Squashed 'import-layers/meta-security/' content from commit 4d139b9
Subtree from git://git.yoctoproject.org/meta-security
Change-Id: I14bb13faa3f2b2dc1f5d81b339dd48ffedf8562f
git-subtree-dir: import-layers/meta-security
git-subtree-split: 4d139b95c4f152d132592f515c5151f4dd6269c1
Signed-off-by: Richard Marian Thomaiyar <richard.marian.thomaiyar@linux.intel.com>
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+Meta-security
+=============
+
+This layer provides security tools, hardening tools for Linux kernels
+and libraries for implementing security mechanisms.
+
+Dependencies
+============
+
+This layer depends on:
+
+ URI: git://git.openembedded.org/openembedded-core
+ branch: master
+ revision: HEAD
+ prio: default
+
+ URI: git://git.openembedded.org/meta-openembedded/meta-oe
+ branch: master
+ revision: HEAD
+ prio: default
+
+ URI: git://git.openembedded.org/meta-openembedded/meta-perl
+ branch: master
+ revision: HEAD
+ prio: default
+
+ URI: git://git.openembedded.org/meta-openembedded/meta-networking
+ branch: master
+ revision: HEAD
+ prio: default
+
+Adding the security layer to your build
+========================================
+
+In order to use this layer, you need to make the build system aware of
+it.
+
+Assuming the security layer exists at the top-level of your
+yocto build tree, you can add it to the build system by adding the
+location of the security layer to bblayers.conf, along with any
+other layers needed. e.g.:
+
+ BBLAYERS ?= " \
+ /path/to/oe-core/meta \
+ /path/to/meta-openembedded/meta-oe \
+ /path/to/meta-openembedded/meta-perl \
+ /path/to/meta-openembedded/meta-python \
+ /path/to/meta-openembedded/meta-networking \
+ /path/to/layer/meta-security \
+
+Contents and Help
+=================
+
+In this section the contents of the layer is listed, along with a short
+help for each package.
+
+ == bastille ==
+
+ Bastille is a system hardening / lockdown program which enhances the
+ security of a Unix host. It configures daemons, system settings and
+ firewalls to be more secure. It can shut off unneeded services
+ like rcp and rlogin, and helps create "chroot jails" that help limit the
+ vulnerability of common Internet services like Web services and DNS.
+
+ usage : The functionality of Bastille which is available is
+ restricted to a purely informational one. The command:
+ bastille -c --os Yocto
+ will cause a series of menus containing security questions
+ about the system to be displayed to the user. For each
+ question, a default response, specified in the configuration
+ file which is installed with Bastille, will be selected.
+ The user may select an alternate response. When the user
+ has completed the sequence of menus Bastille saves the
+ responses to the configuration file.
+
+ The command:
+ bastille -l lists the configuration files that Bastille
+ is able to locate.
+
+ The other functionality which Bastille is intended to provide
+ is actually unavailable. This is not due to errors in poky
+ installation or configuration of the application. The Bastille
+ distribution is no longer supported. Significant modifications
+ would be required to make it possible to make use of the
+ functionality which is currently unavailable.
+
+
+ Additional information about Bastille can be found in the package
+ README file and other documentation.
+
+ Alternatives to Bastille include buck-security and checksecurity,
+ described elsewhere in this file.
+
+
+ == redhat-security ==
+
+ Sometimes you want to check different aspects of a distribution for security problems.
+ This can be anything from file permissions to correctness of code. This is a collection of those tools.
+ Depending on what information the tool has to access, it may need to be run as root.
+
+ - rpm-chksec.sh : This will take an rpm name as input and verify each ELF file to see if its compiled with the intended flags
+ to most effectively use PIE and RELRO. Green is good, Orange could use work but is acceptable, and Red needs fixing.
+ It has a mode --all that is the equivalent of using rpm -qa and feeding the packages to it.
+ In this mode it will only give a summary result for the package. To find which files don't comply,
+ re-run using just the package name.
+
+ !!! WARNING !!! - in order to use this script you need to add to your conf/local.conf file the following lines:
+ IMAGE_ROOTFS_EXTRA_SPACE = "" - specifying the extra space of the image
+ IMAGE_FEATURES += "package management" - for the correct output of rpm -qa
+
+ - find-nodrop-groups.sh : This will scan a whole file system to see if a program makes calls to change UID
+ and GID without also calling setgroups or initgroups.
+
+ - rpm-drop-groups.sh : Same as above, but takes an rpm name instead.
+
+ - find-chroot.sh : This script scans the whole file system looking for ELF files that calls chroot(2) that also do not include a call to chdir.
+ Programs that fail to do this do not have the cwd inside the chroot. This means the app can escape the protection that was intended.
+
+ - find-chroot-py.sh : This test is like the one above except it examines python scripts for the same problem.
+
+ - find-execstack.sh : This program scans the whole file system for ELF programs that have marked the stack as being executable.
+ This means that if the program has another vulnerablity such as stack buffer overflow,
+ any code the attacker places there is executable. Any program found must be fixed.
+
+ - find-hidden-exec.sh : This program scans the whole file system looking for excutables that are hidden.
+ Anything found must be investigated since its highly unusual for executables to be hidden.
+
+ - find-sh4errors.sh : This program scans the whole file system looking for shell scripts.
+ It then does a sh -n on the script which causes bash to parse the file to see if there are any mistakes.
