RHSA-2010:0633 - Security Advisory

标题

Updated qspice packages that fix two security issues are now available for
Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having
important 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.

描述

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.

解决方案

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
http://kbase.redhat.com/faq/docs/DOC-11259

受影响的产品

• Red Hat Enterprise Linux Server 5 x86_64
• Red Hat Enterprise Linux Workstation 5 x86_64

修复

• BZ - 568699 - CVE-2010-0428 libspice: Insufficient guest provided pointers validation
• BZ - 568701 - CVE-2010-0429 libspice: Relying on guest provided data structures to indicate memory allocation

CVE

• CVE-2010-0428
• CVE-2010-0429

参考

• http://www.redhat.com/security/updates/classification/#important