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RHEL 5 RHSA-2010:0633-01 High: qspice DoS and Privilege Escalation

red hat
Calendar Grey August 19, 2010
Dist Redhat Esm H88
Crucial patch for qspice resolves significant vulnerabilities in RHEL 5, addressing denial of service threats and preventing privilege exploitation.
Updated qspice packages that fix two security issues 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

Summary

The Simple Protocol for Independent Computing Environments (SPICE) is a remote display protocol used in Red Hat Enterprise Linux for viewing virtualized guests running on the Kernel-based Virtual Machine (KVM) hypervisor, or on Red Hat Enterprise Virtualization Hypervisor.
It was found that the libspice component of QEMU-KVM on the host did not validate all pointers provided from a guest system's QXL graphics card driver. A privileged guest user could use this flaw to cause the host to dereference an invalid pointer, causing the guest to crash (denial of service) or, possibly, resulting in the privileged guest user escalating their privileges on the host. (CVE-2010-0428)
It was found that the libspice component of QEMU-KVM on the host could be forced to perform certain memory management operations on memory addresses controlled by a guest. A privileged guest user could use this flaw to crash the guest (denial of service) or, possibly, escalate their privileges on the host. (CVE-2010-0429)
All qspice users should upgrade to these updated packages, which contain backported patches to correct these issues.

Topics%20covered

Topics Covered

security advisory security update privilege escalation DoS important RHEL qspice

References

https://access.redhat.com/security/cve/CVE-2010-0428 https://access.redhat.com/security/cve/CVE-2010-0429 https://access.redhat.com/security/updates/classification#important

Package List

RHEL Desktop Multi OS (v. 5 client):
Source:
x86_64: qspice-0.3.0-54.el5_5.2.x86_64.rpm qspice-debuginfo-0.3.0-54.el5_5.2.x86_64.rpm qspice-libs-0.3.0-54.el5_5.2.x86_64.rpm qspice-libs-devel-0.3.0-54.el5_5.2.x86_64.rpm
RHEL Virtualization (v. 5 server):
Source:
x86_64: qspice-0.3.0-54.el5_5.2.x86_64.rpm qspice-debuginfo-0.3.0-54.el5_5.2.x86_64.rpm qspice-libs-0.3.0-54.el5_5.2.x86_64.rpm qspice-libs-devel-0.3.0-54.el5_5.2.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


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2010:0633-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2010:0633.html
Issue date: 2010-08-19

Topic

Updated qspice packages that fix two security issues are now available forRed Hat Enterprise Linux 5.The Red Hat Security Response Team has rated this update as havingimportant security impact. Common Vulnerability Scoring System (CVSS) basescores, which give detailed severity ratings, are available for eachvulnerability from the CVE links in the References section.

Topics%20covered

Topics Covered

security advisory security update privilege escalation DoS important RHEL qspice

Relevant Releases Architectures

RHEL Desktop Multi OS (v. 5 client) - x86_64

RHEL Virtualization (v. 5 server) - x86_64

Bugs Fixed

568699 - CVE-2010-0428 libspice: Insufficient guest provided pointers validation

568701 - CVE-2010-0429 libspice: Relying on guest provided data structures to indicate memory allocation

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