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RHEL 5 : xen (RHSA-2015:1002) (Venom)

high Nessus Plugin ID 83429

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Synopsis

The remote Red Hat host is missing one or more security updates.

Description

Updated xen packages that fix one security issue are now available for Red Hat Enterprise Linux 5.

Red Hat Product Security has rated this update as having Important security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

The xen packages contain administration tools and the xend service for managing the kernel-xen kernel for virtualization on Red Hat Enterprise Linux.

An out-of-bounds memory access flaw was found in the way QEMU's virtual Floppy Disk Controller (FDC) handled FIFO buffer access while processing certain FDC commands. A privileged guest user could use this flaw to crash the guest or, potentially, execute arbitrary code on the host with the privileges of the host's QEMU process corresponding to the guest. (CVE-2015-3456)

Red Hat would like to thank Jason Geffner of CrowdStrike for reporting this issue.

All xen users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. After installing the updated packages, all running fully-virtualized guests must be restarted for this update to take effect.

Solution

Update the affected packages.

See Also

https://access.redhat.com/errata/RHSA-2015:1002

https://access.redhat.com/security/cve/cve-2015-3456

Plugin Details

Severity: High

ID: 83429

File Name: redhat-RHSA-2015-1002.nasl

Version: 2.19

Type: local

Agent: unix

Published: 5/13/2015

Updated: 9/28/2023

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: High

Score: 8.1

CVSS v2

Risk Factor: High

Base Score: 7.7

Temporal Score: 6.4

Vector: CVSS2#AV:A/AC:L/Au:S/C:C/I:C/A:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:xen-debuginfo, cpe:/o:redhat:enterprise_linux:5, p-cpe:/a:redhat:enterprise_linux:xen-devel, p-cpe:/a:redhat:enterprise_linux:xen, p-cpe:/a:redhat:enterprise_linux:xen-libs

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/13/2015

Exploitable With

Core Impact

Reference Information

CVE: CVE-2015-3456

IAVA: 2015-A-0115-S

RHSA: 2015:1002