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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Moderate: systemtap security update
Advisory ID:       RHSA-2011:0842-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2011-0842.html
Issue date:        2011-05-31
CVE Names:         CVE-2011-1769 CVE-2011-1781 
=====================================================================

1. Summary:

Updated systemtap packages that fix two security issues are now available
for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having moderate
security impact. Common Vulnerability Scoring System (CVSS) base scores,
which give detailed severity ratings, are available for each vulnerability
from the CVE links in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64
Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64
Red Hat Enterprise Linux HPC Node (v. 6) - x86_64
Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64
Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64

3. Description:

SystemTap is an instrumentation system for systems running the Linux
kernel, version 2.6. Developers can write scripts to collect data on the
operation of the system.

Two divide-by-zero flaws were found in the way SystemTap handled malformed
debugging information in DWARF format. When SystemTap unprivileged mode was
enabled, an unprivileged user in the stapusr group could use these flaws to
crash the system. Additionally, a privileged user (root, or a member of the
stapdev group) could trigger these flaws when tricked into instrumenting a
specially-crafted ELF binary, even when unprivileged mode was not enabled.
(CVE-2011-1769, CVE-2011-1781)

SystemTap users should upgrade to these updated packages, which contain a
backported patch to correct these issues.

4. Solution:

Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/kb/docs/DOC-11259

5. Bugs fixed (http://bugzilla.redhat.com/):

702687 - CVE-2011-1769 systemtap: does not guard against DWARF operations div-by-zero errors, which can cause a kernel panic
703972 - CVE-2011-1781 systemtap: divide by zero stack unwinding flaw

6. Package List:

Red Hat Enterprise Linux Desktop (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client-6.1.z/en/os/SRPMS/systemtap-1.4-6.el6_1.1.src.rpm

i386:
systemtap-1.4-6.el6_1.1.i686.rpm
systemtap-client-1.4-6.el6_1.1.i686.rpm
systemtap-debuginfo-1.4-6.el6_1.1.i686.rpm
systemtap-grapher-1.4-6.el6_1.1.i686.rpm
systemtap-initscript-1.4-6.el6_1.1.i686.rpm
systemtap-runtime-1.4-6.el6_1.1.i686.rpm

x86_64:
systemtap-1.4-6.el6_1.1.x86_64.rpm
systemtap-client-1.4-6.el6_1.1.x86_64.rpm
systemtap-debuginfo-1.4-6.el6_1.1.x86_64.rpm
systemtap-grapher-1.4-6.el6_1.1.x86_64.rpm
systemtap-initscript-1.4-6.el6_1.1.x86_64.rpm
systemtap-runtime-1.4-6.el6_1.1.x86_64.rpm

Red Hat Enterprise Linux Desktop Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client-6.1.z/en/os/SRPMS/systemtap-1.4-6.el6_1.1.src.rpm

i386:
systemtap-debuginfo-1.4-6.el6_1.1.i686.rpm
systemtap-sdt-devel-1.4-6.el6_1.1.i686.rpm
systemtap-server-1.4-6.el6_1.1.i686.rpm
systemtap-testsuite-1.4-6.el6_1.1.i686.rpm

x86_64:
systemtap-debuginfo-1.4-6.el6_1.1.i686.rpm
systemtap-debuginfo-1.4-6.el6_1.1.x86_64.rpm
systemtap-sdt-devel-1.4-6.el6_1.1.i686.rpm
systemtap-sdt-devel-1.4-6.el6_1.1.x86_64.rpm
systemtap-server-1.4-6.el6_1.1.x86_64.rpm
systemtap-testsuite-1.4-6.el6_1.1.x86_64.rpm

Red Hat Enterprise Linux HPC Node (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode-6.1.z/en/os/SRPMS/systemtap-1.4-6.el6_1.1.src.rpm

x86_64:
systemtap-1.4-6.el6_1.1.x86_64.rpm
systemtap-client-1.4-6.el6_1.1.x86_64.rpm
systemtap-debuginfo-1.4-6.el6_1.1.x86_64.rpm
systemtap-initscript-1.4-6.el6_1.1.x86_64.rpm
systemtap-runtime-1.4-6.el6_1.1.x86_64.rpm

Red Hat Enterprise Linux HPC Node Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode-6.1.z/en/os/SRPMS/systemtap-1.4-6.el6_1.1.src.rpm

x86_64:
systemtap-debuginfo-1.4-6.el6_1.1.i686.rpm
systemtap-debuginfo-1.4-6.el6_1.1.x86_64.rpm
systemtap-grapher-1.4-6.el6_1.1.x86_64.rpm
systemtap-sdt-devel-1.4-6.el6_1.1.i686.rpm
systemtap-sdt-devel-1.4-6.el6_1.1.x86_64.rpm
systemtap-server-1.4-6.el6_1.1.x86_64.rpm
systemtap-testsuite-1.4-6.el6_1.1.x86_64.rpm

