Improper Check for Dropped Privileges Affecting qemu package, versions <1:6.2+dfsg-2ubuntu6.2


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-UBUNTU2204-QEMU-2775590
  • published29 Jan 2022
  • disclosed29 Aug 2022

Introduced: 29 Jan 2022

CVE-2022-0358  (opens in a new tab)
CWE-273  (opens in a new tab)

How to fix?

Upgrade Ubuntu:22.04 qemu to version 1:6.2+dfsg-2ubuntu6.2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream qemu package and not the qemu package as distributed by Ubuntu. See How to fix? for Ubuntu:22.04 relevant fixed versions and status.

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.

CVSS Scores

version 3.1