Vulnerability identifier: #VU16560

Vulnerability risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-20123

CWE-ID: CWE-401

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 vulnerability exists due to memory leakage issue in the way QEMU initialised its VMWare's paravirtual RDMA device. An adjacent attacker can cause pvrdma_realize() routine not to release memory resources allocated to various objects and leak host memory, resulting in DoS for host.

Mitigation
Install update from vendor's website.

Vulnerable software versions

QEMU: 0.1 - 3.0.0

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External links
http://lists.gnu.org/archive/html/qemu-devel/2018-12/msg02817.html

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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.