CVE-2026-33945

CRITICAL9.9EPSS 0.03%

Incus has an abitrary file write through its systemd-creds options in github.com/lxc/incus

發布日:2026/3/27修改日:2026/4/28

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.

受影響套件(4)

CVSS 分數

來源版本嚴重程度向量
osvCVSS 3.1CRITICAL9.9CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

參考連結(5)