Vulnerabilities > CVE-2021-20295 - Out-of-bounds Read vulnerability in Qemu

CVSS 6.5 - MEDIUM

Attack vector

LOCAL

Attack complexity

LOW

Privileges required

LOW

Confidentiality impact

HIGH

Integrity impact

NONE

Availability impact

NONE

local

low complexity

qemu

CWE-125

NVD

Published: 2022-04-01

Updated: 2024-11-21

Summary

It was discovered that the update for the virt:rhel module in the RHSA-2020:4676 (https://access.redhat.com/errata/RHSA-2020:4676) erratum released as part of Red Hat Enterprise Linux 8.3 failed to include the fix for the qemu-kvm component issue CVE-2020-10756, which was previously corrected in virt:rhel/qemu-kvm via erratum RHSA-2020:4059 (https://access.redhat.com/errata/RHSA-2020:4059). CVE-2021-20295 was assigned to that Red Hat specific security regression. For more details about the original security issue CVE-2020-10756, refer to bug 1835986 or the CVE page: https://access.redhat.com/security/cve/CVE-2020-10756.

Vulnerable Configurations

Part	Description	Count
Application	Qemu Qemu Qemu - Qemu Qemu 0.1 Qemu Qemu 0.1.0 Qemu Qemu 0.1.1 Qemu Qemu 0.1.2 Qemu Qemu 0.1.3 Qemu Qemu 0.1.4 Qemu Qemu 0.1.5 Qemu Qemu 0.1.6 Qemu Qemu 0.2 Qemu Qemu 0.2.0 Qemu Qemu 0.3 Qemu Qemu 0.3.0 Qemu Qemu 0.4 Qemu Qemu 0.4.0 Qemu Qemu 0.4.1 Qemu Qemu 0.4.2 Qemu Qemu 0.4.3 Qemu Qemu 0.4.4 Qemu Qemu 0.5.0 Qemu Qemu 0.5.1 Qemu Qemu 0.5.2 Qemu Qemu 0.5.3 Qemu Qemu 0.5.4 Qemu Qemu 0.5.5 Qemu Qemu 0.6.0 Qemu Qemu 0.6.1 Qemu Qemu 0.7.0 Qemu Qemu 0.7.1 Qemu Qemu 0.7.2 Qemu Qemu 0.8.0 Qemu Qemu 0.8.1 Qemu Qemu 0.8.2 Qemu Qemu 0.9.0 Qemu Qemu 0.9.1 Qemu Qemu 0.9.1-5 Qemu Qemu 0.10.0 Qemu Qemu 0.10.1 Qemu Qemu 0.10.2 Qemu Qemu 0.10.3 Qemu Qemu 0.10.4 Qemu Qemu 0.10.5 Qemu Qemu 0.10.6 Qemu Qemu 0.11.0 Qemu Qemu 0.11.0-Rc0 Qemu Qemu 0.11.0-Rc1 Qemu Qemu 0.11.0-Rc2 Qemu Qemu 0.11.1 Qemu Qemu 0.12.0 Qemu Qemu 0.12.1 Qemu Qemu 0.12.2 Qemu Qemu 0.12.3 Qemu Qemu 0.12.4 Qemu Qemu 0.12.5 Qemu Qemu 0.13.0 Qemu Qemu 0.14.0 Qemu Qemu 0.14.1 Qemu Qemu 0.15.0 Qemu Qemu 0.15.1 Qemu Qemu 0.15.2 Qemu Qemu 1.0 Qemu Qemu 1.0.1 Qemu Qemu 1.1 Qemu Qemu 1.1.0 Qemu Qemu 1.1.1 Qemu Qemu 1.1.2 Qemu Qemu 1.1.2\+Dfsg Qemu Qemu 1.2.0 Qemu Qemu 1.2.1 Qemu Qemu 1.2.2 Qemu Qemu 1.3.0 Qemu Qemu 1.3.1 Qemu Qemu 1.4.0 Qemu Qemu 1.4.1 Qemu Qemu 1.4.2 Qemu Qemu 1.5.0 Qemu Qemu 1.5.1 Qemu Qemu 1.5.2 Qemu Qemu 1.5.3 Qemu Qemu 1.6.0 Qemu Qemu 1.6.1 Qemu Qemu 1.6.2 Qemu Qemu 1.7.0 Qemu Qemu 1.7.1 Qemu Qemu 1.7.2 Qemu Qemu 1\ Qemu Qemu 2.0.0 Qemu Qemu 2.0.1 Qemu Qemu 2.0.2 Qemu Qemu 2.1\+Dfsg Qemu Qemu 2.1.0 Qemu Qemu 2.1.1 Qemu Qemu 2.1.2 Qemu Qemu 2.1.3 Qemu Qemu 2.2.0 Qemu Qemu 2.2.1 Qemu Qemu 2.3.0 Qemu Qemu 2.3.1 Qemu Qemu 2.4.0 Qemu Qemu 2.4.0.1 Qemu Qemu 2.4.1 Qemu Qemu 2.5.0 Qemu Qemu 2.5.1 Qemu Qemu 2.5.1.1 Qemu Qemu 2.6.0 Qemu Qemu 2.6.1 Qemu Qemu 2.6.2 Qemu Qemu 2.7.0 Qemu Qemu 2.7.1 Qemu Qemu 2.8.0 Qemu Qemu 2.8.1 Qemu Qemu 2.8.1.1 Qemu Qemu 2.9.0 Qemu Qemu 2.9.1 Qemu Qemu 2.10.0 Qemu Qemu 2.10.1 Qemu Qemu 2.10.2 Qemu Qemu 2.11.0 Qemu Qemu 2.11.1 Qemu Qemu 2.11.2 Qemu Qemu 2.12.0 Qemu Qemu 2.12.1 Qemu Qemu 2.12.50 Qemu Qemu 2.17.2 Qemu Qemu 3.0.0 Qemu Qemu 3.0.1 Qemu Qemu 3.1 Qemu Qemu 3.1.0 Qemu Qemu 3.1.1 Qemu Qemu 3.1.1.1 Qemu Qemu 3.1.50 Qemu Qemu 4.0.0 Qemu Qemu 4.0.1 Qemu Qemu 4.1.0 Qemu Qemu 4.1.1 Qemu Qemu 4.2.0	319

Common Weakness Enumeration (CWE)

CWE-125 - Out-of-bounds Read

Common Attack Pattern Enumeration and Classification (CAPEC)

Overread Buffers
An adversary attacks a target by providing input that causes an application to read beyond the boundary of a defined buffer. This typically occurs when a value influencing where to start or stop reading is set to reflect positions outside of the valid memory location of the buffer. This type of attack may result in exposure of sensitive information, a system crash, or arbitrary code execution.

Summary

Vulnerable Configurations

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

References