PT-2021-7374 · Qemu+5 · Qemu+5

Gaoning Pan + 1 · Published 2021-01-20 · Updated 2024-10-23 · CVE-2021-20203

Positive Technologies (AI Summary)

CVSS v3.1

3.2

Low

Base vector

AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L

Name of the Vulnerable Software and Affected Versions QEMU versions up to v5.2.0

Description An integer overflow issue was found in the vmxnet3 NIC emulator of QEMU. This issue may occur if a guest supplies invalid values for rx/tx queue size or other NIC parameters. A privileged guest user may use this flaw to crash the QEMU process on the host, resulting in a Denial of Service (DoS) scenario.

Recommendations For QEMU versions up to v5.2.0, update to a version later than v5.2.0 to resolve the issue. As a temporary workaround, consider restricting the ability of guest users to supply invalid values for NIC parameters to minimize the risk of exploitation.

Exploit

Fix

DoS

Integer Overflow

Weakness Enumeration

CWE-190

Related Identifiers

ALT-PU-2021-1767

ALT-PU-2021-3585

ALT-PU-2022-1412

ALT-PU-2022-3390

ALT-PU-2024-13687

ALT-PU-2024-14149

BDU:2022-05835

CVE-2021-20203

DLA-2623-1

DLA-3099-1

OESA-2021-1128

OPENSUSE-SU-2021:0363-1

OPENSUSE-SU-2021_0363-1

OPENSUSE-SU-2024:11287-1

SUSE-SU-2021:0521-1

SUSE-SU-2021:1240-1

SUSE-SU-2021:1241-1

SUSE-SU-2021:1242-1

SUSE-SU-2021:1244-1

SUSE-SU-2021:1245-1

SUSE-SU-2021:1305-1

USN-5307-1

Affected Products

Alt Linux

Astra Linux

Linuxmint

Qemu

Suse

Ubuntu

References · 244

• 🔥 https://github.com/QiuhaoLi/CVE-2021-3929-3947 · Exploit
• 🔥 https://bugs.launchpad.net/qemu/+bug/1913873 · Exploit
• https://ubuntu.com/security/CVE-2021-3682 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-0358 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2021:0363-1 · Vendor Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=1922441 · Patch
• https://ubuntu.com/security/CVE-2021-3930 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-2623-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:0521-1 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se17-bulletin-2022-0819SE17 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2021-1128 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-3544 · Vendor Advisory
• https://security.gentoo.org/glsa/202208-27 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-20203 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:1244-1 · Vendor Advisory