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Bug 2124943 - SELinux prevents the proftpd service from mmap-ing the /run/proftpd/proftpd.delay file
Summary: SELinux prevents the proftpd service from mmap-ing the /run/proftpd/proftpd.d...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: selinux-policy
Version: 9.1
Hardware: All
OS: Linux
medium
unspecified
Target Milestone: rc
: ---
Assignee: Nikola Knazekova
QA Contact: Milos Malik
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2022-09-07 14:11 UTC by Ondrej Mejzlik
Modified: 2023-05-09 10:20 UTC (History)
3 users (show)

Fixed In Version: selinux-policy-34.1.44-1.el9
Doc Type: Bug Fix
Doc Text:
Cause: SELinux prevents the proftpd service from mmap-ing the /run/proftpd/proftpd.delay file Consequence: AVC denial for proftpd found in tier testing. Fix: Allow ftpd map ftpd_var_run files Result: No AVC
Clone Of:
Environment:
Last Closed: 2023-05-09 08:16:34 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker RHELPLAN-133450 0 None None None 2022-09-07 14:21:24 UTC
Red Hat Product Errata RHBA-2023:2483 0 None None None 2023-05-09 08:16:49 UTC

Comment 1 Milos Malik 2022-10-11 13:07:47 UTC 
Caught in enforcing mode:
----
type=PROCTITLE msg=audit(10/11/2022 15:02:41.403:406) : proctitle=/usr/sbin/proftpd --configtest 
type=MMAP msg=audit(10/11/2022 15:02:41.403:406) : fd=5 flags=MAP_SHARED 
type=SYSCALL msg=audit(10/11/2022 15:02:41.403:406) : arch=x86_64 syscall=mmap success=no exit=EACCES(Permission denied) a0=0x0 a1=0x3140 a2=PROT_READ|PROT_WRITE a3=MAP_SHARED items=0 ppid=1 pid=4508 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=proftpd exe=/usr/sbin/proftpd subj=system_u:system_r:ftpd_t:s0-s0:c0.c1023 key=(null) 
type=AVC msg=audit(10/11/2022 15:02:41.403:406) : avc:  denied  { map } for  pid=4508 comm=proftpd path=/run/proftpd/proftpd.delay dev="tmpfs" ino=1972 scontext=system_u:system_r:ftpd_t:s0-s0:c0.c1023 tcontext=system_u:object_r:ftpd_var_run_t:s0 tclass=file permissive=0 
----
type=PROCTITLE msg=audit(10/11/2022 15:02:41.426:409) : proctitle=/usr/sbin/proftpd --nodaemon 
type=MMAP msg=audit(10/11/2022 15:02:41.426:409) : fd=5 flags=MAP_SHARED 
type=SYSCALL msg=audit(10/11/2022 15:02:41.426:409) : arch=x86_64 syscall=mmap success=no exit=EACCES(Permission denied) a0=0x0 a1=0x3140 a2=PROT_READ|PROT_WRITE a3=MAP_SHARED items=0 ppid=1 pid=4509 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=proftpd exe=/usr/sbin/proftpd subj=system_u:system_r:ftpd_t:s0-s0:c0.c1023 key=(null) 
type=AVC msg=audit(10/11/2022 15:02:41.426:409) : avc:  denied  { map } for  pid=4509 comm=proftpd path=/run/proftpd/proftpd.delay dev="tmpfs" ino=1972 scontext=system_u:system_r:ftpd_t:s0-s0:c0.c1023 tcontext=system_u:object_r:ftpd_var_run_t:s0 tclass=file permissive=0 
----

# journalctl -u proftpd -l --no-pager
Oct 11 15:02:41 localhost.localdomain systemd[1]: Starting ProFTPD FTP Server...
Oct 11 15:02:41 localhost.localdomain proftpd[4508]: Checking syntax of configuration file
Oct 11 15:02:41 localhost.localdomain proftpd[4508]: daemon[4508] 127.0.0.1: mod_delay/0.8: error mapping DelayTable '/run/proftpd/proftpd.delay' into memory: Permission denied
Oct 11 15:02:41 localhost.localdomain systemd[1]: Started ProFTPD FTP Server.
Oct 11 15:02:41 localhost.localdomain proftpd[4509]: daemon[4509] 127.0.0.1: mod_delay/0.8: error mapping DelayTable '/run/proftpd/proftpd.delay' into memory: Permission denied
Oct 11 15:02:41 localhost.localdomain proftpd[4509]: daemon[4509] 127.0.0.1: ProFTPD 1.3.8rc4 (devel) (built Thu Aug 4 2022 00:00:00 UTC) standalone mode STARTUP
# ls -ilZ /run/proftpd/proftpd.delay 
1972 -rw-r--r--. 1 root root system_u:object_r:ftpd_var_run_t:s0 12608 Oct 11 15:01 /run/proftpd/proftpd.delay
# rpm -qa selinux\* proftp\* | sort
proftpd-1.3.8-0.4.rc4.el9.x86_64
selinux-policy-34.1.43-1.el9.noarch
selinux-policy-devel-34.1.43-1.el9.noarch
selinux-policy-doc-34.1.43-1.el9.noarch
selinux-policy-mls-34.1.43-1.el9.noarch
selinux-policy-targeted-34.1.43-1.el9.noarch
# rpm -qla proftp\* | grep -i delay
/usr/share/doc/proftpd/modules/mod_delay.html
#
Comment 16 errata-xmlrpc 2023-05-09 08:16:34 UTC 
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 (selinux-policy bug fix and enhancement update), 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-2023:2483
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