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Drop privileges if not using standard namelist or kernel file.

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Submitted by:	smpatel (Sujal Patel)
This commit is contained in:
Paul Traina 1996-05-30 02:20:10 +00:00
parent 5110a08c3c
commit 66e5b18f29
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=15993
2 changed files with 15 additions and 1 deletions
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7
usr.bin/w/w.c
View File

@ -179,6 +179,13 @@ main(argc, argv)
_res.retrans = 2; /* resolver timeout to 2 seconds per try */
_res.retry = 1; /* only try once.. */
/*
* Discard setgid privileges if not the running kernel so that bad
* guys can't print interesting stuff from kernel memory.
*/
if (nlistf != NULL || memf != NULL)
setgid(getgid());
if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL)
errx(1, "%s", errbuf);

9
usr.sbin/slstat/slstat.c
View File

@ -22,7 +22,7 @@
*/
#ifndef lint
static char rcsid[] = "$Id: slstat.c,v 1.3 1994/11/19 13:57:21 jkh Exp $";
static char rcsid[] = "$Id: slstat.c,v 1.4 1995/05/30 03:52:30 rgrimes Exp $";
#endif
#include <stdio.h>
@ -132,6 +132,13 @@ main(argc, argv)
kflag++;
}
}
/*
* Discard setgid privileges if not the running kernel so that bad
* guys can't print interesting stuff from kernel memory.
*/
if (system != NULL || kmemf != NULL)
setgid(getgid());
kvm_h = kvm_openfiles(system, kmemf, NULL, O_RDONLY, errbuf);
if (kvm_h == 0) {
(void)fprintf(stderr,