Vulnerability identifier: #VU10940

Vulnerability risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-18030

CWE-ID: CWE-125

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
QEMU
Client/Desktop applications / Virtualization software

Vendor: QEMU

Description
The vulnerability allows an adjacent attacker to cause DoS condition on the target system.

The weakness exists in the cirrus_invalidate_region function in hw/display/cirrus_vga.c due to out-of-bounds read. A remote attacker can use vectors related to negative pitch, trigger memory error and cause QEMU process to crash.

Mitigation
Install update from vendor's website.

Vulnerable software versions

QEMU: All versions

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External links
http://git.qemu.org/?p=qemu.git;a=commit;h=f153b563f8cf121aebf5a2fff5f0110faf58ccb3

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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