Vulnerability identifier: #VU14205

Vulnerability risk: High

CVSSv3.1: 7.8 [CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-2630

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 authenticated attacker to execute arbitrary code on the target system.

The vulnerability exists in Quick Emulator (QEMU) configured with network block device (NBD) client support due to improper processing of an NBD server's response to an NBD_OPT_LIST request sent from an affected NBD client. A remote attacker can trick the user on an NBD client into sending an NBD_OPT_LIST request to the attacker-controlled NBD serverб trigger stack-based buffer overflow and cause the service to crash or execute arbitrary code on the targeted NBD client with elevated privileges.

Mitigation
Update to version 2.9 or later.

Vulnerable software versions

QEMU: 2.0 - 2.8.1.1

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External links
http://lists.gnu.org/archive/html/qemu-devel/2017-03/msg01455.html

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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 Internet.

Is there known malware, which exploits this vulnerability?

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