CVE-2021-27405: @progfay/scrapbox parser Denial of Service Vulnerability
MODERATECVE-2021-27405 is a MODERATE (CVSS 4.3) denial of service vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting @progfay/scrapbox parser libraries in the npm ecosystem. The issue involves regular expression denial of service in @progfay/scrapbox-parser. Remediation is available by upgrading affected packages to version 6.0.3, 7.0.2.
CVE-2021-27405 at a Glance
Security Impact
CVSS: 4.3
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L).
How to Fix CVE-2021-27405
To remediate this vulnerability, upgrade all affected @progfay/scrapbox parser dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
npm install @progfay/scrapbox-parser@6.0.3npm install @progfay/scrapbox-parser@7.0.2Run the following command in your project directory to verify that all resolved dependencies use the patched release:
npm ls @progfay/scrapbox-parserHow to Check if You Are Affected
To determine whether your Node.js application is affected by CVE-2021-27405, inspect your project dependencies using npm:
npm ls @progfay/scrapbox-parserAnalyze the terminal output to locate any version of @progfay/scrapbox parser in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 6.0.3), your application is affected.
Note: The npm ls @progfay/scrapbox-parser command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. In @progfay/scrapbox parser, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2021-27405 Affected @progfay/scrapbox parser Versions
2 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
@progfay/scrapbox-parser
|
npm |
< 6.0.3
|
6.0.3
|
|
@progfay/scrapbox-parser
|
npm |
≥ 7.0.0
< 7.0.2
|
7.0.2
|
References
Frequently Asked Questions
What is CVE-2021-27405?
Which @progfay/scrapbox parser versions are affected?
What version fixes CVE-2021-27405?
Is @progfay/scrapbox-parser affected?
What is the CVSS score of CVE-2021-27405?
What CWE is associated with CVE-2021-27405?
How can I check npm dependencies for CVE-2021-27405?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-9fhw-r42p-5c7r",
"modified" : "2021-02-26T19:49:07Z",
"published" : "2021-03-01T20:44:44Z",
"aliases" : [ "CVE-2021-27405" ],
"summary" : "Regular expression Denial of Service in @progfay/scrapbox-parser",
"details" : "### Impact\n\nA [Regular expression Denial of Service](https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS) flaw was found in the @progfay/scrapbox-parser package before 6.0.3, 7.0.2 for Node.js.\nThe attacker that is able to be parsed a specially crafted text may cause the application to consume an excessive amount of CPU.\n\n### Patches\n\nUpgrade to version 6.0.3, 7.0.2 or later.\n\n### Workarounds\n\nAvoid to parse text with a lot of `[` chars.\n\n### References\n\n* https://github.com/progfay/scrapbox-parser/pull/519\n* https://github.com/progfay/scrapbox-parser/pull/539\n* https://github.com/progfay/scrapbox-parser/pull/540\n* https://cve.mitre.org/cgi-bin/cvename.cgi?name=2021-27405\n* https://snyk.io/vuln/SNYK-JS-PROGFAYSCRAPBOXPARSER-1076803\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [github.com/progfay/scrapbox-parser](https://github.com/progfay/scrapbox-parser/issues)",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "npm",
"name" : "@progfay/scrapbox-parser"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "6.0.3"
} ]
} ]
}, {
"package" : {
"ecosystem" : "npm",
"name" : "@progfay/scrapbox-parser"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "7.0.0"
}, {
"fixed" : "7.0.2"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/progfay/scrapbox-parser/security/advisories/GHSA-9fhw-r42p-5c7r"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-27405"
}, {
"type" : "WEB",
"url" : "https://github.com/progfay/scrapbox-parser/pull/519"
}, {
"type" : "WEB",
"url" : "https://github.com/progfay/scrapbox-parser/pull/539"
}, {
"type" : "WEB",
"url" : "https://github.com/progfay/scrapbox-parser/pull/540"
}, {
"type" : "WEB",
"url" : "https://security.netapp.com/advisory/ntap-20210326-0002"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-400" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2021-02-26T19:49:07Z",
"nvd_published_at" : "2021-02-19T05:15:00Z"
}
}