SecurityTracker.com
    Home    |    View Topics    |    Search    |    Contact Us    |   

SecurityTracker
Archives


 


Category:   Application (Generic)  >   QEMU Vendors:   QEMU.org
(Oracle Issues Fix for Oracle Linux for QEMU) Xen Qemu VGA Module Bugs Let Local Users on the Guest Deny Service on the Guest or Gain Elevated Privileges on the Host System
SecurityTracker Alert ID:  1036607
SecurityTracker URL:  http://securitytracker.com/id/1036607
CVE Reference:   CVE-2016-3712   (Links to External Site)
Date:  Aug 12 2016
Impact:   Denial of service via network, User access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   Two vulnerabilities were reported in Xen. A local user on the guest system can cause denial of service conditions on the guest system. A local user on the guest system can gain elevated privileges on the host system. QEMU is affected.

A privileged local user on the guest system can exploit a flaw in the Qemu VGA module to modify memory access modes and potentially execute arbitrary code with the privileges of the Qemu process [CVE-2016-3710].

A local user on the guest system can exploit a flaw in the Qemu VGA module to edit certain registers and trigger an out-of-bounds memory read error or integer overflow and cause denial of service conditions on the guest system [CVE-2016-3712].

Systems running on x86 with HVM guests with the qemu process running in dom0 are affected.

ARM systems are not affected.

Systems running only PV guests are not affected.

"Wei Xiao and Qinghao Tang of 360 Marvel Team" of 360.cn Inc. and Zuozhi Fzz of Alibaba Inc. reported these vulnerabilities.

Impact:   A local user on the guest system can cause denial of service conditions on the guest system.

A local user on the guest system can gain elevated privileges on the host system.

Solution:   Oracle has issued a fix for CVE-2016-3712 for QEMU.

The Oracle Linux advisory is available at:

http://linux.oracle.com/errata/ELSA-2016-1606.html

Vendor URL:  linux.oracle.com/errata/ELSA-2016-1606.html (Links to External Site)
Cause:   Access control error, Boundary error
Underlying OS:  Linux (Oracle)
Underlying OS Comments:  7

Message History:   This archive entry is a follow-up to the message listed below.
May 9 2016 Xen Qemu VGA Module Bugs Let Local Users on the Guest Deny Service on the Guest or Gain Elevated Privileges on the Host System



 Source Message Contents

Subject:  [El-errata] ELSA-2016-1606 Moderate: Oracle Linux 7 qemu-kvm security update

Oracle Linux Security Advisory ELSA-2016-1606

http://linux.oracle.com/errata/ELSA-2016-1606.html

The following updated rpms for Oracle Linux 7 have been uploaded to the 
Unbreakable Linux Network:

x86_64:
libcacard-1.5.3-105.el7_2.7.i686.rpm
libcacard-1.5.3-105.el7_2.7.x86_64.rpm
libcacard-devel-1.5.3-105.el7_2.7.i686.rpm
libcacard-devel-1.5.3-105.el7_2.7.x86_64.rpm
libcacard-tools-1.5.3-105.el7_2.7.x86_64.rpm
qemu-img-1.5.3-105.el7_2.7.x86_64.rpm
qemu-kvm-1.5.3-105.el7_2.7.x86_64.rpm
qemu-kvm-common-1.5.3-105.el7_2.7.x86_64.rpm
qemu-kvm-tools-1.5.3-105.el7_2.7.x86_64.rpm


SRPMS:
http://oss.oracle.com/ol7/SRPMS-updates/qemu-kvm-1.5.3-105.el7_2.7.src.rpm



Description of changes:

[1.5.3-105.el7_2.7]
- kvm-block-iscsi-avoid-potential-overflow-of-acb-task-cdb.patch 
[bz#1358996]
- Resolves: bz#1358996
   (CVE-2016-5126 qemu-kvm: Qemu: block: iscsi: buffer overflow in 
iscsi_aio_ioctl [rhel-7.2.z])

[1.5.3-105.el7_2.6]
- kvm-virtio-error-out-if-guest-exceeds-virtqueue-size.patch [bz#1359728]
- Resolves: bz#1359728
   (EMBARGOED CVE-2016-5403 qemu-kvm: Qemu: virtio: unbounded memory 
allocation on host via guest leading to DoS [rhel-7.2.z])

[1.5.3-105.el7_2.5]
- kvm-vga-add-sr_vbe-register-set.patch [bz#1347527]
- Resolves: bz#1347527
   (Regression from CVE-2016-3712: windows installer fails to start)


_______________________________________________
El-errata mailing list
El-errata@oss.oracle.com
https://oss.oracle.com/mailman/listinfo/el-errata
 
 


Go to the Top of This SecurityTracker Archive Page





Home   |    View Topics   |    Search   |    Contact Us

This web site uses cookies for web analytics. Learn More

Copyright 2021, SecurityGlobal.net LLC