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Red Hat: RHSA-2011:0841-01 Moderate: SystemTap Divide-By-Zero Issue

red hat
Calendar Grey May 31, 2011
Dist Redhat Esm H88
The latest security patch for Systemtap addresses a critical divide-by-zero vulnerability in all architectures of Red Hat Enterprise Linux 5.
Updated systemtap packages that fix one security issue are now available for Red Hat Enterprise Linux 5

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

Summary

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.
A divide-by-zero flaw was 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 this flaw to crash the system. Additionally, a privileged user (root, or a member of the stapdev group) could trigger this flaw when tricked into instrumenting a specially-crafted ELF binary, even when unprivileged mode was not enabled. (CVE-2011-1769)
SystemTap users should upgrade to these updated packages, which contain a backported patch to correct this issue.

Topics%20covered

Topics Covered

security advisory moderate security update red hat enterprise linux systemtap divide-by-zero

References

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

Package List

Red Hat Enterprise Linux Desktop (v. 5 client):
Source:
i386: systemtap-1.3-4.el5_6.1.i386.rpm systemtap-client-1.3-4.el5_6.1.i386.rpm systemtap-debuginfo-1.3-4.el5_6.1.i386.rpm systemtap-initscript-1.3-4.el5_6.1.i386.rpm systemtap-runtime-1.3-4.el5_6.1.i386.rpm systemtap-sdt-devel-1.3-4.el5_6.1.i386.rpm systemtap-server-1.3-4.el5_6.1.i386.rpm systemtap-testsuite-1.3-4.el5_6.1.i386.rpm
x86_64: systemtap-1.3-4.el5_6.1.x86_64.rpm systemtap-client-1.3-4.el5_6.1.x86_64.rpm systemtap-debuginfo-1.3-4.el5_6.1.i386.rpm systemtap-debuginfo-1.3-4.el5_6.1.x86_64.rpm systemtap-initscript-1.3-4.el5_6.1.x86_64.rpm systemtap-runtime-1.3-4.el5_6.1.x86_64.rpm systemtap-sdt-devel-1.3-4.el5_6.1.i386.rpm systemtap-sdt-devel-1.3-4.el5_6.1.x86_64.rpm systemtap-server-1.3-4.el5_6.1.x86_64.rpm systemtap-testsuite-1.3-4.el5_6.1.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source:
i386: systemtap-1.3-4.el5_6.1.i386.rpm systemtap-client-1.3-4.el5_6.1.i386.rpm systemtap-debuginfo-1.3-4.el5_6.1.i386.rpm systemtap-initscript-1.3-4.el5_6.1.i386.rpm systemtap-runtime-1.3-4.el5_6.1.i386.rpm systemtap-sdt-devel-1.3-4.el5_6.1.i386.rpm systemtap-server-1.3-4.el5_6.1.i386.rpm systemtap-testsuite-1.3-4.el5_6.1.i386.rpm
ia64: systemtap-1.3-4.el5_6.1.ia64.rpm systemtap-client-1.3-4.el5_6.1.ia64.rpm

Read the Full Advisory


Advisory ID: RHSA-2011:0841-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2011:0841.html
Issue date: 2011-05-31

Topic

Updated systemtap packages that fix one security issue are now availablefor Red Hat Enterprise Linux 5.The Red Hat Security Response Team has rated this update as having moderatesecurity impact. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available from the CVE link inthe References section.

Topics%20covered

Topics Covered

security advisory moderate security update red hat enterprise linux systemtap divide-by-zero

Relevant Releases Architectures

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64

Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64

Bugs Fixed

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

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