Debian DLA-1181-1 : xen security update

High Nessus Plugin ID 104708

Synopsis

The remote Debian host is missing a security update.

Description

Multiple vulnerabilities have been discovered in the Xen hypervisor :

CVE-2017-15588

Jann Horn discovered a race condition that can cause a stale TLB entry which might result in privilege escalation, denial of service or information leak.

CVE-2017-15589

Roger Pau Monné discovered a hypervisor stack leak in the x86 I/O intercept code, resulting in information leaks.

CVE-2017-15592

Andrew Cooper discovered that incorrect handling of self-linear shadow mappings for translated guests might result in denial of service or privilege escalation.

CVE-2017-15593

Jan Beulich discovered that page type reference counts are mishandled which may result in denial of service.

CVE-2017-15595

Jann Horn discovered that crafted page-table stacking might result in denial of service, privilege escalation or information leaks.

For Debian 7 'Wheezy', these problems have been fixed in version 4.1.6.lts1-10.

We recommend that you upgrade your xen packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Upgrade the affected packages.

See Also

https://lists.debian.org/debian-lts-announce/2017/11/msg00027.html

https://packages.debian.org/source/wheezy/xen

Plugin Details

Severity: High

ID: 104708

File Name: debian_DLA-1181.nasl

Version: 3.3

Type: local

Agent: unix

Published: 2017/11/21

Updated: 2018/07/06

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.2

Temporal Score: 5.6

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

Temporal Vector: CVSS2#E:POC/RL:OF/RC:C

CVSS v3.0

Base Score: 8.8

Temporal Score: 7.9

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:libxen-4.1, p-cpe:/a:debian:debian_linux:libxen-dev, p-cpe:/a:debian:debian_linux:libxen-ocaml, p-cpe:/a:debian:debian_linux:libxen-ocaml-dev, p-cpe:/a:debian:debian_linux:libxenstore3.0, p-cpe:/a:debian:debian_linux:xen-docs-4.1, p-cpe:/a:debian:debian_linux:xen-hypervisor-4.1-amd64, p-cpe:/a:debian:debian_linux:xen-hypervisor-4.1-i386, p-cpe:/a:debian:debian_linux:xen-system-amd64, p-cpe:/a:debian:debian_linux:xen-system-i386, p-cpe:/a:debian:debian_linux:xen-utils-4.1, p-cpe:/a:debian:debian_linux:xen-utils-common, p-cpe:/a:debian:debian_linux:xenstore-utils, cpe:/o:debian:debian_linux:7.0

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2017/11/20

Reference Information

CVE: CVE-2017-15588, CVE-2017-15589, CVE-2017-15592, CVE-2017-15593, CVE-2017-15595