Alpaquita LinuxStreamSecurity Advisory
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CVE-2021-4207

Published: April 29, 2022Last modified: November 8, 2023

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.

Severity score breakdown

ParameterValue
Base score8.2
Attack VectorLOCAL
Attack complexityLOW
Privileges requiredHIGH
User interactionNONE
ScopeCHANGED
ConfidentialityHIGH
Integrity impactHIGH
Availability impactHIGH
VectorCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Status

ProductReleasePackageStatus
Alpaquita Linux23 LTSqemuNot affected (7.1.0-r4)
StreamqemuNot affected (8.0.4-r0)

References

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