Is CVE-2019-16255 in the CISA KEV catalog?

No. CVE-2019-16255 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2019-16255?

CVE-2019-16255 has a CVSS v3 base score of 8.1 (HIGH).

What is the EPSS score for CVE-2019-16255?

CVE-2019-16255 has an EPSS score of 4.22% (90th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-16255?

Upgrade jruby on debian 12 to 9.3.9.0+ds-1 or later. Fixes are available for 5 affected products.

CVE & CISA-KEV Catalog

CVE-2019-16255

HIGHEPSS 90th pctl

8.1

CVSS v3

NVD

Description

Ruby through 2.4.7, 2.5.x through 2.5.6, and 2.6.x through 2.6.4 allows code injection if the first argument (aka the "command" argument) to Shell#[] or Shell#test in lib/shell.rb is untrusted data. An attacker can exploit this to call an arbitrary Ruby method.

CWE-94Code Injection

How to fix

Remediation Available

jrubyDebian

Fixed in:9.3.9.0+ds-1CVE-2019-16255

libruby2.3Ubuntu

Fixed in:2.3.1-2~ubuntu16.04.14USN-4201-1

libruby2.5Ubuntu

Fixed in:2.5.1-1ubuntu1.6USN-4201-1

ruby2.3Ubuntu

Fixed in:2.3.1-2~ubuntu16.04.14USN-4201-1

ruby2.5Ubuntu

Fixed in:2.5.1-1ubuntu1.6USN-4201-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

4.22%probability of exploitation in 30 days

90thpercentile

Elevated risk: more likely to be exploited than 90% of all known CVEs.

References

Patch2

Vendor Advisory1

ruby-lang.org

Third-Party Advisory8

Release Notes3

Other references1

lists.debian.org

Related Vulnerabilities

Other CWE-94 (Code Injection) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2017-9841	Critical	9.8	100%	KEV	Fix
CVE-2015-1635	Critical	9.8	100%	KEV	-
CVE-2022-22954	Critical	9.8	100%	KEV + Ransom	-
CVE-2021-22204	Medium	6.8	100%	KEV	Fix
CVE-2025-3248	Critical	9.8	100%	KEV	Fix
CVE-2012-0158	High	8.8	100%	KEV	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.