medium5.9

CVE-2022-29162

Default inheritable capabilities for linux container should be empty

Impact

### Impact A bug was found in runc where `runc exec --cap` executed processes with non-empty inheritable Linux process capabilities, creating an atypical Linux environment and enabling programs with inheritable file capabilities to elevate those capabilities to the permitted set during execve(2). This bug did not affect the container security sandbox as the inheritable set never contained more capabilities than were included in the container's bounding set. ### Patches This bug has been fixed in runc 1.1.2. Users should update to this version as soon as possible. This fix changes `runc exec --cap` behavior such that the additional capabilities granted to the process being executed (as specified via `--cap` arguments) do not include inheritable capabilities. In addition, `runc spec` is changed to not set any inheritable capabilities in the created example OCI spec (`config.json`) file. ### Credits The opencontainers project would like to thank [Andrew G. Morgan](https://github.com/AndrewGMorgan) for responsibly disclosing this issue in accordance with the [opencontainers org security policy](https://github.com/opencontainers/.github/blob/master/SECURITY.md). ### For more information If you have any questions or comments about this advisory: * [Open an issue](https://github.com/opencontainers/runc/issues/new) * Email us at [security@opencontainers.org](mailto:security@opencontainers.org) if you think you’ve found a security bug

Affected packages

Ecosystem	Package	Affected	Fixed in
go	`github.com/opencontainers/runc`	< 1.1.2	1.1.2

Affected products

Vendor	Product	Affected versions
Linuxfoundation	Runc	before 1.1.2
Fedoraproject	Fedora	Versions 34, 35, 36

Weakness classification

CWE-276

Impact

Affected packages

Affected products

Weakness classification

References