Remote code execution in QEMU SDHCI controller emulation

1) Out-of-bounds write

EUVDB-ID: #VU68559

Risk: Medium

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-3409

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a remote user to compromise vulnerable system.

The vulnerability exists due to a boundary error in the SDHCI controller emulation code. A remote user on the guest OS can trigger an out-of-bounds write and execute arbitrary code on QEMU host.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

QEMU: 5.0.0 - 5.2.0

CPE2.3

• cpe:2.3:a:qemu:qemu:5.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:qemu:qemu:5.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:qemu:qemu:5.1.0:*:*:*:*:*:*:*

External links

https://www.openwall.com/lists/oss-security/2021/03/09/1
https://bugzilla.redhat.com/show_bug.cgi?id=1928146
https://lists.debian.org/debian-lts-announce/2021/04/msg00009.html
https://security.netapp.com/advisory/ntap-20210507-0001/
https://security.gentoo.org/glsa/202208-27

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to open a a specially crafted file.

Is there known malware, which exploits this vulnerability?

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