diff options
| author | Guilhem Moulin <guilhem@fripost.org> | 2020-05-20 15:46:27 +0200 |
|---|---|---|
| committer | Guilhem Moulin <guilhem@fripost.org> | 2020-05-21 03:40:53 +0200 |
| commit | 6d1daa0424c168eae4bfa9f6772add3f77ec506f (patch) | |
| tree | a45e83f4fefa0a3976c534078d26d3ff003e9935 /roles/MSA/files | |
| parent | 5118f8d3394579a245b355c863c69410fe92e26e (diff) | |
postfix-sender-login: Better hardening.
Run as a dedicated user, not ‘postfix’.
Diffstat (limited to 'roles/MSA/files')
| -rw-r--r-- | roles/MSA/files/etc/systemd/system/postfix-sender-login.service | 6 | ||||
| -rwxr-xr-x | roles/MSA/files/usr/local/bin/postfix-sender-login.pl | 13 |
2 files changed, 9 insertions, 10 deletions
diff --git a/roles/MSA/files/etc/systemd/system/postfix-sender-login.service b/roles/MSA/files/etc/systemd/system/postfix-sender-login.service index f5e6d89..d652f75 100644 --- a/roles/MSA/files/etc/systemd/system/postfix-sender-login.service +++ b/roles/MSA/files/etc/systemd/system/postfix-sender-login.service @@ -4,8 +4,7 @@ After=mail-transport-agent.target Requires=postfix-sender-login.socket [Service] -User=postfix -Group=postfix +User=_postfix-sender-login StandardInput=null SyslogFacility=mail ExecStart=/usr/local/bin/postfix-sender-login.pl @@ -13,10 +12,9 @@ ExecStart=/usr/local/bin/postfix-sender-login.pl # Hardening NoNewPrivileges=yes PrivateDevices=yes +PrivateNetwork=yes ProtectHome=yes ProtectSystem=strict -PrivateDevices=yes -PrivateNetwork=yes ProtectControlGroups=yes ProtectKernelModules=yes ProtectKernelTunables=yes diff --git a/roles/MSA/files/usr/local/bin/postfix-sender-login.pl b/roles/MSA/files/usr/local/bin/postfix-sender-login.pl index 374cc70..a37f872 100755 --- a/roles/MSA/files/usr/local/bin/postfix-sender-login.pl +++ b/roles/MSA/files/usr/local/bin/postfix-sender-login.pl @@ -3,7 +3,7 @@ #---------------------------------------------------------------------- # socketmap lookup table returning the SASL login name(s) owning a given # sender address -# Copyright © 2017 Guilhem Moulin <guilhem@fripost.org> +# Copyright © 2017,2020 Guilhem Moulin <guilhem@fripost.org> # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by @@ -33,12 +33,13 @@ use Authen::SASL (); $ENV{PATH} = join ':', qw{/usr/bin /bin}; delete @ENV{qw/IFS CDPATH ENV BASH_ENV/}; -my $nProc = 2; # number of pre-forked servers -my $POSTMASTER = 'postmaster@fripost.org'; # returned for forbidden envelope sender addresses +my $nProc = 2; # number of pre-forked servers +my $maxRequests = 32; # maximum number of requests per worker +my $POSTMASTER = 'postmaster@fripost.org'; # returned for forbidden envelope sender addresses -my $BASEDN = 'ou=virtual,dc=fripost,dc=org'; +my $BASEDN = "ou=virtual,dc=fripost,dc=org"; my $BUFSIZE = 65536; # try to read that many bytes at the time -my $LDAPI = 'ldapi://%2Fvar%2Fspool%2Fpostfix-msa%2Fprivate%2Fldapi/'; +my $LDAPI = "ldapi://"; sub server(); @@ -66,7 +67,7 @@ exit $?; ############################################################################# sub server() { - for (my $n = 0; $n < 32; $n++) { + for (my $n = 0; $n < $maxRequests; $n++) { accept(my $conn, $S) or do { next if $! == EINTR; die "accept: $!"; |