55 lines
2.2 KiB
Bash
55 lines
2.2 KiB
Bash
 
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#!/bin/bash
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# CVE-2026-119618 (mod_http2 assign_headers heap corruption, httpd 2.4.55-2.4.70)
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# defense in depth. Nothing in WHP needs HTTP/2 or mod_md inside a container: the
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# HAProxy edge terminates h2/h3 and speaks HTTP/1.1 to backends, and certificates
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# come from the edge, not mod_md. So the modules are removed from every
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# Alma-based Apache image and this gate fails the build if they ever come back.
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#
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# httpd-h2-md-gate.sh remove uninstall mod_http2 / mod_md RPMs (if present)
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# httpd-h2-md-gate.sh check fail unless the modules cannot load, `httpd -t`
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# passes, and record the httpd version
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#
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# Both are idempotent and safe on images with no Apache at all (a no-op).
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set -euo pipefail
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BAD_MODULES='http2_module|proxy_http2_module|md_module'
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MOD_PKGS='mod_http2 mod_md'
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cmd_remove() {
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local p present=()
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for p in $MOD_PKGS; do
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rpm -q "$p" >/dev/null 2>&1 && present+=("$p")
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done
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if [ "${#present[@]}" -gt 0 ]; then
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dnf remove -y "${present[@]}"
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fi
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# Belt and braces if a package was removed but a module file was left behind.
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rm -f /etc/httpd/conf.modules.d/10-h2.conf /etc/httpd/conf.modules.d/10-proxy_h2.conf \
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/etc/httpd/conf.modules.d/*-md.conf \
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/usr/lib64/httpd/modules/mod_http2.so /usr/lib64/httpd/modules/mod_proxy_http2.so \
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/usr/lib64/httpd/modules/mod_md.so
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}
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cmd_check() {
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local p mods v fail=0
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command -v httpd >/dev/null 2>&1 || { echo "gate: no httpd binary" >&2; exit 1; }
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for p in $MOD_PKGS; do
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if rpm -q "$p" >/dev/null 2>&1; then echo "gate FAIL: RPM $p is installed" >&2; fail=1; fi
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done
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# Anchored on the module name column ("systemd_module" must NOT match md_module).
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mods=$(httpd -M 2>/dev/null) || { echo "gate FAIL: httpd -M failed" >&2; exit 1; }
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if printf '%s\n' "$mods" | grep -E "^ (${BAD_MODULES}) "; then
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echo "gate FAIL: HTTP/2 or mod_md module still loadable" >&2; fail=1
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fi
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[ "$fail" -eq 0 ] || exit 1
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httpd -t
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v=$(rpm -q --qf '%{VERSION}-%{RELEASE}' httpd-core)
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printf '%s\n' "$v" > /etc/whp-httpd-version
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echo "gate OK: httpd-core ${v}; no http2/proxy_http2/md modules; httpd -t passes"
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}
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case "${1:-}" in
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remove) cmd_remove ;;
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check) cmd_check ;;
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*) echo "usage: $0 remove|check" >&2; exit 2 ;;
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esac
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