SB2017012308 - Permissions, Privileges, and Access Controls in Xen
Published: January 23, 2017 Updated: July 28, 2020
Security Bulletin ID
SB2017012308
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) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2016-9382)
The vulnerability allows a local authenticated user to execute arbitrary code.
Xen 4.0.x through 4.7.x mishandle x86 task switches to VM86 mode, which allows local 32-bit x86 HVM guest OS users to gain privileges or cause a denial of service (guest OS crash) by leveraging a guest operating system that uses hardware task switching and allows a new task to start in VM86 mode.
Remediation
Install update from vendor's website.