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ENT-13766: Fixes / improvements / security hardning #2131

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18e3b4d
Suppress cleanup() errors for missing files
larsewi Mar 5, 2026
395180d
Export NO_CONFIGURE so it propagates to autogen.sh subprocesses
larsewi Mar 5, 2026
e02399e
Harden SSH on build hosts: disable root login and password auth
larsewi Mar 5, 2026
7d592b8
Install epel-release on all RHEL/CentOS versions
larsewi Mar 5, 2026
797e416
Install and configure fail2ban on all build hosts
larsewi Mar 5, 2026
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3 changes: 2 additions & 1 deletion build-scripts/autogen
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Original file line number Diff line number Diff line change
Expand Up @@ -61,7 +61,8 @@ for proj in $projects; do
log_debug "Running autogen.sh for project $proj..."
(
cd "$BASEDIR/$proj"
NO_CONFIGURE=1 run_and_print_on_failure ./autogen.sh
export NO_CONFIGURE=1
run_and_print_on_failure ./autogen.sh
Comment on lines -64 to +65
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@olehermanse olehermanse Mar 6, 2026

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@larsewi isn't this exactly the same?

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@olehermanse olehermanse Mar 6, 2026

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#!/bin/sh -e

echo 'echo "  In child script:       NO_CONFIGURE=${NO_CONFIGURE:-<unset>}"' > autogen.sh

run_and_print_on_failure() {
    echo "  Inside function:       NO_CONFIGURE=${NO_CONFIGURE:-<unset>}"
    bash -c 'echo "  In child process:      NO_CONFIGURE=${NO_CONFIGURE:-<unset>}"'
    bash $1
}

echo "=== Test 1: prefix assignment ==="
(
    NO_CONFIGURE=1 run_and_print_on_failure autogen.sh
)

echo ""
echo "=== Test 2: export ==="
(
    export NO_CONFIGURE=1
    run_and_print_on_failure autogen.sh
)
$ bash test.sh
=== Test 1: prefix assignment ===
  Inside function:       NO_CONFIGURE=1
  In child process:      NO_CONFIGURE=1
  In child script:       NO_CONFIGURE=1

=== Test 2: export ===
  Inside function:       NO_CONFIGURE=1
  In child process:      NO_CONFIGURE=1
  In child script:       NO_CONFIGURE=1

)
done

Expand Down
56 changes: 55 additions & 1 deletion ci/cfengine-build-host-setup.cf
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Expand Up @@ -24,6 +24,8 @@ bundle agent cfengine_build_host_setup
"ntp";

debian|ubuntu::
"fail2ban"
comment => "Ban IPs with repeated failed SSH auth attempts";
"libltdl7" package_policy => "delete";
"libltdl-dev" package_policy => "delete";
"binutils";
Expand Down Expand Up @@ -124,8 +126,11 @@ bundle agent cfengine_build_host_setup
"xfsprogs";

# note that shellcheck, fakeroot and ccache require epel-release to be installed
(redhat_7|centos_7).(yum_dnf_conf_ok)::
(redhat|centos).(yum_dnf_conf_ok)::
"epel-release";
"fail2ban"
comment => "Ban IPs with repeated failed SSH auth attempts";
(redhat_7|centos_7).(yum_dnf_conf_ok)::
"ccache";
"fakeroot";
"perl-JSON-PP";
Expand Down Expand Up @@ -262,6 +267,41 @@ root - core unlimited
* - core unlimited
");

"/etc/fail2ban/jail.local"
create => "true",
content => "[sshd]
enabled = true
port = ssh
maxretry = 5
bantime = 3600
findtime = 600",
classes => if_repaired("fail2ban_config_changed"),
comment => "Configure fail2ban to ban IPs after 5 failed SSH attempts within 10 minutes";

"/etc/ssh/sshd_config"
edit_line => comment_lines_matching("^PermitRootLogin\s+(?!no\s*$).*", "#"),
classes => if_repaired("sshd_hardened"),
comment => "Comment out insecure PermitRootLogin values";
"/etc/ssh/sshd_config"
edit_line => comment_lines_matching("^PasswordAuthentication\s+(?!no\s*$).*", "#"),
classes => if_repaired("sshd_hardened"),
comment => "Comment out insecure PasswordAuthentication value";
"/etc/ssh/sshd_config"
edit_line => comment_lines_matching("^KbdInteractiveAuthentication\s+(?!no\s*$).*", "#"),
classes => if_repaired("sshd_hardened"),
comment => "Comment out insecure KbdInteractiveAuthentication value (OpenSSH 8.7+)";
"/etc/ssh/sshd_config"
edit_line => comment_lines_matching("^ChallengeResponseAuthentication\s+(?!no\s*$).*", "#"),
classes => if_repaired("sshd_hardened"),
comment => "Comment out insecure ChallengeResponseAuthentication value (OpenSSH < 8.7)";
"/etc/ssh/sshd_config"
edit_line => lines_present("PermitRootLogin no
PasswordAuthentication no
KbdInteractiveAuthentication no
ChallengeResponseAuthentication no"),
classes => if_repaired("sshd_hardened"),
comment => "Ensure SSH hardening directives are present";

ubuntu_16|ubuntu_18|redhat_9|redhat_10::
"/etc/hosts" -> { "ENT-12437" }
edit_line => regex_replace("127.0.0.1 localhost localhost.localdomain","127.0.0.1 localhost.localdomain"),
Expand Down Expand Up @@ -343,6 +383,20 @@ jenkins_builds ALL=NOPASSWD: /usr/bin/podman
!have_sys_user.(suse|sles|opensuse)::
"useradd -u 3 sys" contain => in_shell;

services:
sshd_hardened::
"sshd"
service_policy => "restart",
comment => "Restart sshd to apply hardened configuration";
any::
"fail2ban"
service_policy => "start",
comment => "Ensure fail2ban is running";
fail2ban_config_changed::
"fail2ban"
service_policy => "restart",
comment => "Restart fail2ban to apply jail configuration";

# skip /etc/hosts change for now, seems kind of wrong and corrupts ip6 entries like `::1 ip6-ip6-loopback`
# maybe the following is needed to silence such errors as: ubuntu-16-mingw-j1: sudo: unable to resolve host localhost.localdomain
# ubuntu::
Expand Down
8 changes: 4 additions & 4 deletions ci/setup-cfengine-build-host.sh
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Expand Up @@ -37,11 +37,11 @@ function cleanup()
fi
echo "Cleaning up CFEngine install by moving to /var/bak.cfengine and /opt/bak.cfengine"
rm -rf /var/bak.cfengine
mv /var/cfengine /var/bak.cfengine || true
mv /var/cfengine /var/bak.cfengine 2>/dev/null || true
rm -rf /opt/bak.cfengine
mv /opt/cfengine /opt/bak.cfengine || true
mv /var/log/CFE* /var/bak.cfengine/ || true
mv /var/log/postgresql.log /var/bak.cfengine || true
mv /opt/cfengine /opt/bak.cfengine 2>/dev/null || true
mv /var/log/CFE* /var/bak.cfengine/ 2>/dev/null || true
mv /var/log/postgresql.log /var/bak.cfengine 2>/dev/null || true

if command -v pkill >/dev/null 2>&1; then
pkill -9 cf-agent || true
Expand Down