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fix(docker): upgrade the trust store in its own layer and fail the build if the emSign root survives #16452

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Merged
devGregA merged 2 commits into from
Oct 21, 2026
Merged

fix(docker): upgrade the trust store in its own layer and fail the build if the emSign root survives #16452

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52192c2
fix(docker): upgrade ca-certificates in its own layer
devGregA Oct 21, 2026
5c97b4d
fix(docker): fail the build if the distrusted emSign root is still tr…
devGregA Oct 21, 2026
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9 changes: 9 additions & 0 deletions Dockerfile.django-alpine
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Original file line number Diff line number Diff line change
Expand Up @@ -57,6 +57,12 @@ RUN \
&& \
rm -rf /var/cache/apk/* && \
true
# Upgrade the system trust store in its own layer. Release builds reuse the layer
# above from the build cache, so an OS security fix to ca-certificates (here the
# eMudhra key compromise, 2026-10-20) would otherwise never reach the image.
# Bump CA_REFRESH to force this layer to rebuild for the next trust-store fix.
ARG CA_REFRESH=2026-10-20
RUN echo "trust store refresh ${CA_REFRESH}" && apk upgrade --no-cache ca-certificates-bundle ca-certificates
RUN \
--mount=from=build,src=/tmp/wheels,target=/tmp/wheels \
--mount=from=build,src=/app/requirements.txt,target=/app/requirements.txt \
Expand All @@ -65,6 +71,9 @@ RUN \
--no-index \
--find-links=/tmp/wheels \
-r ./requirements.txt
# Fail the build if either trust store still carries the root distrusted after the
# eMudhra key compromise (2026-10-20), so a cached or stale layer can't ship it.
RUN python3 -c "import ssl, sys, certifi; bad = [f for f in ('/etc/ssl/certs/ca-certificates.crt', certifi.where()) if (lambda ctx: ctx.load_verify_locations(cafile=f) or any(dict(x[0] for x in c['subject']).get('commonName') == 'emSign ECC Root CA - G3' for c in ctx.get_ca_certs()))(ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT))]; sys.exit('distrusted root emSign ECC Root CA - G3 still in: ' + ', '.join(bad) if bad else 0)"

COPY \
docker/entrypoint-celery-beat.sh \
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15 changes: 15 additions & 0 deletions Dockerfile.django-debian
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Original file line number Diff line number Diff line change
Expand Up @@ -70,6 +70,18 @@ RUN \
apt-get clean && \
rm -rf /var/lib/apt/lists && \
true
# Upgrade the system trust store in its own layer. Release builds reuse the layer
# above from the build cache, so an OS security fix to ca-certificates (here the
# eMudhra key compromise, 2026-10-20) would otherwise never reach the image.
# Bump CA_REFRESH to force this layer to rebuild for the next trust-store fix.
ARG CA_REFRESH=2026-10-20
RUN \
echo "trust store refresh ${CA_REFRESH}" && \
apt-get -y update && \
apt-get -y install --no-install-recommends --only-upgrade ca-certificates && \
apt-get clean && \
rm -rf /var/lib/apt/lists && \
true
RUN \
--mount=from=build,src=/tmp/wheels,target=/tmp/wheels \
--mount=from=build,src=/app/requirements.txt,target=/app/requirements.txt \
Expand All @@ -79,6 +91,9 @@ RUN \
--find-links=/tmp/wheels \
-r ./requirements.txt && \
apt-get -y purge --auto-remove git
# Fail the build if either trust store still carries the root distrusted after the
# eMudhra key compromise (2026-10-20), so a cached or stale layer can't ship it.
RUN python3 -c "import ssl, sys, certifi; bad = [f for f in ('/etc/ssl/certs/ca-certificates.crt', certifi.where()) if (lambda ctx: ctx.load_verify_locations(cafile=f) or any(dict(x[0] for x in c['subject']).get('commonName') == 'emSign ECC Root CA - G3' for c in ctx.get_ca_certs()))(ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT))]; sys.exit('distrusted root emSign ECC Root CA - G3 still in: ' + ', '.join(bad) if bad else 0)"

COPY \
docker/entrypoint-celery-beat.sh \
Expand Down
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