Vulnerability CVE-2021-4206: Information
Description
A flaw was found in the QXL display device emulation in QEMU. An integer overflow in the cursor_alloc() function can lead to the allocation of a small cursor object followed by a subsequent heap-based buffer overflow. This flaw allows a malicious privileged guest user to crash the QEMU process on the host or potentially execute arbitrary code within the context of the QEMU process.
Severity: HIGH (8.2) Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Published: April 29, 2022
Modified: Nov. 7, 2023
Fixed packages
Package name | Branch | Fixed in version | Version from repository | Errata ID | Task # | State |
|---|---|---|---|---|---|---|
| pve-qemu | sisyphus | 7.1.0-alt1 | 8.1.5-alt1 | ALT-PU-2022-3081-1 | 310016 | Fixed |
| pve-qemu | p10 | 7.1.0-alt4 | 7.2.0-alt4 | ALT-PU-2022-3390-1 | 307814 | Fixed |
| pve-qemu | c10f1 | 7.1.0-alt4 | 7.2.0-alt3 | ALT-PU-2022-3390-1 | 307814 | Fixed |
| pve-qemu | p11 | 7.1.0-alt1 | 8.1.5-alt1 | ALT-PU-2022-3081-1 | 310016 | Fixed |
| qemu | sisyphus | 7.0.0-alt1 | 8.2.3-alt1 | ALT-PU-2022-2009-1 | 301530 | Fixed |
| qemu | sisyphus_e2k | 7.2.0-alt3.E2K.3 | 7.2.0-alt3.E2K.4 | ALT-PU-2024-1953-1 | - | Fixed |
| qemu | p10 | 8.0.0-alt1.p10 | 8.2.2-alt0.p10.1 | ALT-PU-2023-1830-1 | 320227 | Fixed |
| qemu | p10_e2k | 7.2.0-alt3.E2K.0 | 7.2.0-alt3.E2K.3 | ALT-PU-2023-6766-1 | - | Fixed |
| qemu | c10f1 | 8.0.0-alt1.p10 | 8.2.2-alt0.p10.1 | ALT-PU-2023-1869-1 | 321192 | Fixed |
| qemu | p11 | 7.0.0-alt1 | 8.2.3-alt1 | ALT-PU-2022-2009-1 | 301530 | Fixed |
References to Advisories, Solutions, and Tools
Hyperlink | Resource |
|---|---|
| https://starlabs.sg/advisories/21-4206/ |
|
| https://bugzilla.redhat.com/show_bug.cgi?id=2036998 |
|
| DSA-5133 |
|
| GLSA-202208-27 |
|
| [debian-lts-announce] 20220905 [SECURITY] [DLA 3099-1] qemu security update |
|