Vulnerability identifier: #VU29545

Vulnerability risk: Low

CVSSv3.1: 5.9 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2020-15469

CWE-ID: CWE-476

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
QEMU
Client/Desktop applications / Virtualization software

Vendor: QEMU

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error in QEMU. A remote attacker can trigger the MemoryRegionOps object to lack read/write callback methods, leading to a NULL pointer dereference.

Mitigation
Install update from vendor's website.

Vulnerable software versions

QEMU: 4.2.0

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External links
http://www.openwall.com/lists/oss-security/2020/07/02/1
http://lists.gnu.org/archive/html/qemu-devel/2020-06/msg09961.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. However, proof of concept for this vulnerability is available.