CVE-2021-3416 Information

Description

A potential stack overflow via infinite loop issue was found in various NIC emulators of QEMU in versions up to and including 5.2.0. The issue occurs in loopback mode of a NIC wherein reentrant DMA checks get bypassed. A guest user/process may use this flaw to consume CPU cycles or crash the QEMU process on the host resulting in DoS scenario.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H

Reference

https://bugzilla.redhat.com/show_bug.cgi?id=1932827 https://www.openwall.com/lists/oss-security/2021/02/26/1 https://lists.debian.org/debian-lts-announce/2021/04/msg00009.html https://security.netapp.com/advisory/ntap-20210507-0002/

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction Required

HIGH

Scope

NONE

Confidentiality Impact

CHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

6.0