+
+ - selinux-check-devices.sh : This script checks the /dev directory to see if there are any devices that are not correctly labeled.
+ Anything found by this test should be reported so that selinux policy can be fixed.
+ This test is very hardware specific, so to be effective a lot of people with different hardware
+ should run this test each upstream kernel version release.
+
+ - selinux-ls-unconfined.sh : This script scans the running processes and looks for anything labeled with initrc_t or inetd.
+ These both mean that there are daemons that do not have policy and are therefore running unconfined.
+ These should be reported as SE Linux policy problems. Because it checks currently running daemons,
+ the more you have running, the better the test is.
+
+ - find-sh4tmp.sh : This script scans the whole filesystem to check if shell scripts are using well known tmp file names
+ instead of obscure ones created by something like mktemp.
+
+ - find-elf4tmp.sh : This script scans the whole file system for ELF files using /tmp. When it finds this,
+ it also looks to see if any of the known good random name generator functions is called by looking
+ at the symbol table. If not, it will output the string.
+
+ - lib-bin-check.sh : This will check all installed library packages to see if an application is also part of the package.
+ The relationship to security is that the SHA256 hash check will fail if a 32 bit version overwrites it.
+ Also, the less binaries on a system, the more secure it is by virtue of removing the chance for an exploitable bug.
+
+
+ usage : simply invoke the script name in the terminal.
+
+
+ == pax-utils ==
+
+ ( This package can be found in oe-core )
+
+ pax-utils is a small set of various PaX aware and related utilities for
+ ELF binaries.
+
+ - scanelf : With this application you can print out information specific to the ELF structure of a binary.
+ For more help please consult the man pages or the readme file.
+
+ - pspax : is a user-space utility that scans the proc directory and list
+ ELF types, as well as their respective PaX flags and filenames and
+ attributes. Depending on build options, it may additionaly display the
+ process running set of capabilities.
+
+ - scanmacho : is a user-space utility to quickly scan given
+ Mach-Os, directories, or common system paths for different information. This
+ may include Mach-O types, their install_names, etc.
+
+ - dumpelf : is a user-space utility to dump all of the internal
+ ELF structures into the equivalent C structures for fun debugging and/or
+ reference purposes.
+
+
+ usage : simply invoke the script name in the terminal.
+
+
+ == buck-security ==
+
+ Buck-Security is a security scanner for Debian and Ubuntu Linux. It runs a couple of important checks and helps you to harden your Linux
+ system. This enables you to quickly overview the security status of your Linux system.
+
+ usage : !!! before starting to use this tool please run the following command: !!!
+
+ export GPG_TTY=`tty`
+
+ This command is needed for the usage of the comand --make-checksum, which creates
+ a checksum for the files in the system.
+
+ switch to directory /usr/local/buck-security.
+ before running the script, you should check the activated checks in conf/buck-security.conf file.
+ after altering the changes, save the file and simply run :
+
+ ./buck-security
+
+ you can choose between different outputs : 1, 2(default) or 3.
+
+ More detailed usage can be found typing ./buck-security --help
+
+
+ == libseccomp ==
+
+ The libseccomp library provides and easy to use, platform independent, interface to the Linux Kernel's syscall filtering mechanism: seccomp.
+ The libseccomp API is designed to abstract away the underlying BPF based syscall filter language and present a more conventional
+ function-call based filtering interface that should be familiar to, and easily adopted by application developers.
+
+ usage : More detailed usage can be found in the man pages and README file of the package.
+
+
+
+ == checksecurity ==
+
+ checksecurity is a simple package which will scan your system for several simple security holes.
+ It uses a simple collection of plugins, all of which are shell scripts which are configured by environmental variables.
+
+
+ usage : To start checksecurity simply write in the terminal :
+
+ checksecurity
+
+ More detailed usage can be found in the man pages and README file of the package.
+
+
+ == nikto ==
+
+ Nikto is an Open Source (GPL) web server scanner which performs comprehensive tests against web servers for multiple items,
+ including over 6500 potentially dangerous files/CGIs, checks for outdated versions of over 1250 servers, and version specific
+ problems on over 270 servers. It also checks for server configuration items such as the presence of multiple index files,
+ HTTP server options, and will attempt to identify installed web servers and software.
+
+ usage : To start nikto simply write in the terminal :
+
+ nikto
+
+ More detailed usage can be found in the man pages and README file of the package.
+
+
+ == nmap ==
+
+ Nmap ("Network Mapper") is a free and open source (license) utility for network discovery and security auditing.
+ Many systems and network administrators also find it useful for tasks such as network inventory,
+ managing service upgrade schedules, and monitoring host or service uptime.
+
+ usage : To start nikto simply write in the terminal :
+
+ nmap
+
+ More detailed usage can be found in the man pages and README file of the package.
+
+Maintenance
+-----------
+
+Send pull requests, patches, comments or questions to yocto@yoctoproject.org
+
+When sending single patches, please using something like:
+'git send-email -1 --to yocto@yoctoproject.org --subject-prefix=meta-security][PATCH'
+
+Maintainers: Saul Wold <sgw@linux.intel.com>
+ Armin Kuster <akuster@mvista.com>
+
+
+License
+=======
+
+All metadata is MIT licensed unless otherwise stated. Source code included
+in tree for individual recipes is under the LICENSE stated in each recipe
+(.bb file) unless otherwise stated.