CVE-2021-4207

 

Published at: - 29-04-2022 07:15

Last modified: - 23-09-2022 05:13

Total changes: - 6

Description

A flaw was found in the QXL display device emulation in QEMU. A double fetch of guest controlled values `cursor->header.width` and `cursor->header.height` can lead to the allocation of a small cursor object followed by a subsequent heap-based buffer overflow. A malicious privileged guest user could use this flaw to crash the QEMU process on the host or potentially execute arbitrary code within the context of the QEMU process.

Common Vulnerability Scoring System (CVSS)

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

 

Verification logic

 

Reference

• https://starlabs.sg/advisories/21-4207/
• https://bugzilla.redhat.com/show_bug.cgi?id=2036966
• DSA-5133-Third Party Advisory
• GLSA-202208-27-Third Party Advisory
• [debian-lts-announce] 20220905 [SECURITY] [DLA 3099-1] qemu security update-Mailing List, Third Party Advisory

 

Keywords

NVD

 

CVE-2021-4207

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures