CVE-2021-20221
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- CVE-2021-20221
CVE Details
| Release Date: | 2021-05-13 |
Description
An out-of-bounds heap buffer access issue was found in the ARM Generic Interrupt Controller emulator of QEMU up to and including qemu 4.2.0on aarch64 platform. The issue occurs because while writing an interrupt ID to the controller memory area, it is not masked to be 4 bits wide. It may lead to the said issue while updating controller state fields and their subsequent processing. A privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.
See more information about CVE-2021-20221 from MITRE CVE dictionary and NIST NVD
CVSS v3.0 metrics
NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.
| Base Score: | 6 | Base Metrics: | AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H |
| Access Vector: | Local network | Attack Complexity: | Low |
| Privileges Required: | High | User Interaction: | None |
| Scope: | Changed | Confidentiality Impact: | None |
| Integrity Impact: | None | Availability Impact: | High |
Errata information
| Platform | Errata | Release Date |
| Oracle Linux version 7 (qemu) | ELSA-2021-9285 | 2021-06-06 |
| Oracle Linux version 8 (hivex) | ELSA-2021-3061 | 2021-08-12 |
| Oracle Linux version 8 (hivex) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (libguestfs) | ELSA-2021-3061 | 2021-08-12 |
| Oracle Linux version 8 (libguestfs) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (libguestfs-winsupport) | ELSA-2021-3061 | 2021-08-12 |
| Oracle Linux version 8 (libguestfs-winsupport) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (libiscsi) | ELSA-2021-3061 | 2021-08-12 |
| Oracle Linux version 8 (libiscsi) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (libnbd) | ELSA-2021-3061 | 2021-08-12 |
| Oracle Linux version 8 (libnbd) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (libvirt) | ELSA-2021-3061 | 2021-08-12 |
| Oracle Linux version 8 (libvirt) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (libvirt-dbus) | ELSA-2021-3061 | 2021-08-12 |
| Oracle Linux version 8 (libvirt-dbus) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (libvirt-python) | ELSA-2021-3061 | 2021-08-12 |
| Oracle Linux version 8 (libvirt-python) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (nbdkit) | ELSA-2021-3061 | 2021-08-12 |
| Oracle Linux version 8 (nbdkit) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (netcf) | ELSA-2021-3061 | 2021-08-12 |
| Oracle Linux version 8 (netcf) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (perl-Sys-Virt) | ELSA-2021-3061 | 2021-08-12 |
| Oracle Linux version 8 (perl-Sys-Virt) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (qemu-kvm) | ELSA-2021-3061 | 2021-08-12 |
| Oracle Linux version 8 (qemu-kvm) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (seabios) | ELSA-2021-3061 | 2021-08-12 |
| Oracle Linux version 8 (seabios) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (sgabios) | ELSA-2021-3061 | 2021-08-12 |
| Oracle Linux version 8 (sgabios) | ELSA-2021-9568 | 2021-12-01 |
| Oracle Linux version 8 (supermin) | ELSA-2021-3061 | 2021-08-12 |
| Oracle Linux version 8 (supermin) | ELSA-2021-9568 | 2021-12-01 |
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