Debian DSA-3390-1 : xen - security update

high Nessus Plugin ID 86700

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Synopsis

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

Description

It was discovered that the code to validate level 2 page table entries is bypassed when certain conditions are satisfied. A malicious PV guest administrator can take advantage of this flaw to gain privileges via a crafted superpage mapping.

Solution

Upgrade the xen packages.

For the oldstable distribution (wheezy), this problem has been fixed in version 4.1.4-3+deb7u9.

For the stable distribution (jessie), this problem has been fixed in version 4.4.1-9+deb8u2.

Plugin Details

Severity: High

ID: 86700

File Name: debian_DSA-3390.nasl

Version: 2.6

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 11/3/2015

Updated: 1/11/2021

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.5

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:xen, cpe:/o:debian:debian_linux:8.0, 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: 11/2/2015

Reference Information

CVE: CVE-2015-7835

DSA: 3390

Detections

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