CVE-2023-1386

Qemu: 9pfs: suid/sgid bits not dropped on file write

Published Jul 24, 2023 CVSS 3.1 · 3.3 Low EPSS < 1% KEV · Not listed
Description
A flaw was found in the 9p passthrough filesystem (9pfs) implementation in QEMU. When a local user in the guest writes an executable file with SUID or SGID, none of these privileged bits are correctly dropped. As a result, in rare circumstances, this flaw could be used by malicious users in the guest to elevate their privileges within the guest and help a host local user to elevate privileges on the host.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2023-23642 A flaw was found in the 9p passthrough filesystem (9pfs) implementation in QEMU. When a local user in the guest writes an executable file with SUID or SGID, none of these privileged bits are correctly dropped. As a result, in rare circumstances, this flaw could be used by malicious users in the guest to elevate their privileges within the guest and help a host local user to elevate privileges on the host.
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Sep 25, 2024, 7:57 PM
Reserved
Mar 14, 2023, 10:31 AM
Status
Modified
Published
Jul 24, 2023, 4:15 PM
Modified
Jun 17, 2026, 5:27 AM
Severity
Low
Public date
Mar 7, 2023, 12:00 AM