Find real vulnerabilities before they ship
Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, Netty's DNS codec does not enforce RFC 1035 domain name constraints during either encoding or decoding. This creates a bidirectional attack surface: malicious DNS responses can exploit the decoder, and user-influenced hostnames can exploit the encoder. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final.
Base Score
9.1| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| io.netty:netty-codec-dns(Maven) | 4.2.0.Alpha1 | 4.2.13.Final | N/A |
| io.netty:netty-codec-dns(Maven) | 0 | 4.1.133.Final | N/A |
| Base Score | 9.1 |
|---|---|
| Vector String | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H |
| Base Severity | Critical |
| Version | 3.1 |
| Attack Vector (AV) | NETWORK |
