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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
7/10

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.46%

36.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersionsUpdate
LinuxfoundationRunc<= 0.1.1—
LinuxfoundationRunc1.0.0Rc1
DebianDebian Linux9.0—
DebianDebian Linux10.0—
OpensuseLeap15.1—
CanonicalUbuntu Linux18.04—
CanonicalUbuntu Linux19.10—
RedhatOpenshift Container Platform4.1—
RedhatOpenshift Container Platform4.2—

References

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.

Are you affected by CVE-2019-19921?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST