SB2014102307 - Permissions, Privileges, and Access Controls in xen (Alpine package)
Published: October 23, 2014
Security Bulletin ID
SB2014102307
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Adjecent network
Highest impact
Denial of service
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-2014-7156)
The vulnerability allows a remote non-authenticated attacker to perform service disruption.
The x86_emulate function in arch/x86/x86_emulate/x86_emulate.c in Xen 3.3.x through 4.4.x does not check the supervisor mode permissions for instructions that generate software interrupts, which allows local HVM guest users to cause a denial of service (guest crash) via unspecified vectors.
Remediation
Install update from vendor's website.