Vulnerability identifier: #VU31808

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-2020-13800

CWE-ID: CWE-835

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 infinite loop in ati-vga in hw/display/ati.c. A local user on the guest operating system can trigger infinite recursion via a crafted mm_index value during an ati_mm_read or ati_mm_write call and perform a denial of service 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

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External links
http://lists.gnu.org/archive/html/qemu-devel/2020-06/msg00825.html
http://security.netapp.com/advisory/ntap-20200717-0001/
http://www.openwall.com/lists/oss-security/2020/06/04/2

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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 local network (LAN).

Is there known malware, which exploits this vulnerability?

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