diff --git a/sdk_container/src/third_party/coreos-overlay/app-crypt/trousers/files/system.data b/sdk_container/src/third_party/coreos-overlay/app-crypt/trousers/files/system.data
new file mode 100644
index 0000000000..b498fd495d
--- /dev/null
+++ b/sdk_container/src/third_party/coreos-overlay/app-crypt/trousers/files/system.data
@@ -0,0 +1 @@
+/
diff --git a/sdk_container/src/third_party/coreos-overlay/app-crypt/trousers/files/tcsd.service b/sdk_container/src/third_party/coreos-overlay/app-crypt/trousers/files/tcsd.service
index 4a46e6143b..c4dc803dfc 100644
--- a/sdk_container/src/third_party/coreos-overlay/app-crypt/trousers/files/tcsd.service
+++ b/sdk_container/src/third_party/coreos-overlay/app-crypt/trousers/files/tcsd.service
@@ -1,8 +1,11 @@
 [Unit]
 Description=TCG Core Services Daemon
+ConditionPathExists=/dev/tpm0
+ConditionSecurity=!tpm2
 
 [Service]
 User=tss
+ExecCondition=/bin/bash -c "/usr/bin/test $(cat /sys/class/tpm/*/tpm_version_major | grep -m 1 1 || echo 0) -eq 1"
 ExecStart=/usr/sbin/tcsd -f
 
 [Install]
diff --git a/sdk_container/src/third_party/coreos-overlay/app-crypt/trousers/files/tmpfiles.d/trousers.conf b/sdk_container/src/third_party/coreos-overlay/app-crypt/trousers/files/tmpfiles.d/trousers.conf
new file mode 100644
index 0000000000..ad2171ad3d
--- /dev/null
+++ b/sdk_container/src/third_party/coreos-overlay/app-crypt/trousers/files/tmpfiles.d/trousers.conf
@@ -0,0 +1,3 @@
+d /var/lib/tpm 0755 tss tss - -
+C /etc/tcsd.conf 0640 root tss - /usr/share/trousers/tcsd.conf
+C /var/lib/tpm/system.data 0600 tss tss - /usr/share/trousers/system.data
diff --git a/sdk_container/src/third_party/coreos-overlay/app-crypt/trousers/files/trousers-0.3.14-CVE-2020-24330_CVE-2020-24331_CVE-2020-24332.patch b/sdk_container/src/third_party/coreos-overlay/app-crypt/trousers/files/trousers-0.3.14-CVE-2020-24330_CVE-2020-24331_CVE-2020-24332.patch
new file mode 100644
index 0000000000..10031e0882
--- /dev/null
+++ b/sdk_container/src/third_party/coreos-overlay/app-crypt/trousers/files/trousers-0.3.14-CVE-2020-24330_CVE-2020-24331_CVE-2020-24332.patch
@@ -0,0 +1,58 @@
+Index: trousers-0.3.14/src/tcs/ps/tcsps.c
+===================================================================
+--- trousers-0.3.14.orig/src/tcs/ps/tcsps.c
++++ trousers-0.3.14/src/tcs/ps/tcsps.c
+@@ -72,7 +72,7 @@ get_file()
+ 	}
+ 
+ 	/* open and lock the file */
+-	system_ps_fd = open(tcsd_options.system_ps_file, O_CREAT|O_RDWR, 0600);
++	system_ps_fd = open(tcsd_options.system_ps_file, O_CREAT|O_RDWR|O_NOFOLLOW, 0600);
+ 	if (system_ps_fd < 0) {
+ 		LogError("system PS: open() of %s failed: %s",
+ 				tcsd_options.system_ps_file, strerror(errno));
+Index: trousers-0.3.14/src/tcsd/svrside.c
+===================================================================
+--- trousers-0.3.14.orig/src/tcsd/svrside.c
++++ trousers-0.3.14/src/tcsd/svrside.c
+@@ -473,6 +473,7 @@ main(int argc, char **argv)
+ 		}
+ 		return TCSERR(TSS_E_INTERNAL_ERROR);
+ 	}
++	setgid(pwd->pw_gid);
+ 	setuid(pwd->pw_uid);
+ #endif
+ #endif
+Index: trousers-0.3.14/src/tcsd/tcsd_conf.c
+===================================================================
+--- trousers-0.3.14.orig/src/tcsd/tcsd_conf.c
++++ trousers-0.3.14/src/tcsd/tcsd_conf.c
+@@ -743,7 +743,7 @@ conf_file_init(struct tcsd_config *conf)
+ #ifndef SOLARIS
+ 	struct group *grp;
+ 	struct passwd *pw;
+-	mode_t mode = (S_IRUSR|S_IWUSR);
++	mode_t mode = (S_IRUSR|S_IWUSR|S_IRGRP);
+ #endif /* SOLARIS */
+ 	TSS_RESULT result;
+ 
+@@ -798,15 +798,15 @@ conf_file_init(struct tcsd_config *conf)
+ 	}
+ 
+ 	/* make sure user/group TSS owns the conf file */
+-	if (pw->pw_uid != stat_buf.st_uid || grp->gr_gid != stat_buf.st_gid) {
++	if (stat_buf.st_uid != 0 || grp->gr_gid != stat_buf.st_gid) {
+ 		LogError("TCSD config file (%s) must be user/group %s/%s", tcsd_config_file,
+-				TSS_USER_NAME, TSS_GROUP_NAME);
++				"root", TSS_GROUP_NAME);
+ 		return TCSERR(TSS_E_INTERNAL_ERROR);
+ 	}
+ 
+-	/* make sure only the tss user can manipulate the config file */
++	/* make sure only the tss user can read (but not manipulate) the config file */
+ 	if (((stat_buf.st_mode & 0777) ^ mode) != 0) {
+-		LogError("TCSD config file (%s) must be mode 0600", tcsd_config_file);
++		LogError("TCSD config file (%s) must be mode 0640", tcsd_config_file);
+ 		return TCSERR(TSS_E_INTERNAL_ERROR);
+ 	}
+ #endif /* SOLARIS */
diff --git a/sdk_container/src/third_party/coreos-overlay/app-crypt/trousers/trousers-0.3.14-r2.ebuild b/sdk_container/src/third_party/coreos-overlay/app-crypt/trousers/trousers-0.3.14-r2.ebuild
index a36ff68307..b00c14f14c 100644
--- a/sdk_container/src/third_party/coreos-overlay/app-crypt/trousers/trousers-0.3.14-r2.ebuild
+++ b/sdk_container/src/third_party/coreos-overlay/app-crypt/trousers/trousers-0.3.14-r2.ebuild
@@ -1,9 +1,15 @@
+# Flatcar modifications:
+# - added "Flatcar:" customizations
+# - added condition to files/tcsd.service
+# - created files/tmpfiles.d/trousers.conf
+# - created files/system.data
 # Copyright 1999-2020 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=7
 
