CVE-2021-41103

MEDIUM5.9EPSS 0.22%

Insufficiently restricted permissions on plugin directories

發布日:2021/10/4修改日:2026/3/13

也稱為:GHSA-c2h3-6mxw-7mvqCGA-gxxx-895r-4qvhGO-2022-0938

描述

### Impact A bug was found in containerd where container root directories and some plugins had insufficiently restricted permissions, allowing otherwise unprivileged Linux users to traverse directory contents and execute programs. When containers included executable programs with extended permission bits (such as setuid), unprivileged Linux users could discover and execute those programs. When the UID of an unprivileged Linux user on the host collided with the file owner or group inside a container, the unprivileged Linux user on the host could discover, read, and modify those files. ### Patches This vulnerability has been fixed in containerd 1.4.11 and containerd 1.5.7. Users should update to these version when they are released and may restart containers or update directory permissions to mitigate the vulnerability. ### Workarounds Limit access to the host to trusted users. Update directory permission on container bundles directories. ### For more information If you have any questions or comments about this advisory: * Open an issue in [github.com/containerd/containerd](https://github.com/containerd/containerd/issues/new/choose) * Email us at [[email protected]](mailto:[email protected])

受影響套件(4)

Debian/containerdfrom 0, < 1.4.5~ds1-2+deb11u1
Debian/containerdfrom 0, < 1.4.5~ds1-2+deb11u1
Go/github.com/containerd/containerdfrom 0, < 1.4.11
Go/github.com/containerd/containerdfrom 0, < 1.4.11, >= 1.5.0, < 1.5.7

CVSS 分數

來源	版本	嚴重程度	向量
osv	CVSS 3.1	MEDIUM5.9	CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

描述

受影響套件(4)

CVSS 分數

參考連結(14)