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Red Hat: RHSA-2016-2963-01 Important: Xen Privilege Escalation

red hat
Calendar Grey December 20, 2016
Scroller Redhat
Enhancement for Red Hat Xen boosts defense measures; reduces risks of privilege escalation through critical patches.
An update for xen is now available for Red Hat Enterprise Linux 5

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Summary

Xen is a virtual machine monitor
Security Fix(es):
* An out of bounds array access issue was found in the Xen virtual machine monitor, built with the QEMU ioport support. It could occur while doing ioport read/write operations, if guest was to supply a 32bit address parameter. A privileged guest user/process could use this flaw to potentially escalate their privileges on a host. (CVE-2016-9637)
Red Hat would like to thank the Xen project for reporting this issue.

Topics%20covered

Topics Covered

security advisory security update Red Hat privilege escalation important Xen

References

https://access.redhat.com/security/cve/CVE-2016-9637 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Desktop (v. 5 client):
Source: xen-3.0.3-148.el5_11.src.rpm
i386: xen-debuginfo-3.0.3-148.el5_11.i386.rpm xen-libs-3.0.3-148.el5_11.i386.rpm
x86_64: xen-debuginfo-3.0.3-148.el5_11.i386.rpm xen-debuginfo-3.0.3-148.el5_11.x86_64.rpm xen-libs-3.0.3-148.el5_11.i386.rpm xen-libs-3.0.3-148.el5_11.x86_64.rpm
Red Hat Enterprise Linux Desktop Multi OS (v. 5 client):
Source: xen-3.0.3-148.el5_11.src.rpm
i386: xen-3.0.3-148.el5_11.i386.rpm xen-debuginfo-3.0.3-148.el5_11.i386.rpm xen-devel-3.0.3-148.el5_11.i386.rpm
x86_64: xen-3.0.3-148.el5_11.x86_64.rpm xen-debuginfo-3.0.3-148.el5_11.i386.rpm xen-debuginfo-3.0.3-148.el5_11.x86_64.rpm xen-devel-3.0.3-148.el5_11.i386.rpm xen-devel-3.0.3-148.el5_11.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source: xen-3.0.3-148.el5_11.src.rpm
i386: xen-debuginfo-3.0.3-148.el5_11.i386.rpm xen-libs-3.0.3-148.el5_11.i386.rpm
ia64: xen-debuginfo-3.0.3-148.el5_11.ia64.rpm xen-libs-3.0.3-148.el5_11.ia64.rpm
x86_64: xen-debuginfo-3.0.3-148.el5_11.i386.rpm xen-debuginfo-3.0.3-148.el5_11.x86_64.rpm xen-libs-3.0.3-148.el5_11.i386.rpm xen-libs-3.0.3-148.el5_11.x86_64.rpm
Red Hat Enterprise Linux Virtualization (v. 5 server):
Source: xen-3.0.3-148.el5_11.src.rpm
i386: xen-3.0.3-148.el5_11.i386.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2016:2963-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2016:2963.html
Issue date: 2016-12-20

Topic

An update for xen is now available for Red Hat Enterprise Linux 5.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory security update Red Hat privilege escalation important Xen

Relevant Releases Architectures

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

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

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

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

Bugs Fixed

1397043 - CVE-2016-9637 XSA199 Xen: qemu ioport out-of-bounds array access (XSA-199)

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