CVE-2016-9603 Memory corruption in Qemu:
A heap buffer overflow in QEMU's Cirrus VGA emulator allows guest users to crash the host or execute arbitrary code.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2016-9603?
CVE-2016-9603 is a medium-severity memory corruption vulnerability in Citrix Xenserver, published on 27 Jul 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A heap buffer overflow flaw was found in QEMU's Cirrus CLGD 54xx VGA emulator's VNC display driver support before 2.9; the issue could occur when a VNC client attempted to update its display after a VGA operation is performed by a guest. A privileged user/process inside a guest could use this flaw to crash the QEMU process or, potentially, execute arbitrary code on the host with privileges of the QEMU process.
Which versions are affected by CVE-2016-9603?
It affects 9 products.
Linux distribution packages (25)
qemu-img Red Hat:enterprise_linux:7::client | All versions | 10:1.5.3-126.el7_3.6 |
qemu-kvm Red Hat:enterprise_linux:7::client | All versions | 10:1.5.3-126.el7_3.6 |
qemu-kvm-common Red Hat:enterprise_linux:7::client | All versions | 10:1.5.3-126.el7_3.6 |
qemu-kvm-debuginfo Red Hat:enterprise_linux:7::client | All versions | 10:1.5.3-126.el7_3.6 |
qemu-kvm-tools Red Hat:enterprise_linux:7::client | All versions | 10:1.5.3-126.el7_3.6 |
qemu-img Red Hat:enterprise_linux:7::computenode | All versions | 10:1.5.3-126.el7_3.6 |
qemu-kvm Red Hat:enterprise_linux:7::computenode | All versions | 10:1.5.3-126.el7_3.6 |
qemu-kvm-common Red Hat:enterprise_linux:7::computenode | All versions | 10:1.5.3-126.el7_3.6 |
qemu-kvm-debuginfo Red Hat:enterprise_linux:7::computenode | All versions | 10:1.5.3-126.el7_3.6 |
qemu-kvm-tools Red Hat:enterprise_linux:7::computenode | All versions | 10:1.5.3-126.el7_3.6 |
qemu-img-rhev Red Hat:enterprise_linux:7::hypervisor | All versions | 10:2.6.0-28.el7_3.9 |
qemu-kvm-common-rhev Red Hat:enterprise_linux:7::hypervisor | All versions | 10:2.6.0-28.el7_3.9 |
qemu-kvm-rhev Red Hat:enterprise_linux:7::hypervisor | All versions | 10:2.6.0-28.el7_3.9 |
qemu-kvm-rhev-debuginfo Red Hat:enterprise_linux:7::hypervisor | All versions | 10:2.6.0-28.el7_3.9 |
qemu-kvm-tools-rhev Red Hat:enterprise_linux:7::hypervisor | All versions | 10:2.6.0-28.el7_3.9 |
qemu-img Red Hat:enterprise_linux:7::server | All versions | 10:1.5.3-126.el7_3.6 |
qemu-kvm Red Hat:enterprise_linux:7::server | All versions | 10:1.5.3-126.el7_3.6 |
qemu-kvm-common Red Hat:enterprise_linux:7::server | All versions | 10:1.5.3-126.el7_3.6 |
qemu-kvm-debuginfo Red Hat:enterprise_linux:7::server | All versions | 10:1.5.3-126.el7_3.6 |
qemu-kvm-tools Red Hat:enterprise_linux:7::server | All versions | 10:1.5.3-126.el7_3.6 |
qemu-img Red Hat:enterprise_linux:7::workstation | All versions | 10:1.5.3-126.el7_3.6 |
qemu-kvm Red Hat:enterprise_linux:7::workstation | All versions | 10:1.5.3-126.el7_3.6 |
qemu-kvm-common Red Hat:enterprise_linux:7::workstation | All versions | 10:1.5.3-126.el7_3.6 |
qemu-kvm-debuginfo Red Hat:enterprise_linux:7::workstation | All versions | 10:1.5.3-126.el7_3.6 |
qemu-kvm-tools Red Hat:enterprise_linux:7::workstation | All versions | 10:1.5.3-126.el7_3.6 |
Products include Citrix Xenserver, Debian Debian Linux, Qemu Qemu, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Server Aus and 3 more.
How do I fix CVE-2016-9603?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2016-9603 being exploited?
There is no known exploitation of CVE-2016-9603 in the wild and no public exploit code.
Other vulnerabilities in Citrix Xenserver
Sources
Also known as ALPINE-CVE-2016-9603, DEBIAN-CVE-2016-9603, GHSA-49mx-v59p-m55m, RHSA-2017:0985, RHSA-2017:0987, UBUNTU-CVE-2016-9603.