Vulnerability identifier: #VU6939

Vulnerability risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-7980

CWE-ID: CWE-787

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
QEMU
Client/Desktop applications / Virtualization software

Vendor: QEMU

Description
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.

Mitigation
Update to version 2.9.0-r2.

Vulnerable software versions

QEMU: 0.1 - 2.9.0

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External links
http://git.qemu.org/?p=qemu.git;a=commitdiff;h=ffaf857778286ca54e3804432a2369a279e73aa7

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.