SB2021062316 - Advanced Virtualization for RHEL 8 update for the virt:8.2 and virt-devel:8.2 modules

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Main Vulnerability Database SB2021062316

SB2021062316 - Advanced Virtualization for RHEL 8 update for the virt:8.2 and virt-devel:8.2 modules

Published: June 23, 2021

Security Bulletin ID SB2021062316
Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Out-of-bounds write (CVE-ID: CVE-2020-13754)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input in hw/pci/msix.c. A local user on the guest operating system can send specially crafted address in an msi-x mmio operation, trick the victim into opening it using the affected software, trigger out-of-bounds write and execute arbitrary code.


2) Out-of-bounds read (CVE-ID: CVE-2021-20221)

The vulnerability allows a local user to perform DoS attack.

The vulnerability exists due to an out-of-bounds heap buffer access in the ARM Generic Interrupt Controller emulator of QEMU. A privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.


Remediation

Install update from vendor's website.

References