Bug 1808527 - SELinux prevents usbguard from logging via Linux audit subsystem
Summary: SELinux prevents usbguard from logging via Linux audit subsystem
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: usbguard
Version: 32
Hardware: x86_64
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Daniel Kopeček
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2020-02-28 18:07 UTC by Milos Malik
Modified: 2020-07-03 01:37 UTC (History)
2 users (show)

Fixed In Version: usbguard-0.7.8-1.fc32 usbguard-0.7.8-1.fc31
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2020-07-03 01:18:25 UTC
Type: Bug
Embargoed:


Attachments (Terms of Use)

Description Milos Malik 2020-02-28 18:07:55 UTC
Description of problem:

Version-Release number of selected component (if applicable):
selinux-policy-3.14.5-28.fc32.noarch
selinux-policy-targeted-3.14.5-28.fc32.noarch
usbguard-0.7.6-8.fc32.x86_64
usbguard-selinux-0.7.6-8.fc32.noarch

How reproducible:
 * always

Steps to Reproduce:
1. get a Fedora 32 machine (targeted policy is active)
2. set 'AuditBackend=LinuxAudit' in /etc/usbguard/usbguard-daemon.conf
3. restart the usbguard service
4. search for SELinux denials

Actual results (enforcing mode):
----
type=PROCTITLE msg=audit(02/28/2020 13:04:25.622:475) : proctitle=/usr/sbin/usbguard-daemon -k -c /etc/usbguard/usbguard-daemon.conf 
type=SYSCALL msg=audit(02/28/2020 13:04:25.622:475) : arch=x86_64 syscall=socket success=no exit=EACCES(Permission denied) a0=netlink a1=SOCK_RAW a2=igp a3=0x20 items=0 ppid=1 pid=2181 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=usbguard-daemon exe=/usr/sbin/usbguard-daemon subj=system_u:system_r:usbguard_t:s0 key=(null) 
type=AVC msg=audit(02/28/2020 13:04:25.622:475) : avc:  denied  { create } for  pid=2181 comm=usbguard-daemon scontext=system_u:system_r:usbguard_t:s0 tcontext=system_u:system_r:usbguard_t:s0 tclass=netlink_audit_socket permissive=0 
----

Expected results:
 * no SELinux denials

Comment 1 Milos Malik 2020-02-28 18:09:43 UTC
----
type=PROCTITLE msg=audit(02/28/2020 13:08:18.364:499) : proctitle=/usr/sbin/usbguard-daemon -k -c /etc/usbguard/usbguard-daemon.conf 
type=SYSCALL msg=audit(02/28/2020 13:08:18.364:499) : arch=x86_64 syscall=socket success=yes exit=9 a0=netlink a1=SOCK_RAW a2=igp a3=0x20 items=0 ppid=1 pid=2217 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=usbguard-daemon exe=/usr/sbin/usbguard-daemon subj=system_u:system_r:usbguard_t:s0 key=(null) 
type=AVC msg=audit(02/28/2020 13:08:18.364:499) : avc:  denied  { create } for  pid=2217 comm=usbguard-daemon scontext=system_u:system_r:usbguard_t:s0 tcontext=system_u:system_r:usbguard_t:s0 tclass=netlink_audit_socket permissive=1 
----
type=PROCTITLE msg=audit(02/28/2020 13:08:18.366:500) : proctitle=/usr/sbin/usbguard-daemon -k -c /etc/usbguard/usbguard-daemon.conf 
type=SOCKADDR msg=audit(02/28/2020 13:08:18.366:500) : saddr={ saddr_fam=netlink nlnk-fam=16 nlnk-pid=0 } 
type=SYSCALL msg=audit(02/28/2020 13:08:18.366:500) : arch=x86_64 syscall=sendto success=yes exit=652 a0=0x9 a1=0x7fff6cca1a80 a2=0x28c a3=0x0 items=0 ppid=1 pid=2217 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=usbguard-daemon exe=/usr/sbin/usbguard-daemon subj=system_u:system_r:usbguard_t:s0 key=(null) 
type=AVC msg=audit(02/28/2020 13:08:18.366:500) : avc:  denied  { nlmsg_relay } for  pid=2217 comm=usbguard-daemon scontext=system_u:system_r:usbguard_t:s0 tcontext=system_u:system_r:usbguard_t:s0 tclass=netlink_audit_socket permissive=1 
----

Comment 2 Fedora Update System 2020-06-24 17:46:11 UTC
FEDORA-2020-f502be60a4 has been submitted as an update to Fedora 32. https://bodhi.fedoraproject.org/updates/FEDORA-2020-f502be60a4

Comment 3 Fedora Update System 2020-06-24 17:46:30 UTC
FEDORA-2020-c30d6afc1c has been submitted as an update to Fedora 31. https://bodhi.fedoraproject.org/updates/FEDORA-2020-c30d6afc1c

Comment 4 Fedora Update System 2020-06-25 00:58:35 UTC
FEDORA-2020-c30d6afc1c has been pushed to the Fedora 31 testing repository.
In short time you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --advisory=FEDORA-2020-c30d6afc1c`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2020-c30d6afc1c

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 5 Fedora Update System 2020-06-25 01:04:02 UTC
FEDORA-2020-f502be60a4 has been pushed to the Fedora 32 testing repository.
In short time you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --advisory=FEDORA-2020-f502be60a4`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2020-f502be60a4

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 6 Fedora Update System 2020-07-03 01:18:25 UTC
FEDORA-2020-f502be60a4 has been pushed to the Fedora 32 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 7 Fedora Update System 2020-07-03 01:37:37 UTC
FEDORA-2020-c30d6afc1c has been pushed to the Fedora 31 stable repository.
If problem still persists, please make note of it in this bug report.


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