(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
(Links to External Site)
Date: Aug 12 2016
Denial of service via network, User access via local system|
Fix Available: Yes Vendor Confirmed: Yes |
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.
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.
Oracle has issued a fix for CVE-2016-3712 for QEMU.|
The Oracle Linux advisory is available at:
Vendor URL: linux.oracle.com/errata/ELSA-2016-1606.html (Links to External Site)
Access control error, Boundary error|
|Underlying OS: Linux (Oracle)|
|Underlying OS Comments: 7|
This archive entry is a follow-up to the message listed below.|
Source Message Contents
Subject: [El-errata] ELSA-2016-1606 Moderate: Oracle Linux 7 qemu-kvm security update|
Oracle Linux Security Advisory ELSA-2016-1606
The following updated rpms for Oracle Linux 7 have been uploaded to the
Unbreakable Linux Network:
Description of changes:
- Resolves: bz#1358996
(CVE-2016-5126 qemu-kvm: Qemu: block: iscsi: buffer overflow in
- 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])
- kvm-vga-add-sr_vbe-register-set.patch [bz#1347527]
- Resolves: bz#1347527
(Regression from CVE-2016-3712: windows installer fails to start)
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