CVE-2017-7980: Buffer Overflow
Heap-based buffer overflow in Cirrus CLGD 54xx VGA Emulator in Quick Emulator (Qemu) 2.8 and earlier allows local guest OS users to execute arbitrary code or cause a denial of service (crash) via vectors related to a VNC client updating its display after a VGA operation.
Other sources
Quick emulator(Qemu) built with the Cirrus CLGD 54xx VGA Emulator support is vulnerable to an out-of-bounds r/w access issues. It could occur while copying VGA data via various bitblt functions.
A privileged user inside guest could use this flaw to crash the Qemu process resulting in DoS OR potentially execute arbitrary code on a host with privileges of Qemu process on the host.
Upstream patches: ----------------- -> http://git.qemu.org/?p=qemu.git;a=commitdiff;h=026aeffcb4752054830ba203020ed6eb05bcaba8 -> http://git.qemu.org/?p=qemu.git;a=commitdiff;h=ffaf857778286ca54e3804432a2369a279e73aa7
Reference: ---------- -> http://www.openwall.com/lists/oss-security/2017/04/21/1
— Red Hat
Affected Software
Remediation
Patch Available
Patch Available
Patch Available
Event History
Frequently Asked Questions
What is the severity of CVE-2017-7980?
CVE-2017-7980 is considered critical due to its potential to allow local users to execute arbitrary code or cause a denial of service.
How do I fix CVE-2017-7980?
To fix CVE-2017-7980, update QEMU to version 2.9 or later or apply vendor-specific patches if available.
Which systems are affected by CVE-2017-7980?
CVE-2017-7980 affects QEMU 2.8 and earlier, as well as various Ubuntu and Red Hat distributions running those versions.
What type of attack does CVE-2017-7980 enable?
CVE-2017-7980 enables a heap-based buffer overflow attack that can lead to arbitrary code execution.
Can CVE-2017-7980 be exploited remotely?
CVE-2017-7980 requires local access to the guest OS, so exploitation is not possible remotely.