CVE-2023-1386
Published: 24 July 2023
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.
Notes
| Author | Note |
|---|---|
Priority reason: Low severity issue, guest user could help host user escalate privileges |
|
| mdeslaur | as of 2023-11-30, there is no upstream fix for this issue |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
qemu Launchpad, Ubuntu, Debian |
upstream |
Needs triage
|
| bionic |
Deferred
(2023-11-30)
|
|
| focal |
Deferred
(2023-11-30)
|
|
| jammy |
Deferred
(2023-11-30)
|
|
| kinetic |
Ignored
(end of life, was deferred [2023-11-30])
|
|
| lunar |
Deferred
(2023-11-30)
|
|
| mantic |
Deferred
(2023-11-30)
|
|
| trusty |
Deferred
(2023-11-30)
|
|
| xenial |
Deferred
(2023-11-30)
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.8 |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |