Date: Tue, 22 Aug 2000 09:40:20 +0200 From: Marc Silver <marcs@draenor.org> To: FreeBSD-gnats-submit@freebsd.org Subject: bin/20775: potential problem with /usr/bin/sockstat Message-ID: <E13R8fU-0005yf-00@draenor.org>
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>Number: 20775
>Category: bin
>Synopsis: potential problem with /usr/bin/sockstat
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Aug 22 00:50:02 PDT 2000
>Closed-Date:
>Last-Modified:
>Originator: Marc Silver
>Release: FreeBSD 4.1-STABLE i386
>Organization:
>Environment:
This isn't a majorly serious problem, but it has the potential to cause problems if a user's path is incorrect.
>Description:
/usr/bin/sockstat incorrectly makes a call to 'netstat/fstat' instead of using the full pathname of the binary when calling it. If a user's path is incorrectly set, this can cause a false binary/script to be run in place of the correct /usr/bin/ commands.
>How-To-Repeat:
Simply create an executable netstat in your current directory, and change your PATH to that directory. When you run sockstat it will execute the binary in your current directory.
>Fix:
--- sockstat.old Tue Aug 22 09:29:21 2000
+++ sockstat Tue Aug 22 09:38:40 2000
@@ -40,7 +40,7 @@
$user, $cmd, $pid, $fd, $proto,$laddr, $faddr
.
-open NETSTAT, "netstat -Aan |" or die "'netstat' failed: $!";
+open NETSTAT, "/usr/bin/netstat -Aan |" or die "'netstat' failed: $!";
<NETSTAT>; <NETSTAT>;
while (<NETSTAT>) {
@@ -51,7 +51,7 @@
close NETSTAT;
-open FSTAT, "fstat |" or die "'fstat' failed: $!\n";
+open FSTAT, "/usr/bin/fstat |" or die "'fstat' failed: $!\n";
while (<FSTAT>) {
($user, $cmd, $pid, $fd, $inet, $type, $proto, $sock) = split;
>Release-Note:
>Audit-Trail:
>Unformatted:
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