CVE-2020-27821 Information

Description

A flaw was found in the memory management API of QEMU during the initialization of a memory region cache. This issue could lead to an out-of-bounds write access to the MSI-X table while performing MMIO operations. A guest user may abuse this flaw to crash the QEMU process on the host resulting in a denial of service. This flaw affects QEMU versions prior to 5.2.0.

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=1902651 http://www.openwall.com/lists/oss-security/2020/12/16/6 https://security.netapp.com/advisory/ntap-20210115-0006/

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