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Last updated: 7/30/2014 5:13:36 PM

CVE Publication rate: 21.53

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Vulnerability Summary for CVE-2014-1895

Original release date: 04/01/2014
Last revised: 04/19/2014
Source: US-CERT/NIST

Overview

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.

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score: 5.8 (MEDIUM) (AV:A/AC:M/Au:S/C:P/I:N/A:C) (legend)
Impact Subscore: 7.8
Exploitability Subscore: 4.4
CVSS Version 2 Metrics:
Access Vector: Local network exploitable
Access Complexity: Medium
Authentication: Required to exploit
Impact Type: Allows unauthorized disclosure of information; Allows disruption of service

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External Source: SUSE
Name: SUSE-SU-2014:0373
External Source: MLIST
Name: [oss-security] 20140207 Re: Xen Security Advisory 84 - integer overflow in several XSM/Flask hypercalls
External Source: MLIST
Name: [oss-security] 20140210 Xen Security Advisory 85 (CVE-2014-1895) - Off-by-one error in FLASK_AVC_CACHESTAT hypercall
External Source: CONFIRM
Name: http://xenbits.xen.org/xsa/advisory-85.html
Type: Advisory; Patch Information

Technical Details

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