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In 'highly secure' mode (securelevel >= 2), the filter lists may not be tampered with. It might be desirable to allow enabling of preset filter lists, but it seems too good a candidate for a denial-of-service attack, so we don't.

This commit is contained in:
tls 1998-11-14 07:42:37 +00:00
parent 88aaa797c9
commit da1c106b85
2 changed files with 58 additions and 2 deletions
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42
sys/netinet/ip_fil.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: ip_fil.c,v 1.28 1998/07/17 00:35:23 sommerfe Exp $ */
/* $NetBSD: ip_fil.c,v 1.29 1998/11/14 07:42:37 tls Exp $ */
/*
* Copyright (C) 1993-1997 by Darren Reed.
@ -397,7 +397,11 @@ int mode;
{
u_int enable;
# if defined(__NetBSD__)
if ((securelevel >= 2) || !(mode & FWRITE))
#else
if (!(mode & FWRITE))
#endif
error = EPERM;
else {
IRCOPY(data, (caddr_t)&enable, sizeof(enable));
@ -417,7 +421,11 @@ int mode;
}
#endif
case SIOCSETFF :
#if defined(__NetBSD__)
if ((securelevel >= 2) || !(mode & FWRITE))
#else
if (!(mode & FWRITE))
#endif
error = EPERM;
else
IRCOPY(data, (caddr_t)&fr_flags, sizeof(fr_flags));
@ -429,7 +437,11 @@ int mode;
case SIOCRMAFR :
case SIOCADAFR :
case SIOCZRLST :
#if defined(__NetBSD__)
if ((securelevel >= 2) || !(mode & FWRITE))
#else
if (!(mode & FWRITE))
#endif
error = EPERM;
else
error = frrequest(unit, cmd, data, fr_active);
@ -437,13 +449,21 @@ int mode;
case SIOCINIFR :
case SIOCRMIFR :
case SIOCADIFR :
#if defined(__NetBSD__)
if ((securelevel >= 2) || !(mode & FWRITE))
#else
if (!(mode & FWRITE))
#endif
error = EPERM;
else
error = frrequest(unit, cmd, data, 1 - fr_active);
break;
case SIOCSWAPA :
#if defined(__NetBSD__)
if((securelevel >= 2) || !(mode & FWRITE))
#else
if (!(mode & FWRITE))
#endif
error = EPERM;
else {
bzero((char *)frcache, sizeof(frcache[0]) * 2);
@ -473,13 +493,21 @@ int mode;
break;
}
case SIOCFRZST :
#if defined(__NetBSD__)
if ((securelevel >= 2) || !(mode & FWRITE))
#else
if (!(mode & FWRITE))
#endif
error = EPERM;
else
frzerostats(data);
break;
case SIOCIPFFL :
#if defined(__NetBSD__)
if ((securelevel >= 2) || !(mode & FWRITE))
#else
if (!(mode & FWRITE))
#endif
error = EPERM;
else {
IRCOPY(data, (caddr_t)&tmp, sizeof(tmp));
@ -489,7 +517,11 @@ int mode;
break;
#ifdef IPFILTER_LOG
case SIOCIPFFB :
#if defined(__NetBSD__)
if ((securelevel >= 2) || !(mode & FWRITE))
#else
if (!(mode & FWRITE))
#endif
error = EPERM;
else
*(int *)data = ipflog_clear(unit);
@ -500,7 +532,11 @@ int mode;
break;
case SIOCAUTHW :
case SIOCAUTHR :
#if defined(__NetBSD__)
if ((securelevel >= 2) || !(mode & FWRITE)) {
#else
if (!(mode & FWRITE)) {
#endif
error = EPERM;
break;
}
@ -508,7 +544,11 @@ int mode;
error = fr_auth_ioctl(data, cmd, NULL, NULL);
break;
case SIOCFRSYN :
#if defined(__NetBSD__)
if ((securelevel >= 2) || !(mode & FWRITE))
#else
if (!(mode & FWRITE))
#endif
error = EPERM;
else {
#if defined(_KERNEL) && defined(__sgi)

18
sys/netinet/ip_nat.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: ip_nat.c,v 1.20 1998/07/12 15:24:00 veego Exp $ */
/* $NetBSD: ip_nat.c,v 1.21 1998/11/14 07:42:37 tls Exp $ */
/*
* Copyright (C) 1995-1997 by Darren Reed.
@ -236,7 +236,11 @@ int mode;
switch (cmd)
{
case SIOCADNAT :
#if defined(__NetBSD__)
if ((securelevel >= 2) || !(mode & FWRITE)) {
#else
if (!(mode & FWRITE)) {
#endif
error = EPERM;
break;
}
@ -281,7 +285,11 @@ int mode;
ATOMIC_INC(nat_stats.ns_rules);
break;
case SIOCRMNAT :
#if defined(__NetBSD__)
if ((securelevel >= 2) || !(mode & FWRITE)) {
#else
if (!(mode & FWRITE)) {
#endif
error = EPERM;
n = NULL;
break;
@ -323,7 +331,11 @@ int mode;
break;
}
case SIOCFLNAT :
#if defined(__NetBSD__)
if ((securelevel >= 2) || !(mode & FWRITE)) {
#else
if (!(mode & FWRITE)) {
#endif
error = EPERM;
break;
}
@ -333,7 +345,11 @@ int mode;
IWCOPY((caddr_t)&ret, data, sizeof(ret));
break;
case SIOCCNATL :
#if defined(__NetBSD__)
if ((securelevel >= 2) || !(mode & FWRITE)) {
#else
if (!(mode & FWRITE)) {
#endif
error = EPERM;
break;
}