What is CVE-2021-39939?

CVE-2021-39939 is a medium-severity vulnerability in Gitlab, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2021-12-13.

How severe is CVE-2021-39939?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Resource exhaustion in Gitlab

CVE-2021-39939

An uncontrolled resource consumption vulnerability in GitLab Runner affecting all versions starting from 13.7 before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2, allows an attacker triggering a job with a specially crafted docker image to exhaust resources on runner manager

Vulnerability class: DoS (Denial of Service)

EPSS: 0.009 (56.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Gitlab
Gitlab Runner — versions >=13.7, <14.3.6, >=14.4, <14.4.4, >=14.5, <14.5.2

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

cve@gitlab.com (x_refsource_MISC, Broken Link)
cve@gitlab.com (x_refsource_CONFIRM, Third Party Advisory)

Frequently asked questions

What is CVE-2021-39939?: CVE-2021-39939 is a medium-severity vulnerability in Gitlab, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2021-12-13.
How severe is CVE-2021-39939?: Medium severity. CVSS v3 base score is 6.5 out of 10.