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CVE-2021-28918

CRITICAL
9.1
CVSS Score
Published: April 1, 2021 at 12:33 PM UTC
Updated: June 17, 2026 at 03:47 AM UTC
1 product affected across 1 vendorNetmask

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Severity
CRITICAL9.1
Exploit prediction
EPSS 15%

Description

Improper input validation of octal strings in netmask npm package v1.0.6 and below allows unauthenticated remote attackers to perform indeterminate SSRF, RFI, and LFI attacks on many of the dependent packages. A remote unauthenticated attacker can bypass packages relying on netmask to filter IPs and reach critical VPN or LAN hosts.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Netmask· Netmask Projectnpm
95%
v ≤ 1.0.6

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (7)

x_refsource_MISCThird Party Advisory
Source: [email protected]
https://github.com/advisories/GHSA-pch5-whg9-qr2r
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://github.com/rs/node-netmask
x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://github.com/sickcodes/security/blob/master/advisories/SICK-2021-011.md
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://rootdaemon.com/2021/03/29/vulnerability-in-netmask-npm-package-affects-280000-projects/
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://security.netapp.com/advisory/ntap-20210528-0010/
x_refsource_MISCExploitPress/Media CoverageThird Party Advisory
Source: [email protected]
https://www.bleepingcomputer.com/news/security/critical-netmask-networking-bug-impacts-thousands-of-applications/
x_refsource_MISCProductThird Party Advisory
Source: [email protected]
https://www.npmjs.com/package/netmask

CVSS

9.1CRITICAL[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-704

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