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Bug 1822256
| Summary: | SELinux is preventing grub2-set-bootf from 'write' accesses on the directory /boot/grub2. | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Andrew Stitcher <astitcher> |
| Component: | selinux-policy | Assignee: | Zdenek Pytela <zpytela> |
| Status: | CLOSED EOL | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 30 | CC: | dwalsh, grepl.miroslav, lvrabec, plautrba, vmojzis, zpytela |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Unspecified | ||
| Whiteboard: | abrt_hash:3092cd349c84ac5ceca25440c6b750ba2b16494fba392c2d338ede7e88002b22;VARIANT_ID=workstation; | ||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2020-05-26 14:29:36 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: | |||
The following rawhide/base commit needs to be backported:
commit 43a040b61451c4bc7f0cfc0132843621f0359b52
Author: Nikola Knazekova <nknazeko>
Date: Tue Sep 10 18:47:52 2019 +0200
Introduce xdm_manage_bootloader booelan
Created xdm_manage_bootloader boolean to create, read, write, and delete files in the /boot director & DOS filesystem.
Fixed Red Hat Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1750112#
I've submitted a Fedora PR to backport existing commit: https://github.com/fedora-selinux/selinux-policy/pull/346 commit 51eba6d67c2ede38e16fb3c323abf234ccdcb203 (HEAD -> f30, origin/f30)
Author: Nikola Knazekova <nknazeko>
Date: Tue Sep 10 18:47:52 2019 +0200
Introduce xdm_manage_bootloader booelan
Created xdm_manage_bootloader boolean to create, read, write, and delete files in the /boot director & DOS filesystem.
Resolves: rhbz#1822256
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Description of problem: Simple upgrade of my Fedora 30 box. This box has been continuously upgraded for 5 or more years so there may be cruft lying around. SELinux is preventing grub2-set-bootf from 'write' accesses on the directory /boot/grub2. ***** Plugin kernel_modules (91.4 confidence) suggests ******************** If you do not think grub2-set-bootf should try write access on grub2. Then you may be under attack by a hacker, since confined applications should not need this access. Do contact your security administrator and report this issue. ***** Plugin catchall (9.59 confidence) suggests ************************** If you believe that grub2-set-bootf should be allowed write access on the grub2 directory by default. Then you should report this as a bug. You can generate a local policy module to allow this access. Do allow this access for now by executing: # ausearch -c 'grub2-set-bootf' --raw | audit2allow -M my-grub2setbootf # semodule -X 300 -i my-grub2setbootf.pp Additional Information: Source Context system_u:system_r:xdm_t:s0-s0:c0.c1023 Target Context system_u:object_r:boot_t:s0 Target Objects /boot/grub2 [ dir ] Source grub2-set-bootf Source Path grub2-set-bootf Port <Unknown> Host (removed) Source RPM Packages Target RPM Packages grub2-common-2.02-88.fc30.noarch Policy RPM selinux-policy-3.14.3-57.fc30.noarch Selinux Enabled True Policy Type targeted Enforcing Mode Enforcing Host Name (removed) Platform Linux (removed) 5.5.9-100.fc30.x86_64 #1 SMP Thu Mar 12 14:15:32 UTC 2020 x86_64 x86_64 Alert Count 2 First Seen 2020-04-08 10:24:30 EDT Last Seen 2020-04-08 10:24:53 EDT Local ID 510d453a-7fcd-46e5-9973-aa7db603acba Raw Audit Messages type=AVC msg=audit(1586355893.738:357): avc: denied { write } for pid=9180 comm="grub2-set-bootf" name="grub2" dev="dm-3" ino=1316974 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:boot_t:s0 tclass=dir permissive=0 Hash: grub2-set-bootf,xdm_t,boot_t,dir,write Version-Release number of selected component: selinux-policy-3.14.3-57.fc30.noarch Additional info: component: selinux-policy reporter: libreport-2.12.0 hashmarkername: setroubleshoot kernel: 5.5.10-100.fc30.x86_64 type: libreport