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CVE-2021-29418

netmask npm package mishandles octal input data

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.

Patch Available

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Fix without upgrading
Vulnerability Details
Score
5.3
Score Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Affected Versions
netmask < 2.0.1
Severity
Medium
Ecosystem
JavaScript
Publish Date
March 29, 2021
Modified Date
January 14, 2025