Vulnerability in Qemu
CVE-2022-0358
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (23.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 23.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Qemu
- Red Hat Enterprise Linux — versions 8.0
- Qemu/virtiofsd — versions Fixed in qemu v6.2.0-7
Weakness classification (CWE)
References
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- gitlab.com/qemu-project/qemu/-/commit/449e8171f96a6a944d1f3b7d3627ae059eae21ca (Patch, Third Party Advisory)
- access.redhat.com/security/cve/CVE-2022-0358 (Third Party Advisory)
- security.netapp.com/advisory/ntap-20221007-0008/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2022-0358?
- CVE-2022-0358 is a high-severity vulnerability in Qemu, classified under Improper Check for Dropped Privileges. CVSS score: 7.8/10. Published 2022-08-29.
- How severe is CVE-2022-0358?
- High severity. CVSS v3 base score is 7.8 out of 10.