Impact

A Regular expression Denial of Service flaw was found in the @progfay/scrapbox-parser package before 6.0.3, 7.0.2 for Node.js.
The attacker that is able to be parsed a specially crafted text may cause the application to consume an excessive amount of CPU.

Patches

Upgrade to version 6.0.3, 7.0.2 or later.

Workarounds

Avoid to parse text with a lot of [ chars.

References

• progfay/scrapbox-parser#519
• progfay/scrapbox-parser#539
• progfay/scrapbox-parser#540
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=2021-27405
• https://snyk.io/vuln/SNYK-JS-PROGFAYSCRAPBOXPARSER-1076803

For more information

If you have any questions or comments about this advisory:

• Open an issue in github.com/progfay/scrapbox-parser

References

• GHSA-9fhw-r42p-5c7r
• https://nvd.nist.gov/vuln/detail/CVE-2021-27405
• progfay/scrapbox-parser#519
• progfay/scrapbox-parser#539
• progfay/scrapbox-parser#540
• https://security.netapp.com/advisory/ntap-20210326-0002/