>Number: 185551
>Category: bin
>Synopsis: rsh failes if home dir is closed and access is via NFS
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Jan 07 12:40:00 UTC 2014
>Closed-Date:
>Last-Modified:
>Originator: Daniel Braniss
>Release: FreeBSD 9.2-STABLE amd64
>Organization:
>Environment:
System: FreeBSD rnd 9.2-STABLE FreeBSD 9.2-STABLE #63: Fri Oct 18 09:53:29 IDT
2013 danny@rnd:/home/obj/rnd/r+d/stable/9/sys/HUJI amd64
also on 10.
>Description:
when the home directory of a user is open only to the owner,
rsh will fail it's mounted via NFS, the and the host has no root
permition.
The problem was diagnosed by Tomer Kleiner <man...@cs.huji.ac.il>
>How-To-Repeat:
chmod 700 ~
rsh some-host-without-root-permitions
>Fix:
this is not optimal but does fix the problem
diff -r f66afda58cc9 lib/libc/net/rcmd.c
--- a/lib/libc/net/rcmd.c Sat Jan 04 09:12:21 2014 +0200
+++ b/lib/libc/net/rcmd.c Mon Jan 06 13:15:01 2014 +0200
@@ -447,6 +447,7 @@
FILE *hostf;
uid_t uid;
int first;
+ int hostlstat;
char pbuf[MAXPATHLEN];
const struct sockaddr *raddr;
struct sockaddr_storage ss;
@@ -482,6 +483,7 @@
uid = geteuid();
(void)seteuid(pwd->pw_uid);
hostf = fopen(pbuf, "r");
+ hostlstat = lstat(pbuf, &sbuf);
(void)seteuid(uid);
if (hostf == NULL)
@@ -491,7 +493,7 @@
* user or root or if writeable by anyone but the owner, quit.
*/
cp = NULL;
- if (lstat(pbuf, &sbuf) < 0)
+ if (hostlstat < 0)
cp = ".rhosts lstat failed";
else if (!S_ISREG(sbuf.st_mode))
cp = ".rhosts not regular file";
>Release-Note:
>Audit-Trail:
>Unformatted:
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