#VU68558 Heap-based buffer overflow in QEMU - CVE-2020-17380

Vulnerability identifier: #VU68558

Vulnerability risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-17380

CWE-ID: CWE-122

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
QEMU
Client/Desktop applications / Virtualization software

Vendor: QEMU

Description

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

The vulnerability exists due to a boundary error in the SDHCI device emulation support while performing a multi block SDMA transfer via the sdhci_sdma_transfer_multi_blocks() routine in hw/sd/sdhci.c. A remote user of the guest OS can trigger a heap-based buffer overflow and crash the QEMU process on the host OS.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

QEMU: 5.0.0

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External links
https://lists.nongnu.org/archive/html/qemu-devel/2020-09/msg01175.html
https://bugzilla.redhat.com/show_bug.cgi?id=1862167
https://www.openwall.com/lists/oss-security/2021/03/09/1
https://security.netapp.com/advisory/ntap-20210312-0003/
https://lists.debian.org/debian-lts-announce/2021/04/msg00009.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.