CVE-2022-29162 Incorrect Default Permissions in runc
Attackers can exploit incorrect default permissions in runc exec to elevate capabilities, requiring specific command-line flags to trigger.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-29162?
CVE-2022-29162 is a medium-severity vulnerability in Fedoraproject Fedora, published on 17 May 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
runc is a CLI tool for spawning and running containers on Linux according to the OCI specification. A bug was found in runc prior to version 1.1.2 where `runc exec --cap` created 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. This bug has been fixed in runc 1.1.2. 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.
Weakness: CWE-276
Which versions are affected by CVE-2022-29162?
3 open source packages ship an affected version, including github.com/opencontainers/runc. It affects 2 products.
| Package | Affected | Fixed in |
|---|---|---|
github.com/opencontainers/runc Go | All versions | 1.1.2 |
github.com/opencontainers/runc Go | All versions | 1.1.2 |
github.com/opencontainers/runc Go | All versions | 1.1.2 |
Linux distribution packages (5)
runc AlmaLinux:9 | All versions | 4:1.1.4-1.el9 |
runc Red Hat:enterprise_linux:9::appstream | All versions | 4:1.1.4-1.el9 |
runc-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 4:1.1.4-1.el9 |
runc-debugsource Red Hat:enterprise_linux:9::appstream | All versions | 4:1.1.4-1.el9 |
runc Rocky Linux:9 | All versions | 4:1.1.4-1.el9_1 |
Products include Fedoraproject Fedora, Linuxfoundation Runc.
How do I fix CVE-2022-29162?
Upgrade github.com/opencontainers/runc to 1.1.2 or later.
Is CVE-2022-29162 being exploited?
There is no known exploitation of CVE-2022-29162 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Fedora
Sources
Also known as ALSA-2022:8090, AZL-9817, CLEANSTART-2026-CQ48087, DEBIAN-CVE-2022-29162, GHSA-f3fp-gc8g-vw66, GO-2022-0452 and 5 more.