Handlebars before 4.4.5 allows Regular Expression Denial of Service (ReDoS) because of eager matching. The parser may be forced into an endless loop while processing crafted templates. This may allow attackers to exhaust system resources.
Mend Note: Converted from WS-2019-0491, on 2022-11-08.
CVE-2019-20922 - High Severity Vulnerability
Handlebars provides the power necessary to let you build semantic templates effectively with no frustration
Library home page: https://registry.npmjs.org/handlebars/-/handlebars-4.0.11.tgz
Path to dependency file: /svgs/package.json
Path to vulnerable library: /node_modules/nyc/node_modules/handlebars/package.json
Dependency Hierarchy: - nyc-13.0.1.tgz (Root Library) - istanbul-reports-2.0.0.tgz - :x: **handlebars-4.0.11.tgz** (Vulnerable Library)
Found in base branch: master
Handlebars before 4.4.5 allows Regular Expression Denial of Service (ReDoS) because of eager matching. The parser may be forced into an endless loop while processing crafted templates. This may allow attackers to exhaust system resources. Mend Note: Converted from WS-2019-0491, on 2022-11-08.
Publish Date: 2020-09-30
URL: CVE-2019-20922
Base Score Metrics: - Exploitability Metrics: - Attack Vector: Network - Attack Complexity: Low - Privileges Required: None - User Interaction: None - Scope: Unchanged - Impact Metrics: - Confidentiality Impact: None - Integrity Impact: None - Availability Impact: High
For more information on CVSS3 Scores, click here.Type: Upgrade version
Origin: https://www.npmjs.com/advisories/1300
Release Date: 2020-09-30
Fix Resolution (handlebars): 4.4.5
Direct dependency fix Resolution (nyc): 13.1.0
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