restoretextmode problems

robert (kotzFLASH.NET)
Mon, 11 Oct 1999 23:01:15 -0500

• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
• Next message: Mithun Bhattacharya: "Re: Window manager - implementation bug/feature ???"
• Previous message: Andrew Reiter: "Re: fbsd 3.3 ospf_monitor research"

Well, I personally did not find this bug, but I helped "diagnose" it if
you will. Basically, restoretextmode doesn't check to see that the data it
reads from a file is CORRECT data (with restoretextmode -r that is, so if
you feed it enough crap from a file (for example, in older versions,
/etc/passwd is big enough) you can turn the monitor off. In newer
versions, it has to be a larger number, please forgive the fact that I
deleted the code a while back and don't remember that number exactly, but
3000 does it I'm pretty sure. Anyway, the monitor turns off, and you can't
turn it back on without a reboot, found that out the hard way. The one
thing about this, is, when tried remotely, you get the error that you
aren't the current owner of the console. Now, I seem to remember a
previous exploit that came across the same error and there was a way
around it, but I don't remember exactly how it was, anyone know?

• Next message: Mithun Bhattacharya: "Re: Window manager - implementation bug/feature ???"
• Previous message: Andrew Reiter: "Re: fbsd 3.3 ospf_monitor research"

This archive was generated by hypermail 2.0b3 on Tue Oct 12 1999 - 10:22:08 CDT