CVE-2021-28918

high-risk
Published 2021-04-01

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.

Do I need to act?

!
85.9% chance of exploitation in next 30 days
EPSS score — higher than 14% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.1/10 Critical
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Netmask Project

References (14)

Third Party Advisory https://github.com/advisories/GHSA-pch5-whg9-qr2r
Third Party Advisory https://github.com/rs/node-netmask
Exploit https://github.com/sickcodes/security/blob/master/advisories/SICK-2021-011.md
Third Party Advisory https://rootdaemon.com/2021/03/29/vulnerability-in-netmask-npm-package-affects-2...
Third Party Advisory https://security.netapp.com/advisory/ntap-20210528-0010/
Exploit https://www.bleepingcomputer.com/news/security/critical-netmask-networking-bug-i...
Product https://www.npmjs.com/package/netmask
Third Party Advisory https://github.com/advisories/GHSA-pch5-whg9-qr2r
Third Party Advisory https://github.com/rs/node-netmask
Exploit https://github.com/sickcodes/security/blob/master/advisories/SICK-2021-011.md
Third Party Advisory https://rootdaemon.com/2021/03/29/vulnerability-in-netmask-npm-package-affects-2...
Third Party Advisory https://security.netapp.com/advisory/ntap-20210528-0010/
Exploit https://www.bleepingcomputer.com/news/security/critical-netmask-networking-bug-i...
Product https://www.npmjs.com/package/netmask
56
/ 100
high-risk
Severity 31/34 · Critical
Exploitability 20/34 · Moderate
Exposure 5/34 · Minimal