Date: Sun, 23 Mar 1997 15:35:19 +0100 From: j@uriah.heep.sax.de (J Wunsch) To: dv@kis.ru (Dmitry Valdov) Cc: freebsd-bugs@freebsd.org, peter@spinner.DIALix.COM (Peter Wemm), security-officer@freebsd.org Subject: Re: sendmail can't create PID file because of owner permission of /var/run Message-ID: <19970323153519.BW27841@uriah.heep.sax.de> In-Reply-To: <Pine.BSF.3.95q.970323165210.2884A-100000@xkis.kis.ru>; from Dmitry Valdov on Mar 23, 1997 16:56:31 %2B0300 References: <Pine.BSF.3.95q.970323165210.2884A-100000@xkis.kis.ru>
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As Dmitry Valdov wrote:
> sendmail doesn't create sendmai.pid file
> if /var/run directory owned by other than root. Default owner of /var/run in
> 2.2R is 'bin'. The problem appears in 2.1.5R too.
> sendmail version is 8.8.5
>
> Workaround:
> chown root:bin /var/run
safefile() in sendmail/src/util.c goes great lengths to ensure files
are only attempted to be opened if the permissions of the directory
allow this. Anyway, it looks as if it requires any directory to be
world-writeable if the directory is not owned by the owner of the
requesting process -- even if the owner is root. I'm not sure
wheather this is a bug or a feature. The following diff fixes this,
but i'm not 100 % sure wheather this fix is right or not.
cvs diff: Diffing /usr/src/usr.sbin/sendmail/src
Index: /usr/src/usr.sbin/sendmail/src/util.c
===================================================================
RCS file: /home/cvs/src/usr.sbin/sendmail/src/util.c,v
retrieving revision 1.12
diff -u -u -r1.12 util.c
--- util.c 1997/01/27 07:43:29 1.12
+++ util.c 1997/03/23 14:28:49
@@ -627,7 +627,7 @@
if (stat(fn, &stbuf) >= 0)
{
int md = S_IWRITE|S_IEXEC;
- if (stbuf.st_uid != uid)
+ if (uid != 0 && stbuf.st_uid != uid)
md >>= 6;
if ((stbuf.st_mode & md) != md)
errno = EACCES;
--
cheers, J"org
joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)
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