Debian DSA-3038-1 : libvirt - security update

medium Nessus Plugin ID 77921

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Synopsis

The remote Debian host is missing a security-related update.

Description

Several vulnerabilities were discovered in Libvirt, a virtualisation abstraction library. The Common Vulnerabilities and Exposures project identifies the following problems :

- CVE-2014-0179 Richard Jones and Daniel P. Berrange found that libvirt passes the XML_PARSE_NOENT flag when parsing XML documents using the libxml2 library, in which case all XML entities in the parsed documents are expanded. A user able to force libvirtd to parse an XML document with an entity pointing to a special file that blocks on read access could use this flaw to cause libvirtd to hang indefinitely, resulting in a denial of service on the system.

- CVE-2014-3633 Luyao Huang of Red Hat found that the qemu implementation of virDomainGetBlockIoTune computed an index into the array of disks for the live definition, then used it as the index into the array of disks for the persistent definition, which could result into an out-of-bounds read access in qemuDomainGetBlockIoTune().

A remote attacker able to establish a read-only connection to libvirtd could use this flaw to crash libvirtd or, potentially, leak memory from the libvirtd process.

Solution

Upgrade the libvirt packages.

For the stable distribution (wheezy), these problems have been fixed in version 0.9.12.3-1+deb7u1.

Plugin Details

Severity: Medium

ID: 77921

File Name: debian_DSA-3038.nasl

Version: 1.7

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 9/29/2014

Updated: 1/11/2021

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 5

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:libvirt, cpe:/o:debian:debian_linux:7.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 9/27/2014

Reference Information

CVE: CVE-2014-0179, CVE-2014-3633

BID: 67289

DSA: 3038

Detections

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