A vulnerability, which was classified as critical, was found in QEMU (Virtualization Software) (the affected version is unknown). Affected is an unknown code of the component virtio-fs Shared File System Daemon. The manipulation with an unknown input leads to a dropped privileges vulnerability. CWE is classifying the issue as CWE-273. The product attempts to drop privileges but does not check or incorrectly checks to see if the drop succeeded. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

A flaw was found in the QEMU virtio-fs shared file system daemon (virtiofsd) implementation. This flaw is strictly related to CVE-2018-13405. A local guest user 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 could allow a malicious unprivileged user inside the guest to gain access to resources accessible to the root group, potentially escalating their privileges within the guest. A malicious local user in the host might also leverage this unexpected executable file created by the guest to escalate their privileges on the host system.

The weakness was presented 08/29/2022 as 449e8171f96a6a944d1f3b7d3627ae059eae21ca. The advisory is available at gitlab.com. This vulnerability is traded as CVE-2022-0358 since 01/25/2022. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

Applying the patch 449e8171f96a6a944d1f3b7d3627ae059eae21ca is able to eliminate this problem. The bugfix is ready for download at gitlab.com.

Productinfo

Type

• Virtualization Software

Name

• QEMU

License

• open-source

CPE 2.3info

• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Discussion