CVE-2026-33945
Incus has an abitrary file write through its systemd-creds options in github.com/lxc/incus
描述
Incus is a system container and virtual machine manager. Incus instances have an option to provide credentials to systemd in the guest. For containers, this is handled through a shared directory. Prior to version 6.23.0, an attacker can set a configuration key named something like `systemd.credential.../../../../../../root/.bashrc` to cause Incus to write outside of the `credentials` directory associated with the container. This makes use of the fact that the Incus syntax for such credentials is `systemd.credential.XYZ` where `XYZ` can itself contain more periods. While it's not possible to read any data this way, it's possible to write to arbitrary files as root, enabling both privilege escalation and denial of service attacks. Version 6.23.0 fixes the issue.
如何修補 CVE-2026-33945
要修補 CVE-2026-33945,請將受影響套件升級到下列已修補版本。
- —升級至 6.0.6-2 或更新版本
- —未列出修補版本
- —升級至 6.23.0 或更新版本
- —升級至 6.23.0 或更新版本
CVE-2026-33945 正在被利用嗎?
低 — EPSS 為 0.4%,目前沒有觀察到大規模利用活動。
受影響套件(4)
- from 0, < 6.0.6-2
- from 0
- from 0, < 6.23.0
- from 0, < 6.23.0
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.9 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |