Vulnerability in Netmask Project
CVE-2021-28918
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.167 (96.9th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 96.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.167 · newest: 0.167 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.npmjs.com/package/netmask (Product, Third Party Advisory)
- github.com/rs/node-netmask (Third Party Advisory)
- www.bleepingcomputer.com/news/security/critical-netmask-networking-bug-impacts-… (Exploit, Third Party Advisory, Press/Media Coverage)
- github.com/advisories/GHSA-pch5-whg9-qr2r (Third Party Advisory)
- github.com/sickcodes/security/blob/master/advisories/SICK-2021-011.md (Exploit, Third Party Advisory)
- security.netapp.com/advisory/ntap-20210528-0010/ (Third Party Advisory)
- rootdaemon.com/2021/03/29/vulnerability-in-netmask-npm-package-affects-280000-p… (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-28918?
- CVE-2021-28918 is a critical-severity vulnerability in Netmask Project, classified under Incorrect Type Conversion or Cast. CVSS score: 9.1/10. Published 2021-04-01.
- How severe is CVE-2021-28918?
- Critical severity. CVSS v3 base score is 9.1 out of 10.
- Is CVE-2021-28918 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.