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GHSA-pch5-whg9-qr2r

netmask npm package mishandles octal input data

Source: GitHub Advisory Database (reviewed) Moderate CVE-2021-29418

Packages

EcosystemPackageAffectedFixed in
npm netmask < 2.0.1 2.0.1

Details

As written in the advisory (Markdown source, shown as plain text).

The netmask package before 2.0.1 for Node.js mishandles certain unexpected characters in an IP address string, such as an octal digit of 9. This (in some situations) allows attackers to bypass access control that is based on IP addresses. NOTE: this issue exists because of an incomplete fix for CVE-2021-28918.

References

External links from the advisory. They lead to third-party sites.