#VU31802 Out-of-bounds read in QEMU - CVE-2020-13362

Vulnerability identifier: #VU31802

Vulnerability risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-13362

CWE-ID: CWE-125

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 gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition in megasas_lookup_frame in hw/scsi/megasas.c. A local user on the guest operating system can pass specially crafted message with reply_queue_head field, trigger out-of-bounds read error and read contents of memory on the 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/2020/05/28/2
https://lists.debian.org/debian-lts-announce/2020/06/msg00032.html
https://lists.gnu.org/archive/html/qemu-devel/2020-05/msg03131.html
https://lists.gnu.org/archive/html/qemu-devel/2020-05/msg06250.html
https://security.netapp.com/advisory/ntap-20200608-0003/
https://security-tracker.debian.org/tracker/CVE-2020-13362
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.