Re: [ Hackerslab bug_paper ] Linux dump buffer overflow

i checked RedHat's 5.2 dump (dump-0.3) and it doesn't seem vunerable in an exploitable way.
There's a minor heap-overflow though:

snipped from optr.c

msg(const char *fmt, ...)
{
        .......
        va_start(ap, fmt);
#else
        va_start(ap);
#endif
        (void) vfprintf(stderr, fmt, ap);
        (void) fflush(stdout);
        (void) fflush(stderr);
        (void) vsprintf(lastmsg, fmt, ap);
        va_end(ap);
        ......
}

Lastmsg is a global variable size = 100

-lamagra
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Received on Mar 06 2000