SB2016080208 - Improper access control in Xen
Published: August 2, 2016 Updated: July 28, 2020
Security Bulletin ID
SB2016080208
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper access control (CVE-ID: CVE-2016-6258)
The vulnerability allows a local authenticated user to execute arbitrary code.
The PV pagetable code in arch/x86/mm.c in Xen 4.7.x and earlier allows local 32-bit PV guest OS administrators to gain host OS privileges by leveraging fast-paths for updating pagetable entries.
Remediation
Install update from vendor's website.
References
- http://support.citrix.com/article/CTX214954
- http://www.debian.org/security/2016/dsa-3633
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- http://www.securityfocus.com/bid/92131
- http://www.securitytracker.com/id/1036446
- http://xenbits.xen.org/xsa/advisory-182.html
- http://xenbits.xen.org/xsa/xsa182-4.5.patch
- http://xenbits.xen.org/xsa/xsa182-4.6.patch
- http://xenbits.xen.org/xsa/xsa182-unstable.patch
- https://security.gentoo.org/glsa/201611-09