Vulnerability in Linuxfoundation Runc
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.)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (35.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 35.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Linuxfoundation Runc — versions 1.0.0
- Canonical Ubuntu Linux — versions 18.04, 19.10
- Debian Linux — versions 9.0, 10.0
- openSUSE Leap — versions 15.1
- Red Hat Openshift Container Platform — versions 4.1, 4.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/opencontainers/runc/releases (Third Party Advisory)
- security-tracker.debian.org/tracker/CVE-2019-19921 (Third Party Advisory)
- github.com/opencontainers/runc/issues/2197 (Patch, Third Party Advisory, Issue Tracking)
- github.com/opencontainers/runc/pull/2190 (Third Party Advisory, Issue Tracking)
- lists.opensuse.org/opensuse-security-announce/2020-02/msg00018.html (vendor-advisory, Mailing List, Third Party Advisory, Broken Link)
- access.redhat.com/errata/RHSA-2020:0688 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2020:0695 (vendor-advisory, Third Party Advisory)
- security.gentoo.org/glsa/202003-21 (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/4297-1/ (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2023/03/msg00023.html (mailing-list)
Frequently asked questions
- What is CVE-2019-19921?
- CVE-2019-19921 is a high-severity vulnerability in Linuxfoundation Runc, classified under Use of Incorrectly-Resolved Name or Reference. CVSS score: 7.0/10. Published 2020-02-12.
- How severe is CVE-2019-19921?
- High severity. CVSS v3 base score is 7.0 out of 10.
- Is CVE-2019-19921 known to be exploited?
- 8 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.