Jakob Wennberg
dd7a2eab5f
The scheduled image scan has been red since 2026-08-30 on fixable HIGH CVE-2026-14456 (libssl3/libcrypto3 3.5.7-r0, fixed 3.5.8-r0). Both Dockerfile stages already run apk upgrade, but the GHCR buildx layer cache freezes that layer, so post-pin fixes never reach the published image. Bumping the pinned FROM digest (alpine 3.23 to 3.24.1) busts the cache and the re-run upgrade installs 3.5.8-r0 (verified in both new bases). cron.Dockerfile gains the same apk upgrade line.
37 lines
1.9 KiB
Docker
37 lines
1.9 KiB
Docker
FROM alpine:3.24@sha256:28bd5fe8b56d1bd048e5babf5b10710ebe0bae67db86916198a6eec434943f8b
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ARG SUPERCRONIC_VERSION=v0.2.33
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ARG TARGETARCH
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# SHA-256 of the supercronic v0.2.33 release binaries.
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# Computed from https://github.com/aptible/supercronic/releases/download/v0.2.33/
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# (the upstream project publishes only SHA-1 checksums, so these are recorded here).
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# Bump manually when SUPERCRONIC_VERSION changes (the FROM digest is also bumped manually).
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ARG SUPERCRONIC_SHA256_AMD64=feefa310da569c81b99e1027b86b27b51e6ee9ab647747b49099645120cfc671
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ARG SUPERCRONIC_SHA256_ARM64=f1f8585c66de020fef494dd636058f99949d108f569fef00016a1c8b9eb145b3
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# curl stays in the image: the crontab uses it at runtime to call the app.
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# `apk upgrade` first: it patches OS packages (e.g. libssl3/libcrypto3) that
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# have fixes published after the pinned base digest was built, same rationale
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# as the main Dockerfile. The digest stays pinned; only security patches float.
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RUN apk upgrade --no-cache \
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&& apk add --no-cache curl \
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&& case ${TARGETARCH} in \
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amd64) ARCH=linux-amd64; SHA=${SUPERCRONIC_SHA256_AMD64} ;; \
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arm64) ARCH=linux-arm64; SHA=${SUPERCRONIC_SHA256_ARM64} ;; \
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*) ARCH=linux-amd64; SHA=${SUPERCRONIC_SHA256_AMD64} ;; \
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esac \
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&& curl -fsSL "https://github.com/aptible/supercronic/releases/download/${SUPERCRONIC_VERSION}/supercronic-${ARCH}" \
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-o /usr/local/bin/supercronic \
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&& echo "${SHA} /usr/local/bin/supercronic" | sha256sum -c - \
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&& chmod 0755 /usr/local/bin/supercronic
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# Run as the alpine-built-in unprivileged user. Defense-in-depth alongside
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# cap_drop:[ALL] and read_only:true in docker-compose.yml. The crontab is
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# bind-mounted read-only with default 644 perms (readable by all), and the
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# supercronic binary is world-executable (chmod 0755 above).
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USER nobody:nobody
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ENTRYPOINT ["supercronic"]
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CMD ["/etc/supercronic/crontab"]
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