Red Hat Enterprise Linux Server (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server-6.1.z/en/os/SRPMS/systemtap-1.4-6.el6_1.1.src.rpm

i386:
systemtap-1.4-6.el6_1.1.i686.rpm
systemtap-client-1.4-6.el6_1.1.i686.rpm
systemtap-debuginfo-1.4-6.el6_1.1.i686.rpm
systemtap-grapher-1.4-6.el6_1.1.i686.rpm
systemtap-initscript-1.4-6.el6_1.1.i686.rpm
systemtap-runtime-1.4-6.el6_1.1.i686.rpm
systemtap-sdt-devel-1.4-6.el6_1.1.i686.rpm
systemtap-server-1.4-6.el6_1.1.i686.rpm

ppc64:
systemtap-1.4-6.el6_1.1.ppc64.rpm
systemtap-client-1.4-6.el6_1.1.ppc64.rpm
systemtap-debuginfo-1.4-6.el6_1.1.ppc.rpm
systemtap-debuginfo-1.4-6.el6_1.1.ppc64.rpm
systemtap-grapher-1.4-6.el6_1.1.ppc64.rpm
systemtap-initscript-1.4-6.el6_1.1.ppc64.rpm
systemtap-runtime-1.4-6.el6_1.1.ppc64.rpm
systemtap-sdt-devel-1.4-6.el6_1.1.ppc.rpm
systemtap-sdt-devel-1.4-6.el6_1.1.ppc64.rpm
systemtap-server-1.4-6.el6_1.1.ppc64.rpm

s390x:
systemtap-1.4-6.el6_1.1.s390x.rpm
systemtap-client-1.4-6.el6_1.1.s390x.rpm
systemtap-debuginfo-1.4-6.el6_1.1.s390.rpm
systemtap-debuginfo-1.4-6.el6_1.1.s390x.rpm
systemtap-grapher-1.4-6.el6_1.1.s390x.rpm
systemtap-initscript-1.4-6.el6_1.1.s390x.rpm
systemtap-runtime-1.4-6.el6_1.1.s390x.rpm
systemtap-sdt-devel-1.4-6.el6_1.1.s390.rpm
systemtap-sdt-devel-1.4-6.el6_1.1.s390x.rpm
systemtap-server-1.4-6.el6_1.1.s390x.rpm

x86_64:
systemtap-1.4-6.el6_1.1.x86_64.rpm
systemtap-client-1.4-6.el6_1.1.x86_64.rpm
systemtap-debuginfo-1.4-6.el6_1.1.i686.rpm
systemtap-debuginfo-1.4-6.el6_1.1.x86_64.rpm
systemtap-grapher-1.4-6.el6_1.1.x86_64.rpm
systemtap-initscript-1.4-6.el6_1.1.x86_64.rpm
systemtap-runtime-1.4-6.el6_1.1.x86_64.rpm
systemtap-sdt-devel-1.4-6.el6_1.1.i686.rpm
systemtap-sdt-devel-1.4-6.el6_1.1.x86_64.rpm
systemtap-server-1.4-6.el6_1.1.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server-6.1.z/en/os/SRPMS/systemtap-1.4-6.el6_1.1.src.rpm

i386:
systemtap-debuginfo-1.4-6.el6_1.1.i686.rpm
systemtap-testsuite-1.4-6.el6_1.1.i686.rpm

ppc64:
systemtap-debuginfo-1.4-6.el6_1.1.ppc64.rpm
systemtap-testsuite-1.4-6.el6_1.1.ppc64.rpm

s390x:
systemtap-debuginfo-1.4-6.el6_1.1.s390x.rpm
systemtap-testsuite-1.4-6.el6_1.1.s390x.rpm

x86_64:
systemtap-debuginfo-1.4-6.el6_1.1.x86_64.rpm
systemtap-testsuite-1.4-6.el6_1.1.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation-6.1.z/en/os/SRPMS/systemtap-1.4-6.el6_1.1.src.rpm

i386:
systemtap-1.4-6.el6_1.1.i686.rpm
systemtap-client-1.4-6.el6_1.1.i686.rpm
systemtap-debuginfo-1.4-6.el6_1.1.i686.rpm
systemtap-grapher-1.4-6.el6_1.1.i686.rpm
systemtap-initscript-1.4-6.el6_1.1.i686.rpm
systemtap-runtime-1.4-6.el6_1.1.i686.rpm
systemtap-sdt-devel-1.4-6.el6_1.1.i686.rpm
systemtap-server-1.4-6.el6_1.1.i686.rpm

x86_64:
systemtap-1.4-6.el6_1.1.x86_64.rpm
systemtap-client-1.4-6.el6_1.1.x86_64.rpm
systemtap-debuginfo-1.4-6.el6_1.1.i686.rpm
systemtap-debuginfo-1.4-6.el6_1.1.x86_64.rpm
systemtap-grapher-1.4-6.el6_1.1.x86_64.rpm
systemtap-initscript-1.4-6.el6_1.1.x86_64.rpm
systemtap-runtime-1.4-6.el6_1.1.x86_64.rpm
systemtap-sdt-devel-1.4-6.el6_1.1.i686.rpm
systemtap-sdt-devel-1.4-6.el6_1.1.x86_64.rpm
systemtap-server-1.4-6.el6_1.1.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation-6.1.z/en/os/SRPMS/systemtap-1.4-6.el6_1.1.src.rpm

i386:
systemtap-debuginfo-1.4-6.el6_1.1.i686.rpm
systemtap-testsuite-1.4-6.el6_1.1.i686.rpm

x86_64:
systemtap-debuginfo-1.4-6.el6_1.1.x86_64.rpm
systemtap-testsuite-1.4-6.el6_1.1.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2011-1769.html
https://www.redhat.com/security/data/cve/CVE-2011-1781.html
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2011 Red Hat, Inc.
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