Debian DSA-2531-1 : xen - Denial of Service

medium Nessus Plugin ID 61578

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Synopsis

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

Description

Several denial-of-service vulnerabilities have been discovered in Xen, the popular virtualization software. The Common Vulnerabilities and Exposures project identifies the following issues :

- CVE-2012-3432 Guest mode unprivileged code, which has been granted the privilege to access MMIO regions, may leverage that access to crash the whole guest. Since this can be used to crash a client from within, this vulnerability is considered to have low impact.

- CVE-2012-3433 A guest kernel can cause the host to become unresponsive for a period of time, potentially leading to a DoS.
Since an attacker with full control in the guest can impact the host, this vulnerability is considered to have high impact.

Solution

Upgrade the xen packages.

For the stable distribution (squeeze), this problem has been fixed in version 4.0.1-5.3.

Plugin Details

Severity: Medium

ID: 61578

File Name: debian_DSA-2531.nasl

Version: 1.12

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 8/20/2012

Updated: 1/11/2021

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.5

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:debian:debian_linux:xen, cpe:/o:debian:debian_linux:6.0

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

Exploit Ease: No known exploits are available

Patch Publication Date: 8/18/2012

Reference Information

CVE: CVE-2012-3432, CVE-2012-3433

BID: 54691, 54942

DSA: 2531

Detections

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