From: Chris PeBenito <pebenito@ieee.org>
To: Dominick Grift <dominick.grift@defensec.nl>,
Russell Coker <russell@coker.com.au>
Cc: selinux-refpolicy@vger.kernel.org
Subject: Re: another certbot patch
Date: Tue, 14 Apr 2020 10:54:59 -0400 [thread overview]
Message-ID: <c36a04c9-2f9c-a327-4d9d-afdd471c31af@ieee.org> (raw)
In-Reply-To: <ypjl7dynn4re.fsf@defensec.nl>
On 4/10/20 4:07 AM, Dominick Grift wrote:
> Russell Coker <russell@coker.com.au> writes:
>
>> Signed-off-by: Russell Coker <russell@coker.com.au>
>>
>> I think this addresses all the issues Chris raised.
I don't have any comments beyond Dominick's.
>> Index: refpolicy-2.20200410/policy/modules/services/certbot.fc
>> ===================================================================
>> --- /dev/null
>> +++ refpolicy-2.20200410/policy/modules/services/certbot.fc
>> @@ -0,0 +1,4 @@
>> +/usr/bin/certbot -- gen_context(system_u:object_r:certbot_exec_t,s0)
>> +/usr/bin/letsencrypt -- gen_context(system_u:object_r:certbot_exec_t,s0)
>> +/var/log/letsencrypt(/.*)? gen_context(system_u:object_r:certbot_log_t,s0)
>> +/var/lib/letsencrypt(/.*)? gen_context(system_u:object_r:certbot_lib_t,s0)
>> Index: refpolicy-2.20200410/policy/modules/services/certbot.if
>> ===================================================================
>> --- /dev/null
>> +++ refpolicy-2.20200410/policy/modules/services/certbot.if
>> @@ -0,0 +1,46 @@
>> +## <summary>SSL certificate requesting tool certbot AKA letsencrypt.</summary>
>> +
>> +########################################
>> +## <summary>
>> +## Execute certbot/letsencrypt in the certbot
>> +## domain.
>> +## </summary>
>> +## <param name="domain">
>> +## <summary>
>> +## Domain allowed to transition.
>> +## </summary>
>> +## </param>
>> +#
>> +interface(`certbot_domtrans',`
>> + gen_require(`
>> + type certbot_t, certbot_exec_t;
>> + ')
>> +
>> + domtrans_pattern($1, certbot_exec_t, certbot_t)
>> +')
>> +
>> +########################################
>> +## <summary>
>> +## Execute certbot/letsencrypt in the certbot
>> +## domain, and allow the specified role
>> +## the firstboot domain.
>> +## </summary>
>> +## <param name="role">
>> +## <summary>
>> +## Role allowed access.
>> +## </summary>
>> +## </param>
>> +## <param name="domain">
>> +## <summary>
>> +## Domain allowed to transition.
>> +## </summary>
>> +## </param>
>> +#
>> +interface(`certbot_run',`
>> + gen_require(`
>> + type certbot_t;
>> + ')
>> +
>> + certbot_domtrans($2)
>> + role $1 types certbot_t;
>
> might want to call this: certbot_run(sysadm_r, sysadm_t)
>
>> +')
>> Index: refpolicy-2.20200410/policy/modules/services/certbot.te
>> ===================================================================
>> --- /dev/null
>> +++ refpolicy-2.20200410/policy/modules/services/certbot.te
>> @@ -0,0 +1,99 @@
>> +policy_module(certbot, 1.0.0)
>> +
>> +########################################
>> +#
>> +# Declarations
>> +#
>> +
>> +type certbot_t;
>> +type certbot_exec_t;
>> +init_daemon_domain(certbot_t, certbot_exec_t)
>> +
>> +type certbot_log_t;
>> +logging_log_file(certbot_log_t)
>> +
>> +type certbot_runtime_t alias certbot_var_run_t;
>> +files_pid_file(certbot_runtime_t)
>> +
>> +type certbot_tmp_t;
>> +files_tmp_file(certbot_tmp_t)
>> +
>> +type certbot_tmpfs_t;
>> +files_tmpfs_file(certbot_tmpfs_t)
>> +
>> +type certbot_lib_t alias certbot_var_lib_t;
>> +files_type(certbot_lib_t)
>
> I would have used certbot_state_t here so that "lib" can be used for
> private library types
>
>> +
>> +########################################
>> +#
>> +# Local policy
>> +#
>> +
>> +allow certbot_t self:fifo_file { getattr ioctl read write };
>> +allow certbot_t self:capability { chown dac_override sys_resource };
>> +allow certbot_t self:udp_socket all_udp_socket_perms;
>> +allow certbot_t self:tcp_socket all_tcp_socket_perms;
