Debian DSA-2337-1 : xen - several vulnerabilities

high Nessus Plugin ID 56716
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Synopsis

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

Description

Several vulnerabilities were discovered in the Xen virtual machine hypervisor.

- CVE-2011-1166 A 64-bit guest can get one of its vCPUs into non-kernel mode without first providing a valid non-kernel pagetable, thereby locking up the host system.

- CVE-2011-1583, CVE-2011-3262 Local users can cause a denial of service and possibly execute arbitrary code via a crafted paravirtualised guest kernel image.

- CVE-2011-1898 When using PCI passthrough on Intel VT-d chipsets that do not have interrupt remapping, guest OS users can gain host OS privileges by writing to the interrupt injection registers.

The oldstable distribution (lenny) contains a different version of Xen not affected by these problems.

Solution

Upgrade the xen packages.

For the stable distribution (squeeze), this problem has been fixed in version 4.0.1-4.

See Also

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

https://security-tracker.debian.org/tracker/CVE-2011-1166

https://security-tracker.debian.org/tracker/CVE-2011-1583

https://security-tracker.debian.org/tracker/CVE-2011-3262

https://security-tracker.debian.org/tracker/CVE-2011-1898

https://www.debian.org/security/2011/dsa-2337

Plugin Details

Severity: High

ID: 56716

File Name: debian_DSA-2337.nasl

Version: 1.14

Type: local

Agent: unix

Published: 11/7/2011

Updated: 1/11/2021

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 6

CVSS v2

Risk Factor: High

Base Score: 7.4

Temporal Score: 5.5

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

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

Vulnerability Information

CPE: cpe:2.3:o:debian:debian_linux:6.0:*:*:*:*:*:*:*, p-cpe:2.3:a:debian:debian_linux:xen:*:*:*:*:*:*:*

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

Exploit Ease: No known exploits are available

Patch Publication Date: 11/6/2011

Reference Information

CVE: CVE-2011-1898, CVE-2011-1166, CVE-2011-1583, CVE-2011-3262

BID: 48515, 48058, 47779

DSA: 2337