Is CVE-2019-5477 in the CISA KEV catalog?

No. CVE-2019-5477 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2019-5477?

CVE-2019-5477 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2019-5477?

CVE-2019-5477 has an EPSS score of 5.90% (92th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-5477?

Upgrade rexical on debian 11 to 1.0.7-1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2019-5477

CRITICALEPSS 92th pctl

9.8

CVSS v3

NVD

Description

A command injection vulnerability in Nokogiri v1.10.3 and earlier allows commands to be executed in a subprocess via Ruby's `Kernel.open` method. Processes are vulnerable only if the undocumented method `Nokogiri::CSS::Tokenizer#load_file` is being called with unsafe user input as the filename. This vulnerability appears in code generated by the Rexical gem versions v1.0.6 and earlier. Rexical is used by Nokogiri to generate lexical scanner code for parsing CSS queries. The underlying vulnerability was addressed in Rexical v1.0.7 and Nokogiri upgraded to this version of Rexical in Nokogiri v1.10.4.

CWE-78OS Command Injection

How to fix

Remediation Available

rexicalDebian

Fixed in:1.0.7-1CVE-2019-5477

ruby-nokogiriUbuntu

Fixed in:1.6.7.2-3ubuntu0.1USN-4175-1

Fixed in:1.8.2-1ubuntu0.1USN-4175-1

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 ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

5.90%probability of exploitation in 30 days

92ndpercentile

High risk: more likely to be exploited than 92% of all known CVEs.

References

Patch1

github.com

Third-Party Advisory5

Release Notes1

github.com

Other references1

hackerone.com

Related Vulnerabilities

Other CWE-78 (OS Command Injection) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2021-1498	Critical	9.8	100%	KEV	Fix
CVE-2014-6271	Critical	9.8	100%	KEV	Fix
CVE-2019-16920	Critical	9.8	100%	KEV	-
CVE-2022-44877	Critical	9.8	100%	KEV	Fix
CVE-2020-8515	Critical	9.8	100%	KEV	-
CVE-2020-9054	Critical	9.8	100%	KEV	Fix

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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.