Denial of service in QEMU

Published: 2017-06-12 | Updated: 2018-05-07

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2017-9524 CVE-2017-10664
CWE-ID	CWE-476 CWE-19
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	QEMU Client/Desktop applications / Virtualization software
Vendor	QEMU

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Null pointer dereference

EUVDB-ID: #VU7338

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-9524

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote unauthenticated attacker to cause DoS condition on the target system.

The weakness exists due to NULL pointer dereference in Network Block Device(NBD) Server support during a failed negotiation of a client. A remote attacker can cause the affected server to crash.

Successful exploitation of the vulnerability results in denial of service.

Mitigation

Install update from vendor's website.

Vulnerable software versions

QEMU: 2.7.0 - 2.9.0

CPE2.3

External links

https://seclists.org/oss-sec/2017/q2/454

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to open a a specially crafted file.

Is there known malware, which exploits this vulnerability?

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

2) Data handling

EUVDB-ID: #VU12301