What is CVE-2018-10199?

CVE-2018-10199 is a critical-severity vulnerability in Mruby, classified under Use After Free. CVSS score: 9.8/10. Published 2018-04-18.

How severe is CVE-2018-10199?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2018-10199 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Use After Free in Mruby

CVE-2018-10199

In versions of mruby up to and including 1.4.0, a use-after-free vulnerability exists in src/io.c::File#initilialize_copy(). An attacker that can cause Ruby code to be run can possibly use this to execute arbitrary code.

Vulnerability class: Use-After-Free

EPSS: 0.023 (81.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Mruby
N/a — versions n/a

Weakness classification (CWE)

CWE-416 — Use After Free

Public proof-of-concept exploits

nautilus-fuzz/nautilus

References

cve@mitre.org (x_refsource_CONFIRM, Patch)
cve@mitre.org (x_refsource_CONFIRM, Third Party Advisory)

Frequently asked questions

What is CVE-2018-10199?: CVE-2018-10199 is a critical-severity vulnerability in Mruby, classified under Use After Free. CVSS score: 9.8/10. Published 2018-04-18.
How severe is CVE-2018-10199?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2018-10199 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.