#VU31804 NULL pointer dereference in QEMU


Published: 2020-07-24

Vulnerability identifier: #VU31804

Vulnerability risk: Medium

CVSSv3.1: 6.2 [CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2020-13659

CWE-ID: CWE-476

Exploitation vector: Local 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 exec.c, related to BounceBuffer. A local user on the guest operating system can perform a denial of service (DoS) attack against the host system.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability..

Vulnerable software versions

QEMU: 4.1.0 - 5.0.0


External links
http://www.openwall.com/lists/oss-security/2020/06/01/3
http://lists.gnu.org/archive/html/qemu-devel/2020-05/msg07313.html
http://security.netapp.com/advisory/ntap-20200608-0007/
http://www.debian.org/security/2020/dsa-4728


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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


Latest bulletins with this vulnerability