SB2022072233 - openEuler 22.03 LTS update for qemu

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) NULL pointer dereference (CVE-ID: CVE-2021-4158)

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

The vulnerability exists due to a NULL pointer dereference error in the ACPI code of QEMU when handling certain values. A privileged user can crash the QEMU process on the host, resulting in a denial of service condition.

2) 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).

3) Security restrictions bypass (CVE-ID: CVE-2018-13405)

The vulnerability allows a local attacker to create arbitrary files on the target system.

The vulnerability exists due to the inode_init_owner function, as defined in the fs/inode.c source code file, allows the creation of arbitrary files in set-group identification (SGID) directories. A local attacker can create arbitrary files with unintended group ownership.

Remediation

Install update from vendor's website.

References

• https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2022-1772