{"id":"GHSA-57m8-f3v5-hm5m","summary":"Withdrawn Advisory: Netty-handler does not validate host names by default","details":"## Withdrawn Advisory\nThis advisory has been withdrawn because the underlying vulnerability only concerns Red Hat's Hot Rod client, which is not in one of the GitHub Advisory Database's [supported ecosystems](https://github.com/github/advisory-database/blob/main/README.md#supported-ecosystems). This link is maintained to preserve external references.\n\n## Original Description\nNetty-handler has been found to no validate hostnames when using TLS in its default configuration. As a result netty-handler is vulnerable to man-in-the-middle attacks. Users would need to set the protocol to \"HTTPS\" in the SSLParameters of the SSLEngine to opt in to host name validation. A change in default behavior is expected in the `5.x` release branch with no backport planned.\n\nIn the interim users are advised to enable host name validation in their configurations.\nSee https://github.com/netty/netty/issues/8537 for details on the forthcoming change in default behavior.","aliases":["CVE-2023-4586"],"modified":"2026-09-10T03:50:03.467623256Z","published":"2023-10-04T12:30:14Z","withdrawn":"2023-11-01T17:54:21Z","database_specific":{"nvd_published_at":"2023-10-04T11:15:10Z","cwe_ids":["CWE-295"],"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2023-10-04T20:27:04Z"},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-4586"},{"type":"WEB","url":"https://github.com/netty/netty/issues/8537"},{"type":"WEB","url":"https://access.redhat.com/security/cve/CVE-2023-4586"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2235564"},{"type":"WEB","url":"https://docs.oracle.com/javase/8/docs/api/javax/net/ssl/SSLParameters.html#setEndpointIdentificationAlgorithm-java.lang.String-"},{"type":"PACKAGE","url":"https://github.com/netty/netty"},{"type":"WEB","url":"https://security.snyk.io/vuln/SNYK-JAVA-IONETTY-1042268"}],"affected":[{"package":{"name":"io.netty:netty-handler","ecosystem":"Maven","purl":"pkg:maven/io.netty/netty-handler"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.1.0.Final"},{"last_affected":"4.1.99.Final"}]}],"versions":["4.1.0.Final","4.1.1.Final","4.1.10.Final","4.1.11.Final","4.1.12.Final","4.1.13.Final","4.1.14.Final","4.1.15.Final","4.1.16.Final","4.1.17.Final","4.1.18.Final","4.1.19.Final","4.1.2.Final","4.1.20.Final","4.1.21.Final","4.1.22.Final","4.1.23.Final","4.1.24.Final","4.1.25.Final","4.1.26.Final","4.1.27.Final","4.1.28.Final","4.1.29.Final","4.1.3.Final","4.1.30.Final","4.1.31.Final","4.1.32.Final","4.1.33.Final","4.1.34.Final","4.1.35.Final","4.1.36.Final","4.1.37.Final","4.1.38.Final","4.1.39.Final","4.1.4.Final","4.1.40.Final","4.1.41.Final","4.1.42.Final","4.1.43.Final","4.1.44.Final","4.1.45.Final","4.1.46.Final","4.1.47.Final","4.1.48.Final","4.1.49.Final","4.1.5.Final","4.1.50.Final","4.1.51.Final","4.1.52.Final","4.1.53.Final","4.1.54.Final","4.1.55.Final","4.1.56.Final","4.1.57.Final","4.1.58.Final","4.1.59.Final","4.1.6.Final","4.1.60.Final","4.1.61.Final","4.1.62.Final","4.1.63.Final","4.1.64.Final","4.1.65.Final","4.1.66.Final","4.1.67.Final","4.1.68.Final","4.1.69.Final","4.1.7.Final","4.1.70.Final","4.1.71.Final","4.1.72.Final","4.1.73.Final","4.1.74.Final","4.1.75.Final","4.1.76.Final","4.1.77.Final","4.1.78.Final","4.1.79.Final","4.1.8.Final","4.1.80.Final","4.1.81.Final","4.1.82.Final","4.1.83.Final","4.1.84.Final","4.1.85.Final","4.1.86.Final","4.1.87.Final","4.1.88.Final","4.1.89.Final","4.1.9.Final","4.1.90.Final","4.1.91.Final","4.1.92.Final","4.1.93.Final","4.1.94.Final","4.1.95.Final","4.1.96.Final","4.1.97.Final","4.1.98.Final","4.1.99.Final"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/10/GHSA-57m8-f3v5-hm5m/GHSA-57m8-f3v5-hm5m.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"}]}