CVE-2019-19921
HIGHCVSS 7/10EPSS 0.46%
Last modified
CVE-2019-19921 is a high-severity vulnerability rated 7/10 on the CVSS scale. 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. EPSS estimates a 0.46% chance of exploitation in the next 30 days.
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.)
Metrics
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Linuxfoundation | Runc | <= 0.1.1 | — |
| Linuxfoundation | Runc | 1.0.0 | Rc1 |
| Debian | Debian Linux | 9.0 | — |
| Debian | Debian Linux | 10.0 | — |
| Opensuse | Leap | 15.1 | — |
| Canonical | Ubuntu Linux | 18.04 | — |
| Canonical | Ubuntu Linux | 19.10 | — |
| Redhat | Openshift Container Platform | 4.1 | — |
| Redhat | Openshift Container Platform | 4.2 | — |
References
- http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00018.htmlBroken Link, Mailing List, Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0688Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0695Third Party Advisory
- https://github.com/opencontainers/runc/issues/2197Issue Tracking, Patch, Third Party Advisory
- https://github.com/opencontainers/runc/pull/2190Issue Tracking, Third Party Advisory
- https://github.com/opencontainers/runc/releasesThird Party Advisory
- https://security-tracker.debian.org/tracker/CVE-2019-19921Third Party Advisory
- https://security.gentoo.org/glsa/202003-21Third Party Advisory
- https://usn.ubuntu.com/4297-1/Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00018.htmlBroken Link, Mailing List, Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0688Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0695Third Party Advisory
- https://github.com/opencontainers/runc/issues/2197Issue Tracking, Patch, Third Party Advisory
- https://github.com/opencontainers/runc/pull/2190Issue Tracking, Third Party Advisory
- https://github.com/opencontainers/runc/releasesThird Party Advisory
- https://security-tracker.debian.org/tracker/CVE-2019-19921Third Party Advisory
- https://security.gentoo.org/glsa/202003-21Third Party Advisory
- https://usn.ubuntu.com/4297-1/Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2019-19921?
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.)
How severe is CVE-2019-19921?
CVE-2019-19921 has a CVSS score of 7/10 (HIGH severity). The EPSS model estimates a 0.46% probability of exploitation in the next 30 days.
How do I fix CVE-2019-19921?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2019-19921?
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