Vulnerability in Ipmatcher Project
CVE-2021-33318
An Input Validation Vulnerability exists in Joel Christner .NET C# packages WatsonWebserver, IpMatcher 1.0.4.1 and below (IpMatcher) and 4.1.3 and below (WatsonWebserver) due to insufficient validation of input IP addresses and netmasks against the internal Matcher list of IP addresses and subnets.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.020 (80.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 80.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/jchristn/IpMatcher (Third Party Advisory)
- github.com/jchristn/WatsonWebserver (Third Party Advisory)
- github.com/kaoudis/advisories/blob/main/0-2021.md (Exploit, Third Party Advisory)
- github.com/jchristn/IpMatcher/commit/81d77c2f33aa912dbd032b34b9e184fc6e041d89 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-33318?
- CVE-2021-33318 is a critical-severity vulnerability in Ipmatcher Project, classified under Incorrect Type Conversion or Cast. CVSS score: 9.8/10. Published 2022-05-16.
- How severe is CVE-2021-33318?
- Critical severity. CVSS v3 base score is 9.8 out of 10.