[25518] in bugtraq
Re: ps under FreeBSD
daemon@ATHENA.MIT.EDU (Guillaume PELAT)
Mon May 20 20:22:19 2002
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From: Guillaume PELAT <guillaume.pelat@intexxia.com>
Reply-To: guillaume.pelat@intexxia.com
To: bugtraq@securityfocus.com
Date: Sun, 19 May 2002 11:51:08 +0200
In-Reply-To: <20020518204038.A41695@fremen.dhs.org>
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Message-Id: <200205191151.08626.guillaume.pelat@intexxia.com>
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On Saturday 18 May 2002 20:40, Jakub Filonik wrote:
> Hi,
> I was playing with ps on FreeBSD with kern.ps_showallprocs=0 and I was
> surprised when I have seen that I may see info about running process, if I
> know it's ID
After some investigation, the problem seems to be in sysctl_kern_proc
function in /sys/kern/kern_proc.c
The following patch seems to fix the problem(for freebsd 4.5):
diff -dru sys/kern/kern_proc.c sys.new/kern/kern_proc.c
--- sys/kern/kern_proc.c Tue May 1 15:39:06 2001
+++ sys.new/kern/kern_proc.c Sat May 18 15:27:57 2002
@@ -453,6 +453,8 @@
return (0);
if (!PRISON_CHECK(curproc, p))
return (0);
+ if ((!ps_showallprocs) && p_trespass(curproc, p))
+ return (0);
error = sysctl_out_proc(p, req, 0);
return (error);
}
--
Guillaume Pelat
