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Vulnerability Details : CVE-2014-1895

Off-by-one error in the flask_security_avc_cachestats function in xsm/flask/flask_op.c in Xen 4.2.x and 4.3.x, when the maximum number of physical CPUs are in use, allows local users to cause a denial of service (host crash) or obtain sensitive information from hypervisor memory by leveraging a FLASK_AVC_CACHESTAT hypercall, which triggers a buffer over-read.
Publish Date : 2014-04-01 Last Update Date : 2014-04-19
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- CVSS Scores & Vulnerability Types

CVSS Score
5.8
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Single system (The vulnerability requires an attacker to be logged into the system (such as at a command line or via a desktop session or web interface).)
Gained Access None
Vulnerability Type(s) Denial Of ServiceObtain Information
CWE ID 189

- Related OVAL Definitions

Title Definition Id Class Family
SUSE-SU-2014:0373-1 -- Security update for Xen oval:org.mitre.oval:def:25390 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2014-1895

# Product Type Vendor Product Version Update Edition Language
1 OS XEN XEN 4.2.0 Version Details Vulnerabilities
2 OS XEN XEN 4.2.1 Version Details Vulnerabilities
3 OS XEN XEN 4.2.2 Version Details Vulnerabilities
4 OS XEN XEN 4.2.3 Version Details Vulnerabilities
5 OS XEN XEN 4.3.0 Version Details Vulnerabilities
6 OS XEN XEN 4.3.1 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
XEN XEN 6

- References For CVE-2014-1895

http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00011.html
SUSE SUSE-SU-2014:0373
http://xenbits.xen.org/xsa/advisory-85.html CONFIRM
http://www.openwall.com/lists/oss-security/2014/02/10/6
MLIST [oss-security] 20140210 Xen Security Advisory 85 (CVE-2014-1895) - Off-by-one error in FLASK_AVC_CACHESTAT hypercall
http://www.openwall.com/lists/oss-security/2014/02/07/12
MLIST [oss-security] 20140207 Re: Xen Security Advisory 84 - integer overflow in several XSM/Flask hypercalls

- Metasploit Modules Related To CVE-2014-1895

There are not any metasploit modules related to this vulnerability (Please visit www.metasploit.com for more information)


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