Critical Security Update for Scientific Linux SL5.x: CVE-2009-4273 Exploit

Date: Tue, 2 Mar 2010 11:19:39 -0600
Reply-To: Troy Dawson 
Sender: Security Errata for Scientific Linux
 
From: Troy Dawson 
Subject: Security ERRATA Important: systemtap on SL5.x i386/x86_64
Comments: To: "This email address is being protected from spambots. You need JavaScript enabled to view it."
 

Synopsis:	Important: systemtap security update
Issue date:	2010-03-01
CVE Names:	CVE-2009-4273 CVE-2010-0411

CVE-2009-4273 systemtap: remote code execution via stap-server
CVE-2010-0411 systemtap: Crash with systemtap script using __get_argv()

A flaw was found in the SystemTap compile server, stap-server, an
optional component of SystemTap. This server did not adequately sanitize
input provided by the stap-client program, which may allow a remote user
to execute arbitrary shell code with the privileges of the compile
server process, which could possibly be running as the root user.
(CVE-2009-4273)

Note: stap-server is not run by default. It must be started by a user or
administrator.

A buffer overflow flaw was found in SystemTap's tapset __get_argv()
function. If a privileged user ran a SystemTap script that called this
function, a local, unprivileged user could, while that script is still
running, trigger this flaw and cause memory corruption by running a
command with a large argument list, which may lead to a system crash or,
potentially, arbitrary code execution with root privileges. (CVE-2010-0411)

Note: SystemTap scripts that call __get_argv(), being a privileged
function, can only be executed by the root user or users in the stapdev
group. As well, if such a script was compiled and installed by root,
users in the stapusr group would also be able to execute it.

SL 5.x

 SRPMS:
systemtap-0.9.7-5.el5_4.3.src.rpm
 i386:
systemtap-0.9.7-5.el5_4.3.i386.rpm
systemtap-client-0.9.7-5.el5_4.3.i386.rpm
systemtap-initscript-0.9.7-5.el5_4.3.i386.rpm
systemtap-runtime-0.9.7-5.el5_4.3.i386.rpm
systemtap-sdt-devel-0.9.7-5.el5_4.3.i386.rpm
systemtap-server-0.9.7-5.el5_4.3.i386.rpm
systemtap-testsuite-0.9.7-5.el5_4.3.i386.rpm
 x86_64:
systemtap-0.9.7-5.el5_4.3.x86_64.rpm
systemtap-client-0.9.7-5.el5_4.3.x86_64.rpm
systemtap-initscript-0.9.7-5.el5_4.3.x86_64.rpm
systemtap-runtime-0.9.7-5.el5_4.3.x86_64.rpm
systemtap-sdt-devel-0.9.7-5.el5_4.3.i386.rpm
systemtap-sdt-devel-0.9.7-5.el5_4.3.x86_64.rpm
systemtap-server-0.9.7-5.el5_4.3.x86_64.rpm
systemtap-testsuite-0.9.7-5.el5_4.3.x86_64.rpm

-Connie Sieh
-Troy Dawson