Vulnerability identifier: #VU14217

Vulnerability risk: High

CVSSv3.1: 9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2017-15118

CWE-ID: CWE-121

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
QEMU
Client/Desktop applications / Virtualization software

Vendor: QEMU

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists in the network block device (NBD) server implementation due to stack-based buffer overflow when handling malicious input. A remote unauthenticated attacker can send a large export-name request, trigger memory corruption and cause the service to crash or execute arbitrary code with elevated privileges.

Mitigation
Update to version 2.11 or later.

Vulnerable software versions

QEMU: 2.0 - 2.10.2

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External links
http://git.qemu.org/?p=qemu.git&a=commit&h=f37708f6b8

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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 Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.