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-
- 'tiger' is a set of scripts that scan a Un*x system looking for
- security problems, in the same fashion as Dan Farmer's COPS. 'tiger'
- was originally developed to provide a check of UNIX systems on the A&M
- campus that want to be accessed from off campus (clearance through the
- packet filter). As such, we needed something that *anyone* could run
- if they could figure out how to get it down to their machine.
-
- If you just want to run it, without regards to time considerations,
- then just 'cd' into the tiger directory and run './tiger' as 'root'.
-
- ---> You should check to see if you have the latest digital signatures
- for the system(s) you are checking. I regularly place updated
- signature files on anonymous FTP at
-
- net.tamu.edu:/pub/security/TAMU/tiger-sigs/*
-
- The util/installsigs script can be used to install the updated
- signatures. As of Tiger 2.2.2, installsigs is also capable
- of installing signatures for new OS releases (not new platforms
- or major releases though).
-
- ALSO NOTE NOTE: There are fairly complete signature files for
- various releases of SunOS available in the tiger-sigs/os-dist
- directory. These should be used if you want to thoroughly scan
- your system for altered binaries.
-
- *NOTE*
-
- The 'tigerrc' file is set up for TAMU hosts, and disables/reduces some
- of the checks. You should probably copy 'tigerrc-dist' to 'tigerrc'
- and edit it to taste. It is set for a fuller check mode (TAMU hosts
- might want to run with this config file as well). 'tigerrc-all' has
- everything already maxed out and enabled (except for PATH_ALL).
-
- (Or use the '-c' switch to use an alternate tigerrc file as of 2.2.2)
-
- ------------------------------------------------------------------------
-
- I recommend that you read the USING file for anything other than the
- aforementioned situation.
-
- ****
-
- See the file COPYING for legal stuff.
-
- ------------------------------------------------------------------------
-
- If you have any thing to say about 'tiger', please let us know. New
- things to check, how to improve things, *anything*, send it in... if
- you think someone else has already sent in a bug report, suggestion,
- etc., send it in anyway... the more times someone hits me over the
- head with something, the more likely it is to get fix/included...
-
- ********** NOTE NOTE NOTE NOTE NOTE NOTE ************
-
- There is now a mailling list available for 'tiger'. To subscribe,
- send mail to 'majordomo@net.tamu.edu'. Include in the body of the
- message:
-
- subscribe tiger
-
- or
-
- subscribe tiger alternate_email_address
-
- The mailling list is managed via Brent Chapman's 'majordomo' package.
-
- Doug.
-
- Doug.Schales@net.tamu.edu
-
- New Stuff 01/06/94
- ---------
-
- Updated signature files for SunOS 4.x and SunOS 5.x.
-
- Bug fixes...
-
- If the current directory is a descendant of a directory for which the
- user does not have 'read' permissions (i.e., search only), then csh
- and find do not always work. Workaround is to 'cd /' where necessary.
- Not sure this has been completely implemented.
-
- typo in scripts/sub/check_devs (Multiple people)
-
- scripts/sub/check_devs exited if GENCLIENTDIRS undefined (Sally Noonan).
-
- -x 'test' switch is not portable. (Sally Noonan)
-
- AIX doesn't need '-g' (Dorian Deane)
-
- IRIX test doesn't shortcircuit (Steve Rikli)
-
- IRIX config had wrong definition for DATECMD and TIMECMD (Steve Rikli)
-
- Crude 'smrsh' check performing poorly (Patrick Nolan & Mohamed el Lozy)
-
- Changes for performance and robustness, as suggested by Goran
- Larsson. A C program is used to get file ownership and permissions
- instead of 'ls | awk'. (If the C program won't compile, we fall
- back to 'ls | awk'.
-
- Changes to check_anonftp for performance.
-
- Added -c switch to allow specifying alternate 'tigerrc' script (John Reynolds)
-
- 'tigexp' loses command line parameters on NeXT 3.0 (Kelly Cunningham)
-
- Added ethernet device files to check list for SunOS 5 (was already there
- in SunOS 4). Also inspects /var/sadm/install/contents to check the
- perms there so that they don't get accidentally changed back.
-
- New Stuff 10/31/93
- ---------
-
- Mailling list available. See the README file for more information.
-
- Support for TAMU Linux distribution, may work on other Linux' as well.
-
- Updated signatures for SunOS 4.x & SunOS 5.x for security patches.
-
- 'installsig' script for installing new signature files (util/installsig).
- We will try to maintain up to date security patch signature files in
- the directory net.tamu.edu:/pub/security/TAMU/tiger-sigs. Note that
- at present, only SunOS 4.x and SunOS 5.x are being actively maintained
- (not that there is a bias here, it is just easier for me to get information
- on these... contributions will be welcomed).
-
- Various minor bug fixes relating to various platforms.
-
- Fixed check_suid to handle MD5 signatures.
-
- check_embedded now will optionally wait for the file system scans to
- complete and will check all setuid executables found for "bad"
- embedded pathnames. See 'tigerrc' for configuring details.
