Scientific Linux Security Update : xen on SL5.x i386/x86_64 (20120905)

high Nessus Plugin ID 61796
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Synopsis

The remote Scientific Linux host is missing one or more security updates.

Description

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

A flaw was found in the way QEMU handled VT100 terminal escape sequences when emulating certain character devices. A guest user with privileges to write to a character device that is emulated on the host using a virtual console back-end could use this flaw to crash the qemu process on the host or, possibly, escalate their privileges on the host. (CVE-2012-3515)

This flaw did not affect the default use of the Xen hypervisor implementation in Red Hat Enterprise Linux 5. This problem only affected fully-virtualized guests that have a serial or parallel device that uses a virtual console (vc) back-end. By default, the virtual console back-end is not used for such devices; only guests explicitly configured to use them in this way were affected.

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

Solution

Update the affected xen, xen-devel and / or xen-libs packages.

See Also

http://www.nessus.org/u?91e23c76

Plugin Details

Severity: High

ID: 61796

File Name: sl_20120905_xen_on_SL5_x.nasl

Version: 1.7

Type: local

Agent: unix

Published: 9/6/2012

Updated: 1/14/2021

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 6

CVSS v2

Risk Factor: High

Base Score: 7.2

Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C

Vulnerability Information

CPE: p-cpe:/a:fermilab:scientific_linux:xen, p-cpe:/a:fermilab:scientific_linux:xen-devel, p-cpe:/a:fermilab:scientific_linux:xen-libs, x-cpe:/o:fermilab:scientific_linux

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

Patch Publication Date: 9/5/2012

Vulnerability Publication Date: 11/23/2012

Reference Information

CVE: CVE-2012-3515