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CVE-2020-27821 Detail

Current 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.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  6.0 MEDIUM
Vector:  CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://www.openwall.com/lists/oss-security/2020/12/16/6
https://bugzilla.redhat.com/show_bug.cgi?id=1902651 Issue Tracking  Patch  Third Party Advisory 
https://security.netapp.com/advisory/ntap-20210115-0006/

Weakness Enumeration

CWE-ID CWE Name Source
CWE-787 Out-of-bounds Write Provider acceptance level Red Hat, Inc.  
CWE-122 Heap-based Buffer Overflow Provider acceptance level Red Hat, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2020-27821
NVD Published Date:
12/08/2020
NVD Last Modified:
01/15/2021
Source:
Red Hat, Inc.