SB2023091905 - Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 update for redhat-release-virtualization-host and redhat-virtualization-host
Published: September 19, 2023
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 secuirty vulnerabilities.
1) Improper access control (CVE-ID: CVE-2022-21216)
The vulnerability allows a remote user to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper access restrictions in out-of-band management in Intel processors. A remote privileged user on the local network can bypass implemented security restrictions and gain unauthorized access to the application.
2) Incorrect default permissions (CVE-ID: CVE-2022-33196)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to incorrect default permissions for memory controller configurations for some Intel Xeon processors when using Intel Software Guard Extensions. A local user escalate privileges on the system.
3) Type Confusion (CVE-ID: CVE-2023-0286)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a type confusion error related to X.400 address processing inside an X.509 GeneralName. A remote attacker can pass specially crafted data to the application, trigger a type confusion error and perform a denial of service (DoS) attack or read memory contents.
In most cases, the attack requires the attacker to provide both the certificate chain and CRL, neither of which need to have a valid signature. If the attacker only controls one of these inputs, the other input must already contain an X.400 address as a CRL distribution point, which is uncommon. As such, this vulnerability is most likely to only affect applications which have implemented their own functionality for retrieving CRLs over a network.
Remediation
Install update from vendor's website.