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UPDATES.TXT
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1988-07-13
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Version 1.1 of FLU_SHOT+ has a few enhancements:
1. If you use the '-B' switch when you first run FLU_SHOT+,
the machines BIOS will be used instead of direct screen
writes. Useful for machines which are less than IBM-PC
compatible. Or those people still running CGA's who don't
like snow. It's a little slow. For the CGA users: you
ever think of how nice it would be to see an unblurred
screen? EGA's aren;t that expensive anymore....
2. I neglected to remove some comments, and there was a hole
in FLU_SHOT+ V1.0 that a worm could have exploited. The
hole has been patched securely....
3. An additional option in the FLUSHOT.DAT file:
X=<ambigious_filename>
allows a matching program to "turn off" the triggering of
FLU_SHOT+ for the entire duration of its run. This could
leave a security hole if you're not careful....so be careful!
Do not use an ambigious directory: running a trojan from there
would not trigger FLU_SHOT+. I use it for programs like
FORMAT, Norton Utilities and that kind of stuff. I'm very
careful when using it, though. And you should be, too!
4. The in-memory protection table is now checksummed so that
worms can't change the files you're attempting to protect.
--
Version 1.2 of FLU_SHOT+ has a few enhancements:
1. A new option, '-I<num>' has been added. This allows you to
determine the frequency, in 1/18 seconds, of how often the CMOS
Check (if enabled) and the Protection Table Check are going to
run. The lower the number, the higher your protection, but
the more impact it will have on system operations: they'll
be a little slower. The default is set to one second.
2. Some complaints from those having FSP in their AUTOEXEC.BAT and
having a line of the the form R=\AUTOEXEC.BAT. FSP was protecting
the AUTOEXEC.BAT file (an intended option), but the boot sequence
was causing people to have to hit a 'G' to continue with their
boot. I've installed a '-S<num>', where <num> represents how many
1/18 seconds to sleep before activating the R= option.
The default is set to 10 seconds. It will also immediately
expire on the first key hit.
3. Because CMOS and Prot Table checks are done via the timer tick
in Version 1.2, there is no need for the counter to be associated
with the CMOS flag any longer. As such, '-C' is the full option
to turn on CMOS checking.
--
Version 1.4 of FLU_SHOT+ has a few enhancements:
1. I've skipped Version 1.3 - something about the number having
bad luck and all.
2. A major bug, due to programmer stupidity, has been fixed. Alas,
this bug actually could cause some damage to your disk.
3. The X= switch works better now - it was ignored on Direct Disk
Writes
4. Some of the error messages have been made a bit clearer.
5. Complaints from some of the users have caused me to increase the
size of the checksum buffer internal to FLU_SHOT+. This has the
sad result of increasing the TSR size of the program itself -- but
I consider it a reasonable increase for speeding up the checksumming
of files.
6. If a file to be checksummed could not be found at startup time,
the previous files checksum was displayed -- this has been fixed.
7. Certain holes in FLU_SHOT's security system have been patched.
8. The size of the FLUSHOT.DAT buffer has also been increased to allow
users to specify more files to be checksummed and/or protected.
Ross, 7/13/88