Debian DSA-2662-1 : xen - several vulnerabilities

medium Nessus Plugin ID 66028
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Synopsis

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

Description

Multiple vulnerabilities have been discovered in the Xen hypervisor.
The Common Vulnerabilities and Exposures project identifies the following problems :

- CVE-2013-1917 The SYSENTER instruction can be used by PV guests to accelerate system call processing. This instruction, however, leaves the EFLAGS register mostly unmodified.
This can be used by malicious or buggy user space to cause the entire host to crash.

- CVE-2013-1919 Various IRQ related access control operations may not have the intended effect, potentially permitting a stub domain to grant its client domain access to an IRQ it doesn't have access to itself. This can be used by malicious or buggy stub domains kernels to mount a denial of service attack possibly affecting the whole system.

Solution

Upgrade the xen packages.

For the stable distribution (squeeze), these problems have been fixed in version 4.0.1-5.9.

See Also

https://security-tracker.debian.org/tracker/CVE-2013-1917

https://security-tracker.debian.org/tracker/CVE-2013-1919

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

https://www.debian.org/security/2013/dsa-2662

Plugin Details

Severity: Medium

ID: 66028

File Name: debian_DSA-2662.nasl

Version: 1.12

Type: local

Agent: unix

Published: 4/19/2013

Updated: 1/11/2021

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 4

CVSS v2

Risk Factor: Medium

Base Score: 4.7

Vector: AV:L/AC:M/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

Patch Publication Date: 4/18/2013

Reference Information

CVE: CVE-2013-1917, CVE-2013-1919

DSA: 2662