Mercurial > hg > early-roguelike
view arogue5/network.h @ 176:db1c9a21a7c3
srogue: prevent overflowing the score file name.
If SCOREFILE is not defined, roguehome() is called to find a directory
for the score file. It copies up to PATH_MAX-20 bytes from an
environment variable to a static buffer. Later these are strcpy()'d to
scorefile, which is of size LINLEN. Unfortunately LINLEN is 80 and
PATH_MAX is at least 256. On Linux, it happens to be 4096.
I haven't yet managed to crash or exploit it, but there are surely no
beneficial consequences, so roguehome() has been modified to check the
length, and the string it returns is also checked in main().
author | John "Elwin" Edwards |
---|---|
date | Sun, 02 Aug 2015 12:14:47 -0400 |
parents | 0ed67132cf10 |
children |
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/* * Networking information -- should not vary among networking machines * * Advanced Rogue * Copyright (C) 1984, 1985 Michael Morgan, Ken Dalka and AT&T * All rights reserved. * * See the file LICENSE.TXT for full copyright and licensing information. */ #define SYSLEN 9 #define LOGLEN 8 #define NUMNET 6 #undef NUMNET struct network { char *system; char *rogue; }; extern struct network Network[]; /* This system's name -- should not be defined if uname() is available */