>> +allow certbot_t self:netlink_route_socket create_netlink_socket_perms;
>> +
>> +files_search_var_lib(certbot_t)
>> +manage_dirs_pattern(certbot_t, certbot_lib_t, certbot_lib_t)
>> +manage_files_pattern(certbot_t, certbot_lib_t, certbot_lib_t)
>> +
>> +manage_files_pattern(certbot_t, certbot_tmp_t, certbot_tmp_t)
>> +files_tmp_filetrans(certbot_t, certbot_tmp_t, { file })
>> +
>> +manage_files_pattern(certbot_t, certbot_tmpfs_t, certbot_tmpfs_t)
>> +fs_tmpfs_filetrans(certbot_t, certbot_tmpfs_t, { file })
>> +
>> +# this is for certbot to have write-exec memory, I know it is bad
>> +# https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=913544
>> +# the Debian bug report has background about python-acme and python3-openssl
>> +allow certbot_t self:process execmem;
>> +allow certbot_t certbot_tmp_t:file { map execute };
>> +allow certbot_t certbot_tmpfs_t:file { map execute };
>> +allow certbot_t certbot_runtime_t:file { map execute };
>> +
>> +logging_search_logs(certbot_t)
>> +allow certbot_t certbot_log_t:dir manage_dir_perms;
>> +allow certbot_t certbot_log_t:file manage_file_perms;
>> +
>> +manage_files_pattern(certbot_t, certbot_runtime_t, certbot_runtime_t)
>> +files_pid_filetrans(certbot_t, certbot_runtime_t, file)
>> +
>> +kernel_search_fs_sysctls(certbot_t)
>> +
>> +corecmd_exec_bin(certbot_t)
>> +corecmd_list_bin(certbot_t)
>> +corecmd_mmap_bin_files(certbot_t)
>
> redundant: exec implies mmap
>
>> +
>> +corenet_tcp_bind_generic_node(certbot_t)
>> +corenet_tcp_connect_http_port(certbot_t)
>> +
>> +# bind to http port for standalone mode
>> +corenet_tcp_bind_http_port(certbot_t)
>> +
>> +domain_use_interactive_fds(certbot_t)
>> +files_read_etc_files(certbot_t)
>> +
>> +libs_exec_ldconfig(certbot_t)
>> +# for /usr/lib/gcc/x86_64-linux-gnu/8/collect2
>> +libs_exec_lib_files(certbot_t)
>> +
>> +miscfiles_read_localization(certbot_t)
>> +
>> +miscfiles_read_generic_certs(certbot_t)
>> +miscfiles_manage_generic_tls_privkey_dirs(certbot_t)
>> +miscfiles_manage_generic_tls_privkey_files(certbot_t)
>> +miscfiles_manage_generic_tls_privkey_lnk_files(certbot_t)
>> +
>> +sysnet_read_config(certbot_t)
>> +
>> +userdom_dontaudit_search_user_home_dirs(certbot_t)
>> +userdom_use_user_ptys(certbot_t)
>> +
>> +optional_policy(`
>> + # for writing to webroot
>> + apache_manage_sys_content(certbot_t)
>> +
>> + apache_search_config(certbot_t)
>> +')
>> Index: refpolicy-2.20200410/policy/modules/system/miscfiles.if
>> ===================================================================
>> --- refpolicy-2.20200410.orig/policy/modules/system/miscfiles.if
>> +++ refpolicy-2.20200410/policy/modules/system/miscfiles.if
>> @@ -254,6 +254,26 @@ interface(`miscfiles_manage_generic_tls_
>>
>> ########################################
>> ## <summary>
>> +## Manage generic SSL/TLS private
>> +## keys.
>> +## </summary>
>> +## <param name="domain">
>> +## <summary>
>> +## Domain allowed access.
>> +## </summary>
>> +## </param>
>> +## <rolecap/>
>> +#
>> +interface(`miscfiles_manage_generic_tls_privkey_lnk_files',`
>> + gen_require(`
>> + type tls_privkey_t;
>> + ')
>> +
>> + manage_lnk_files_pattern($1, tls_privkey_t, tls_privkey_t)
>> +')
>> +
>> +########################################
>> +## <summary>
>> ## Read fonts.
>> ## </summary>
>> ## <param name="domain">
>
--
Chris PeBenito
next prev parent reply other threads:[~2020-04-14 15:06 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-10 6:02 another certbot patch Russell Coker
2020-04-10 8:07 ` Dominick Grift
2020-04-14 14:54 ` Chris PeBenito [this message]
2020-05-21 14:50 ` bauen1
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=c36a04c9-2f9c-a327-4d9d-afdd471c31af@ieee.org \
--to=pebenito@ieee.org \
--cc=dominick.grift@defensec.nl \
--cc=russell@coker.com.au \
--cc=selinux-refpolicy@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).