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setuid back to the original caller immediately after opening the route socket.

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Opening the socket is the only privileged operation route requires.

Make a couple of static buffers bigger, and use strncpy() and snprintf() where
there's a chance of overflow.

Fixes PR bin/1903

Partially Submitted by: Ollivier Robert <roberto@keltia.freenix.fr>

Don't look up the network number if we're being asked to add a host route.

Fixes PR bin/1900

Submitted by:	Bruce A. Mah <bmah@cs.berkeley.edu> (pr bin/1900)
This commit is contained in:
Bill Fenner 1996-10-27 17:42:14 +00:00
parent 4a90dceb95
commit 4ba05f60ea
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=19209
1 changed files with 19 additions and 14 deletions
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33
sbin/route/route.c
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@ -43,7 +43,7 @@ static const char copyright[] =
static char sccsid[] = "@(#)route.c 8.3 (Berkeley) 3/19/94";
*/
static const char rcsid[] =
"$Id: route.c,v 1.14 1996/08/19 18:52:49 julian Exp $";
"$Id: route.c,v 1.15 1996/09/14 02:59:46 bde Exp $";
#endif /* not lint */
#include <sys/param.h>
@ -186,6 +186,7 @@ main(argc, argv)
s = socket(PF_ROUTE, SOCK_RAW, 0);
if (s < 0)
err(EX_OSERR, "socket");
setuid(uid);
if (*argv)
switch (keyword(*argv)) {
case K_GET:
@ -322,7 +323,7 @@ routename(sa)
struct sockaddr *sa;
{
register char *cp;
static char line[50];
static char line[MAXHOSTNAMELEN + 1];
struct hostent *hp;
static char domain[MAXHOSTNAMELEN + 1];
static int first = 1;
@ -333,9 +334,10 @@ routename(sa)
if (first) {
first = 0;
if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
(cp = index(domain, '.')))
(cp = index(domain, '.'))) {
domain[MAXHOSTNAMELEN] = '\0';
(void) strcpy(domain, cp + 1);
else
} else
domain[0] = 0;
}
@ -361,7 +363,7 @@ routename(sa)
}
}
if (cp)
strcpy(line, cp);
strncpy(line, cp, sizeof line);
else {
/* XXX - why not inet_ntoa()? */
#define C(x) (unsigned)((x) & 0xff)
@ -387,7 +389,7 @@ routename(sa)
#ifdef ISO
case AF_ISO:
(void) sprintf(line, "iso %s",
(void) snprintf(line, sizeof line, "iso %s",
iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr));
break;
#endif
@ -395,9 +397,10 @@ routename(sa)
{ u_short *s = (u_short *)sa;
u_short *slim = s + ((sa->sa_len + 1) >> 1);
char *cp = line + sprintf(line, "(%d)", sa->sa_family);
char *cpe = line + sizeof(line);
while (++s < slim) /* start with sa->sa_data */
cp += sprintf(cp, " %x", *s);
while (++s < slim && cp < cpe) /* start with sa->sa_data */
cp += snprintf(cp, cpe - cp, " %x", *s);
break;
}
}
@ -413,7 +416,7 @@ netname(sa)
struct sockaddr *sa;
{
char *cp = 0;
static char line[50];
static char line[MAXHOSTNAMELEN + 1];
struct netent *np = 0;
u_long net, mask;
register u_long i;
@ -458,7 +461,7 @@ netname(sa)
cp = np->n_name;
}
if (cp)
strcpy(line, cp);
strncpy(line, cp, sizeof(line));
else if ((in.s_addr & 0xffffff) == 0)
(void) sprintf(line, "%u", C(in.s_addr >> 24));
else if ((in.s_addr & 0xffff) == 0)
@ -490,7 +493,7 @@ netname(sa)
#ifdef ISO
case AF_ISO:
(void) sprintf(line, "iso %s",
(void) snprintf(line, sizeof(line), "iso %s",
iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr));
break;
#endif
@ -499,9 +502,10 @@ netname(sa)
{ u_short *s = (u_short *)sa->sa_data;
u_short *slim = s + ((sa->sa_len + 1)>>1);
char *cp = line + sprintf(line, "af %d:", sa->sa_family);
char *cpe = line + sizeof(line);
while (s < slim)
cp += sprintf(cp, " %x", *s++);
while (s < slim && cp < cpe)
cp += snprintf(cp, cpe - cp, " %x", *s++);
break;
}
}
@ -973,7 +977,8 @@ getaddr(which, s, hpp)
}
}
if ((val = inet_network(s)) != INADDR_NONE ||
((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0)) {
(forcehost == 0 && (np = getnetbyname(s)) != NULL &&
(val = np->n_net) != 0)) {
netdone:
if (which == RTA_DST)
inet_makenetandmask(val, &su->sin);