lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-Id: <20200930094934.32144-1-richard_c_haines@btinternet.com>
Date:   Wed, 30 Sep 2020 10:49:31 +0100
From:   Richard Haines <richard_c_haines@...nternet.com>
To:     selinux@...r.kernel.org, linux-security-module@...r.kernel.org,
        osmocom-net-gprs@...ts.osmocom.org, netdev@...r.kernel.org
Cc:     stephen.smalley.work@...il.com, paul@...l-moore.com,
        pablo@...filter.org, laforge@...monks.org, jmorris@...ei.org,
        Richard Haines <richard_c_haines@...nternet.com>
Subject: [PATCH 0/3] Add LSM/SELinux support for GPRS Tunneling Protocol (GTP)

These patches came about after looking at 5G open source in particular
the updated 5G GTP driver at [1]. As this driver is still under
development, added the LSM/SELinux hooks to the current stable GTP
version in kernel selinux-next [2]. Similar hooks have also been
implemented in [1] as it uses the same base code as the current 3G
version (except that it handles different packet types).

To test the 3G GTP driver there is an RFC patch for the selinux-testsuite
at [3].

To enable the selinux-testsuite GTP tests, the libgtpnl [4] library and
tools needed to be modified to:
Return ERRNO on error to detect EACCES, Add gtp_match_tunnel function,
Allow gtp-link to specify port numbers for multiple instances to
run in the same namespace.

A patch for libgtpnl is supplied in the selinux-testsuite patch as well
as setup/test instructions (libgtpnl is not packaged by Fedora)

These patches were tested on Fedora 32 with kernel [2] using the
'targeted' policy. Also ran the Linux Kernel GTP-U basic tests [5].

[1] https://github.com/PrinzOwO/gtp5g
[2] https://github.com/SELinuxProject/selinux-kernel
[3] https://lore.kernel.org/selinux/20200924085314.6120-1-richard_c_haines@btinternet.com/
[4] git://git.osmocom.org/libgtpnl.git
[5] https://osmocom.org/projects/linux-kernel-gtp-u/wiki/Basic_Testing

Changes from RFC patches:
1) Rework the LSM hook names and contents as suggested by Casey Schaufler.
This resulted in moving the gtp_dev struct from gtp.c to include/net/gtp.h
so that it is visible to the LSM modules for storing the security blob.
2) Remove pr_debug's from gtp.c security_* calls.
3) Minor GTP.rst updates.
4) Added netdev to distribution list.

Richard Haines (3):
  security: Add GPRS Tunneling Protocol (GTP) security hooks
  gtp: Add LSM hooks to GPRS Tunneling Protocol (GTP)
  selinux: Add SELinux GTP support

 Documentation/security/GTP.rst      | 100 ++++++++++++++++++++++++++++
 Documentation/security/index.rst    |   1 +
 drivers/net/gtp.c                   |  50 +++++++++-----
 include/linux/lsm_hook_defs.h       |   3 +
 include/linux/lsm_hooks.h           |  13 ++++
 include/linux/security.h            |  22 ++++++
 include/net/gtp.h                   |  21 ++++++
 security/security.c                 |  18 +++++
 security/selinux/hooks.c            |  66 ++++++++++++++++++
 security/selinux/include/classmap.h |   2 +
 security/selinux/include/objsec.h   |   4 ++
 11 files changed, 284 insertions(+), 16 deletions(-)
 create mode 100644 Documentation/security/GTP.rst

-- 
2.26.2

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