Date: Tue, 15 Sep 1998 15:10:03 -0700 (PDT) From: Niall Smart <rotel@indigo.ie> To: freebsd-bugs@FreeBSD.ORG Subject: Re: kern/7858: GDB (ptrace?) can touch almost any executable Message-ID: <199809152210.PAA02489@freefall.freebsd.org>
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The following reply was made to PR kern/7858; it has been noted by GNATS.
From: Niall Smart <rotel@indigo.ie>
To: cagney@tpgi.com.au, FreeBSD-gnats-submit@FreeBSD.ORG,
cagney@andrew1.lnk.telstra.net
Cc: Subject: Re: kern/7858: GDB (ptrace?) can touch almost any executable
Date: Tue, 15 Sep 1998 22:55:07 +0000
On Sep 8, 5:05pm, Andrew Cagney wrote:
} Subject: kern/7858: GDB (ptrace?) can touch almost any executable
>
> GDB can be used to change the modify/creation dates of files
> the user doesn't own.
>
> Suspect PTRACE security hole.
I wouldn't call this a security hole, in fact it looks very like
the bug that randomly changes the modification dates of files.
>
> Check the files date:
>
> cagney@b1.cygnus.com$ date ; /bin/ls -lT reread
> Tue Sep 8 16:54:03 EST 1998
> -rwxr-xr-x 1 root wheel 11710 Sep 8 16:52:57 1998 reread
> Run GDB vis:
>
> cagney@b1.cygnus.com$ /usr/bin/gdb ./reread
>
> Until eventually (~30 seconds?).
>
> cagney@b1.cygnus.com$ date ; /bin/ls -lT reread
> Tue Sep 8 16:55:28 EST 1998
> -rwxr-xr-x 1 root wheel 11710 Sep 8 16:55:27 1998 reread
>
> shows up....
Ring any bells for anyone? A solution to this might fix that
other bug.
Niall
--
Niall Smart, rotel@indigo.ie.
Amaze your friends and annoy your enemies:
echo '#define if(x) if (!(x))' >> /usr/include/stdio.h
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