Bug 2252484
| Summary: | avc denials policykit_auth_t policykit_t spamd_update_t Fedora 39 | ||||||
|---|---|---|---|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Edgar Hoch <edgar.hoch> | ||||
| Component: | selinux-policy | Assignee: | Zdenek Pytela <zpytela> | ||||
| Status: | CLOSED ERRATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> | ||||
| Severity: | medium | Docs Contact: | |||||
| Priority: | medium | ||||||
| Version: | 39 | CC: | dwalsh, loye.young, lvrabec, mmalik, nknazeko, omosnacek, pkoncity, vmojzis, zpytela | ||||
| Target Milestone: | --- | ||||||
| Target Release: | --- | ||||||
| Hardware: | x86_64 | ||||||
| OS: | Linux | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | selinux-policy-39.4-1.fc39 | Doc Type: | If docs needed, set a value | ||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2024-01-30 04:22:07 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: | |||||||
| Attachments: |
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Created attachment 2002411 [details]
Output of "ausearch --raw -m avc" in permissive mode
Edgar, Some of the reported denials have been addressed, but I don't have enough information about the sys_ptrace, do you have a direct reproducer, or can you collect denials with full auditing enabled? https://fedoraproject.org/wiki/SELinux/Debugging#Enable_full_auditing Sorry for the delay.
I found that the denials was reported every day short after midnight. I checked cron and systemd and found that services logrotate.service, sa-update.service and unbound-anchor.service are timed for midnight every day.
For logrotate.service, one file contains "pgrep", but I don't think that this caused the denial message, because it doesn't contain "spamd".
/etc/logrotate.d/glusterfs: /usr/bin/killall -HUP `pgrep -f "glusterfs.*snapd"` > /dev/null 2>&1 || true
But sa-update.service calls /usr/share/spamassassin/sa-update.cron, which contains the following lines:
for daemon in mimedefang spamd amavisd spampd; do
/usr/bin/pgrep -f $daemon >& /dev/null
[ $? -eq 0 ] && SAUPDATE=yes
done
So I think the message is caused by package spamassassin-4.0.0-6.fc39.x86_64 .
type=AVC msg=audit(1702854015.017:42859): avc: denied { sys_ptrace } for pid=1077477 comm="pgrep" capability=19 scontext=system_u:system_r:spamd_update_t:s0 tcontext=system_u:system_r:spamd_update_t:s0 tclass=cap_userns permissive=1
I hope this helps.
It's helpful, thank you, I haven't reproduced it yet. FEDORA-2024-334b3be641 has been submitted as an update to Fedora 39. https://bodhi.fedoraproject.org/updates/FEDORA-2024-334b3be641 FEDORA-2024-334b3be641 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-2024-334b3be641` You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2024-334b3be641 See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates. *** Bug 2260636 has been marked as a duplicate of this bug. *** FEDORA-2024-334b3be641 has been pushed to the Fedora 39 stable repository. If problem still persists, please make note of it in this bug report. |
After installing Fedora 39 using my kickstart file with many packages (17637 currently) I got some avc denials. ausearch --raw -m avc | audit2allow results in #============= policykit_auth_t ============== allow policykit_auth_t proc_net_t:lnk_file read; allow policykit_auth_t sysctl_net_t:dir search; allow policykit_auth_t sysctl_net_t:file { getattr open read }; #============= policykit_t ============== allow policykit_t proc_net_t:lnk_file read; allow policykit_t sysctl_net_t:dir search; allow policykit_t sysctl_net_t:file { getattr open read }; #============= spamd_update_t ============== allow spamd_update_t self:cap_userns sys_ptrace; allow spamd_update_t sysfs_t:dir read; allow spamd_update_t sysfs_t:file read; Reproducible: Always