Debian Security Advisory DSA 3633-1 (xen - security update)

Published: 2016-08-02 05:25:39
CVE Author: NIST National Vulnerability Database (NVD)

CVSS Base Vector:
AV:L/AC:L/Au:N/C:C/I:C/A:C

Solution Type:
Vendor Patch

Detection Type:
Linux Distribution Package

Affected Versions:
xen on Debian Linux

Recommendations:
For the stable distribution (jessie), these problems have been fixed in version 4.4.1-9+deb8u6. For the unstable distribution (sid), these problems will be fixed soon. We recommend that you upgrade your xen Linux Distribution Packages.

Summary:
Multiple vulnerabilities have been discovered in the Xen hypervisor. The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2015-8338 Julien Grall discovered that Xen on ARM was susceptible to denial of service via long running memory operations. CVE-2016-4480 Jan Beulich discovered that incorrect page table handling could result in privilege escalation inside a Xen guest instance. CVE-2016-4962 Wei Liu discovered multiple cases of missing input sanitising in libxl which could result in denial of service. CVE-2016-5242 Aaron Cornelius discovered that incorrect resource handling on ARM systems could result in denial of service. CVE-2016-6258 Jeremie Boutoille discovered that incorrect pagetable handling in PV instances could result in guest to host privilege escalation.

Detection Method:
This check tests the installed software version using the apt Linux Distribution Package manager.

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2015-8338
https://nvd.nist.gov/vuln/detail/CVE-2016-4480
https://nvd.nist.gov/vuln/detail/CVE-2016-4962
https://nvd.nist.gov/vuln/detail/CVE-2016-5242
https://nvd.nist.gov/vuln/detail/CVE-2016-6258

References:

http://www.debian.org/security/2016/dsa-3633.html

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Severity
High
CVSS Score
7.2

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