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RHEL 5 : hypervkvpd (RHSA-2013:0807)

medium Nessus Plugin ID 66370

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Synopsis

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

Description

An updated hypervkvpd package that fixes one security issue and one bug is now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having low 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 hypervkvpd package contains hypervkvpd, the guest Microsoft Hyper-V Key-Value Pair (KVP) daemon. The daemon passes basic information to the host through VMBus, such as the guest IP address, fully qualified domain name, operating system name, and operating system release number.

A denial of service flaw was found in the way hypervkvpd processed certain Netlink messages. A local, unprivileged user in a guest (running on Microsoft Hyper-V) could send a Netlink message that, when processed, would cause the guest's hypervkvpd daemon to exit.
(CVE-2012-5532)

The CVE-2012-5532 issue was discovered by Florian Weimer of the Red Hat Product Security Team.

This update also fixes the following bug :

* The hypervkvpd daemon did not close the file descriptors for pool files when they were updated. This could eventually lead to hypervkvpd crashing with a 'KVP: Failed to open file, pool: 1' error after consuming all available file descriptors. With this update, the file descriptors are closed, correcting this issue. (BZ#953502)

Users of hypervkvpd are advised to upgrade to this updated package, which contains backported patches to correct these issues. After installing the update, it is recommended to reboot all guest machines.

Solution

Update the affected hypervkvpd and / or hypervkvpd-debuginfo packages.

See Also

https://access.redhat.com/errata/RHSA-2013:0807

https://access.redhat.com/security/cve/cve-2012-5532

Plugin Details

Severity: Medium

ID: 66370

File Name: redhat-RHSA-2013-0807.nasl

Version: 1.11

Type: local

Agent: unix

Published: 5/10/2013

Updated: 1/14/2021

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

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 3.6

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

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:hypervkvpd, cpe:/o:redhat:enterprise_linux:5, p-cpe:/a:redhat:enterprise_linux:hypervkvpd-debuginfo, cpe:/o:redhat:enterprise_linux:5.9

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/9/2013

Reference Information

CVE: CVE-2012-5532

BID: 56710

RHSA: 2013:0807