#VU31801 Out-of-bounds write in QEMU - CVE-2020-13361

Vulnerability identifier: #VU31801

Vulnerability risk: Medium

CVSSv4.0: 6.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-13361

CWE-ID: CWE-787

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 compromise vulnerable system.

The vulnerability exists due to a boundary error when processing frame count in es1370_transfer_audio in hw/audio/es1370.c. A local user on the guest operating system can send a specially crafted request and execute arbitrary code on the host operating 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
https://www.openwall.com/lists/oss-security/2020/05/28/1
https://lists.debian.org/debian-lts-announce/2020/06/msg00032.html
https://lists.gnu.org/archive/html/qemu-devel/2020-05/msg03983.html
https://security.netapp.com/advisory/ntap-20200608-0003/
https://security-tracker.debian.org/tracker/CVE-2020-13361
https://www.debian.org/security/2020/dsa-4728

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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.