CVE-2019-5477
9.8 · CRITICALOverview
CVE-2019-5477 is a critical-severity vulnerability affecting nokogiri nokogiri. It was published on August 16, 2019 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from nokogiri. Update nokogiri to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| nokogiri | nokogiri | 0 | Affected |
References
Frequently Asked Questions
What is CVE-2019-5477?
CVE-2019-5477 is a critical-severity vulnerability affecting nokogiri nokogiri. It was published on August 16, 2019 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
How severe is CVE-2019-5477?
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2019-5477?
Check the references section for vendor advisories and patches from nokogiri. Update nokogiri to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2019-5477?
CyberStrike's AI-powered security agents can automatically detect CVE-2019-5477 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
AI-driven PR review catches vulnerable dependencies before they ship.
Browser-based exploitation validates findings with real proof-of-concept.
Related CRITICAL CVEs from 2019
View all →FasterXML jackson-databind 2.x before 2.9.7 might allow remote attackers to conduct server-side requ
Zoho ManageEngine ADSelfService Plus 5.x before build 5703 has SSRF.
Juniper ATP ships with hard coded credentials in the Web Collector instance which gives an attacker
Juniper ATP ships with hard coded credentials in the Cyphort Core instance which gives an attacker t
MailEnable before 8.60 allows XXE via an XML document in the request.aspx Options parameter.
A reliance on a static, hard-coded credential in the design of the cloud-based storage system of Pra
An earlier fix for an Inter-process Communication (IPC) vulnerability, CVE-2011-3079, added authenti
An exploitable heap overflow vulnerability exists in the WkbProgramLow function of WibuKey Network s
A memory corruption issue was addressed with improved validation. This issue is fixed in iOS 12.1.3,
The REST API component of TIBCO Software Inc.'s TIBCO JasperReports Server, TIBCO JasperReports Serv
Kibana versions before 5.6.15 and 6.6.1 contain an arbitrary code execution flaw in the Timelion vis
An SSRF vulnerability was found in an API from Ctrip Apollo through 1.4.0-SNAPSHOT. An attacker may