-
- New Stuff 08/17/93
- ---------
-
- Script for checking embedded pathnames. The other scripts collect
- filenames which are then fed into the check_embedded script. This
- checks the ownership and permissions of all of these embedded pathnames.
- Be warned... this can generate *lots* of output.
-
- Pathname checking is now much more complete. Every "problem" is
- reported in detail, instead of saying "Hey, there's a problem with
- this pathname".
-
- 'tigercron' should work a lot better now.
-
- Script for checking BSD printcap printer control file.
-
- Signatures for IRIX 4.0.5*, thanks to Steve Rikli.
- Signatures for NeXTOS 3.1, thanks to William McVey, et al.
-
- Cleaned up output... much of the output now gets formatted to (default)
- 80 columns.
-
- Digital signature checking now works with SNEFRU or MD5. Automagically
- detects which signature to generate.
-
- Signature checking is a lot faster now, especially if you have a
- clean system (the signature database is ordered such that the
- "good" signatures are first).
-
- Interface to 'password' generator scripts changed so that the
- generator scripts can do sanity checking on the base files. Interfaces
- to all of the other generator scripts will be changed in next release.
-
- Makefile for installing everything. I'm not happy with the installation
- process this time either... if anyone wants to contribute a snazzy
- installation script I'll be happy to include it...
-
-
- New Stuff 06/17/93
- ---------
-
- First off, there are some man pages in the 'man' directory. They are
- definitely lacking. If I ever stop adding stuff to the package, maybe
- I will be able to write better documentation.
-
- ********
- Explain facility. All messages (should) have a message ID associated
- with them in square brackets []. The script 'tigexp' can be used to
- get an explanation of the message. Some (many?) of the explanations
- are lacking. You can also insert the explanations into the output
- of 'tiger' by using the '-e' flag. If anyone has suggestions or
- improved explanations, don't hesitate to send them to me.
-
- ********
- Crack 4.1 interface. 'tiger' will now run Alec Muffett's password
- cracker 'Crack'. See the 'tigerrc' file and 'site-sample' file for
- information on enabling it (it is disabled by default).
-
- ********
- Systems:
-
- SunOS 4.1.1 sun3, 4.1.1 sun4, 4.1.2, 4.1.3, 5.1, 5.2 sun4
- NeXT 3.0
-
- There, but untested (and I do mean untested). You can try them,
- but they have *never* been used, so I have no idea what to expect.
- Some parts are missing (i.e., no signature files).
-
- AIX 3.x (if this one works... any idea why so many setuid's on AIX 3?)
- HPUX (probably anything up to 9.x)
- IRIX 4.x
- UNICOS 6.x 7.x (if those pesky users didn't use the machine so much...)
-
- ********
- More checks. A few of the additions since the last release are:
-
- check_aliases: Check mail aliases for problems.
- check_cron: Check 'cron' entries for problems.
- check_group: Cross reference 'group' files for problems.
- check_passwd: Cross reference 'passwd' files for problems.
- check_path: Check 'root' (and optionally all users) PATH for problems.
-
- In addition all previous scripts have been beefed up with many more
- checks. File Permission databases have been improved (though they
- still need more work). Scripts which check the path to executables
- and files now check the pathname thoroughly, even in the face of
- symbolic links.
-
- The file system scans now report device files, world writable
- directories, symbolic links to system files, in addition to setuid
- executables. Also the setuid checks now attempt to determine if a
- setuid program is an old version of a binary for which a security
- patch was released (i.e., it was moved out of the way, but never
- deleted or chmod'd, and hence may still be a security problem).
-
- For servers of diskless or dataless clients, some "quick" checks of
- the clients can be performed on the server (see man/tiger.man). Not
- everything can be checked. Plus, support is not complete.
-
- It is possible to install 'tiger' now so that you don't have to
- feed it all the names of the directories on each invocation.
- Just run 'Install'... it will prompt for names.
-
- 'tigercron' provides a simple-cron facility with report differencing
- capability and mailing of reports. This is just started and needs
- more work to be really useful. See the 'cronrc' file for a sample
- input to it.
-
- Checks for the availability of a utility commands have been moved
- nearer to where they are actually needed (as opposed to having them
- at the top of each script). This enables more checks to be performed
- when only a few commands are missing.
-
- All cleanup of scratch files goes through the 'delete' routine which
- won't delete a file that isn't in the scratch work directory. This
- is to prevent programmer errors from zapping the wrong file [what?
- programmer errors? Never... :)]
-
- Some more C code added. Handling of obtaining a compilation of the
- source improved. For casual use, nothing need be done. The C code
- will be compiled and installed in the Bindir (TIGERHOME/bin by default).
- For regular use, or use in a large group of systems, sharing the
- tiger directories, the binaries can be compiled and stored in the
- respective system directories. The scripts will use the binary
- directly from that directory. The Solaris 2.x (SunOS 5) directory
- provides precompiled binaries (no C compiler by default).
-
- Finally, if you try to run this on a system with an old or broken
- Bourne shell, or one without functions, have a peek at util/setsh.
- This will change all the '#!' headers to some other shell (i.e. ksh or
- bash). Note that 'tiger' has never been run under either of these,
- but it might be worth a shot.
-
-