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Bug 2066005 - SELinux is preventing /usr/libexec/postfix/lmtp from write access on the sock_file lmtp.
Summary: SELinux is preventing /usr/libexec/postfix/lmtp from write access on the sock...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: selinux-policy
Version: 8.5
Hardware: All
OS: Linux
medium
high
Target Milestone: rc
: 8.7
Assignee: Zdenek Pytela
QA Contact: Amith
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2022-03-19 22:33 UTC by Brian J. Murrell
Modified: 2022-11-08 12:22 UTC (History)
3 users (show)

Fixed In Version: selinux-policy-3.14.3-98.el8
Doc Type: No Doc Update
Doc Text:
Clone Of:
Environment:
Last Closed: 2022-11-08 10:44:11 UTC
Type: Bug
Target Upstream Version:
Embargoed:
pm-rhel: mirror+

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Bugzilla 1807443 1 None None None 2022-03-21 08:33:46 UTC
Red Hat Issue Tracker RHELPLAN-116179 0 None None None 2022-03-19 22:43:53 UTC
Red Hat Product Errata RHBA-2022:7691 0 None None None 2022-11-08 10:45:03 UTC

Description Brian J. Murrell 2022-03-19 22:33:35 UTC 
When using the default /run/cyrus/socket/lmtp path for the lmtp socket defined in /etc/cyrus.conf the following AVC is logged.

SELinux is preventing /usr/libexec/postfix/lmtp from write access on the sock_file lmtp.

*****  Plugin catchall (100. confidence) suggests   **************************

If you believe that lmtp should be allowed write access on the lmtp sock_file 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 'lmtp' --raw | audit2allow -M my-lmtp
# semodule -X 300 -i my-lmtp.pp


Additional Information:
Source Context                system_u:system_r:postfix_smtp_t:s0
Target Context                system_u:object_r:cyrus_var_run_t:s0
Target Objects                lmtp [ sock_file ]
Source                        lmtp
Source Path                   /usr/libexec/postfix/lmtp
Port                          <Unknown>
Host                          server.interlinx.bc.ca
Source RPM Packages           postfix-3.5.8-2.el8.x86_64
Target RPM Packages
SELinux Policy RPM            selinux-policy-targeted-3.14.3-80.el8_5.2.noarch
Local Policy RPM              selinux-policy-targeted-3.14.3-80.el8_5.2.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     server.interlinx.bc.ca
Platform                      Linux server.interlinx.bc.ca
                              4.18.0-348.12.2.el8_5.x86_64 #1 SMP Wed Jan 19
                              14:35:04 EST 2022 x86_64 x86_64
Alert Count                   12
First Seen                    2022-02-28 07:25:03 EST
Last Seen                     2022-02-28 07:29:30 EST
Local ID                      51515fa6-d6c9-4bce-9e3f-0cfd714d91e9

Raw Audit Messages
type=AVC msg=audit(1646051370.955:83893): avc:  denied  { write } for  pid=3086610 comm="lmtp" name="lmtp" dev="tmpfs" ino=204371594 scontext=system_u:system_r:postfix_smtp_t:s0 tcontext=system_u:object_r:cyrus_var_run_t:s0 tclass=sock_file permissive=0


type=SYSCALL msg=audit(1646051370.955:83893): arch=x86_64 syscall=connect success=no exit=EACCES a0=11 a1=7ffe7e27ebb0 a2=6e a3=11 items=0 ppid=4904 pid=3086610 auid=4294967295 uid=89 gid=89 euid=89 suid=89 fsuid=89 egid=89 sgid=89 fsgid=89 tty=(none) ses=4294967295 comm=lmtp exe=/usr/libexec/postfix/lmtp subj=system_u:system_r:postfix_smtp_t:s0 key=(null) 

Hash: lmtp,postfix_smtp_t,cyrus_var_run_t,sock_file,write
Comment 1 Zdenek Pytela 2022-03-21 08:33:47 UTC 
Commit to backport:
commit 08def7c154b5be4ce7b11643d71d59fe98ea2bfc
Author: Zdenek Pytela <zpytela>
Date:   Wed Feb 26 20:52:09 2020 +0100

    Allow postfix stream connect to cyrus through runtime socket
Comment 6 errata-xmlrpc 2022-11-08 10:44:11 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-2022:7691
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