CVE-2016-9603: Buffer Overflow
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.
Other sources
Quick Emulator(Qemu) built with the Cirrus CLGD 54xx VGA Emulator and the VNC display driver support is vulnerable to a heap buffer overflow issue. It could occur when Vnc client attempts to update its display after a vga operation is performed by a guest.
A privileged user/process inside guest could use this flaw to crash the Qemu process resulting in DoS OR potentially leverage it to execute arbitrary code on the host with privileges of the Qemu process.
Reference: ---------- -> http://www.openwall.com/lists/oss-security/2017/03/14/2
— Red Hat
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2016-9603?
CVE-2016-9603 is classified as a high severity vulnerability due to the potential for remote code execution via a heap buffer overflow.
How do I fix CVE-2016-9603?
To fix CVE-2016-9603, upgrade QEMU to version 2.9 or later.
Which software is affected by CVE-2016-9603?
CVE-2016-9603 affects multiple versions of QEMU, Citrix XenServer, and Red Hat OpenStack among others.
Can CVE-2016-9603 be exploited remotely?
Yes, CVE-2016-9603 can be exploited remotely if a privileged user on a guest machine uses a VNC client to interact with the vulnerable VNC display driver.
What are the potential consequences of exploiting CVE-2016-9603?
Exploiting CVE-2016-9603 could allow an attacker to execute arbitrary code on the guest system, compromising its integrity.