SB2022032120 - Red Hat Enterprise Linux Advanced Virtualization 8.4 update for the virt:av and virt-devel:av modules
Published: March 21, 2022
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 secuirty vulnerabilities.
1) Incorrect default permissions (CVE-ID: CVE-2022-0358)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to incorrect QEMU virtio-fs shared file system daemon (virtiofsd) implementation. An attacker on the guest OS can create files in the directories shared by virtio-fs with unintended group ownership in a scenario where a directory is SGID to a certain group and is writable by a user who is not a member of the group. This can lead to privilege escalation within the guest OS.
The vulnerability exists due to incomplete fox for #VU13631 (CVE-2018-13405).
2) Error Handling (CVE-ID: CVE-2022-0485)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to error handling mechanism within the nbdcopy tool when performing multi-threaded copies using asynchronous nbd calls. This could result in the silent creation of a corrupted destination image.
Remediation
Install update from vendor's website.