can use audit2allow to generate a loadable module to allow this access. type=AVC msg=audit(1699352146.594:3255): avc: denied { write } for pid=481494 comm="Xephyr" path=2F6D656D66643A786F7267202864656C6574656429 dev="tmpfs" ino=92915 scontext=unconfined_u:unconfined_r:sandbox_xserver_t:s0:c10,c580 tcontext=unconfined_u:object_r:xserver_tmpfs_t:s0 tclass=file permissive=1 Was caused by: The boolean xserver_clients_write_xshm was set incorrectly. Description: Allows clients to write to the X server shared memory segments. Allow access by executing: # setsebool -P xserver_clients_write_xshm 1 type=AVC msg=audit(1699352146.594:3256): avc: denied { map } for pid=481494 comm="Xephyr" path=2F6D656D66643A786F7267202864656C6574656429 dev="tmpfs" ino=92915 scontext=unconfined_u:unconfined_r:sandbox_xserver_t:s0:c10,c580 tcontext=unconfined_u:object_r:xserver_tmpfs_t:s0 tclass=file permissive=1 Was caused by: The boolean domain_can_mmap_files was set incorrectly. Description: Allow any process to mmap any file on system with attribute file_type. Allow access by executing: # setsebool -P domain_can_mmap_files 1 Reproducible: Always Steps to Reproduce: 1. sandbox -t sandbox_web_t -X firefox 2. 3.