SB2023050972 - Red Hat Enterprise Linux 9 update for qemu-kvm

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Main Vulnerability Database SB2023050972

SB2023050972 - Red Hat Enterprise Linux 9 update for qemu-kvm

Published: May 9, 2023

Security Bulletin ID SB2023050972
Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Integer underflow (CVE-ID: CVE-2022-3165)

The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due to integer underflow in the QEMU VNC server while processing ClientCutText messages in the extended format. A remote client can send a specially crafted payload message to the VNC server and perform a denial of service (DoS) attack.


2) Integer overflow (CVE-ID: CVE-2022-4172)

The vulnerability allows a malicious guest to perform a denial of service (DoS) attack.

The vulnerability exists due to integer overflow within the read_erst_record() and write_erst_record() functions in the ACPI Error Record Serialization Table (ERST) device of QEMU. A malicious guest can overrun the host buffer allocated for the ERST memory device and crash the QEMU process on the host.


Remediation

Install update from vendor's website.

References