SB2016122106 - SUSE Linux update for xen
Published: December 21, 2016
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 secuirty vulnerabilities.
1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2016-10013)
The vulnerability allows a local authenticated user to execute arbitrary code.
Xen through 4.8.x allows local 64-bit x86 HVM guest OS users to gain privileges by leveraging mishandling of SYSCALL singlestep during emulation.
2) Input validation error (CVE-ID: CVE-2016-10024)
The vulnerability allows a local privileged user to a crash the entire system.
Xen through 4.8.x allows local x86 PV guest OS kernel administrators to cause a denial of service (host hang or crash) by modifying the instruction stream asynchronously while performing certain kernel operations.
3) NULL pointer dereference (CVE-ID: CVE-2016-10025)
The vulnerability allows a local authenticated user to perform a denial of service (DoS) attack.
VMFUNC emulation in Xen 4.6.x through 4.8.x on x86 systems using AMD virtualization extensions (aka SVM) allows local HVM guest OS users to cause a denial of service (hypervisor crash) by leveraging a missing NULL pointer check.
4) Information disclosure (CVE-ID: CVE-2016-9932)
The vulnerability allows a local authenticated user to gain access to sensitive information.
CMPXCHG8B emulation in Xen 3.3.x through 4.7.x on x86 systems allows local HVM guest OS users to obtain sensitive information from host stack memory via a "supposedly-ignored" operand size prefix.
Remediation
Install update from vendor's website.