chore(security): upgrade gnutls + netty for CVE batch (UID2-7030, UID2-7031..7035)

* Dockerfile: install gnutls 3.8.13-r0 to fix CVE-2026-3833 (also clears
  the previously suppressed CVE-2026-1584, CVE-2026-33845, CVE-2026-33846).
* pom.xml: bump netty 4.1.132.Final → 4.1.133.Final to fix
  CVE-2026-42583 / 42579 / 42584 / 42587.
* .trivyignore: remove the three obsolete gnutls suppressions and add
  CVE-2026-42577 (server-side epoll DoS, no 4.1.x patch backported by
  upstream — service is behind authenticated LB; CVSS impact is
  Availability only).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: sophia-chen-ttd

.trivyignore

@@ -2,16 +2,15 @@
 # See https://aquasecurity.github.io/trivy/v0.35/docs/vulnerability/examples/filter/
 # for more details
 
-# gnutls DoS vulnerability via crafted ClientHello - not impactful as gnutls is not used by our Java service
-# See: UID2-6655
-CVE-2026-1584 exp:2026-08-27
-# gnutls DoS vulnerability via DTLS zero-length record - not impactful as gnutls is not used by our Java service
-# See: UID2-7008
-CVE-2026-33845 exp:2026-11-04
-# gnutls DoS vulnerability via heap buffer overflow in DTLS handshake - not impactful as gnutls is not used by our Java service
-# See: UID2-7012
-CVE-2026-33846 exp:2026-11-05
-
 # jackson-core async parser DoS - not exploitable, services only use synchronous ObjectMapper API
 # See: UID2-6670
 GHSA-72hv-8253-57qq exp:2026-09-01
+
+# CVE-2026-42577 — netty-transport-native-epoll DoS via RST on half-closed TCP connection.
+# Advisory: https://github.com/netty/netty/security/advisories/GHSA-rwm7-x88c-3g2p
+# Server-side bug; netty maintainers backported the fix only to 4.2.13.Final and we run on
+# vert.x 4 / netty 4.1.x. This service sits behind authenticated load balancers (mTLS / API
+# gateway) so anonymous external attackers cannot reach the netty epoll socket directly;
+# LB-level connection limits and idle timeouts further cap the blast radius. CVSS impact is
+# Availability only (C:N/I:N/A:H). Tracking via UID2-7035; revisit on vert.x 5 migration.
+CVE-2026-42577 exp:2026-06-08

Dockerfile

@@ -16,7 +16,7 @@ COPY ./target/${JAR_NAME}-${JAR_VERSION}-sources.jar /app
 COPY ./conf/default-config.json /app/conf/
 COPY ./conf/*.xml /app/conf/
 
-RUN apk add --no-cache --upgrade libpng libcrypto3 libssl3 musl musl-utils && adduser -D uid2-core && mkdir -p /app && chmod 705 -R /app && mkdir -p /app/file-uploads && chmod 777 -R /app/file-uploads && mkdir -p /app/pod_terminating && chmod 777 -R /app/pod_terminating
+RUN apk add --no-cache --upgrade libpng libcrypto3 libssl3 musl musl-utils gnutls && adduser -D uid2-core && mkdir -p /app && chmod 705 -R /app && mkdir -p /app/file-uploads && chmod 777 -R /app/file-uploads && mkdir -p /app/pod_terminating && chmod 777 -R /app/pod_terminating
 USER uid2-core
 
 CMD java \

pom.xml

@@ -25,7 +25,7 @@
         <launcher.class>io.vertx.core.Launcher</launcher.class>
 
         <uid2-shared.version>11.4.16</uid2-shared.version>
-        <netty.version>4.1.132.Final</netty.version>
+        <netty.version>4.1.133.Final</netty.version>
         <image.version>${project.version}</image.version>
     </properties>