CVE-2023-2861
The 9pfs server did not prohibit opening special files on the host side, potentially allowing a malicious client to escape from the exported 9p tree by creating and opening a device file in the shared folder.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.38%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A flaw was found in the 9p passthrough filesystem (9pfs) implementation in QEMU. The 9pfs server did not prohibit opening special files on the host side, potentially allowing a malicious client to escape from the exported 9p tree by creating and opening a device file in the shared folder.
- CVSS 3.1
- 7.1 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- EPSS
- 0.38% probability · 31th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-284
- Affected
- qemu/qemu
- Source
- patrick@puiterwijk.org
References
- https://access.redhat.com/security/cve/CVE-2023-2861Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2219266Issue Tracking, Patch
- https://lists.debian.org/debian-lts-announce/2024/03/msg00012.html
- https://security.netapp.com/advisory/ntap-20240125-0005/
- https://security.netapp.com/advisory/ntap-20240229-0002/
- https://access.redhat.com/security/cve/CVE-2023-2861Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2219266Issue Tracking, Patch
- https://lists.debian.org/debian-lts-announce/2024/03/msg00012.html
- https://security.netapp.com/advisory/ntap-20240125-0005/
- https://security.netapp.com/advisory/ntap-20240229-0002/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.