-inherit autotools linux-info readme.gentoo-r1 systemd udev
+TMPFILES_OPTIONAL=1
+inherit autotools linux-info readme.gentoo-r1 systemd tmpfiles udev
 
 DESCRIPTION="An open-source TCG Software Stack (TSS) v1.1 implementation"
 HOMEPAGE="http://trousers.sf.net"
@@ -31,6 +37,7 @@ PATCHES=(
 	"${FILESDIR}/${P}-libressl.patch"
 	"${FILESDIR}/${P}-fno-common.patch"
 	"${FILESDIR}/${P}-Makefile.am-Mark-tddl.a-nodist.patch"
+	"${FILESDIR}/${P}-CVE-2020-24330_CVE-2020-24331_CVE-2020-24332.patch"
 )
 
 DOCS="AUTHORS ChangeLog NICETOHAVES README TODO"
@@ -59,10 +66,26 @@ src_install() {
 
 	keepdir /var/lib/tpm
 	use doc && dodoc doc/*
-	newinitd "${FILESDIR}"/tcsd.initd tcsd
-	newconfd "${FILESDIR}"/tcsd.confd tcsd
+	# Flatcar: Comment out the openrc stuff.
+	# newinitd "${FILESDIR}"/tcsd.initd tcsd
+	# newconfd "${FILESDIR}"/tcsd.confd tcsd
+	fowners root:tss /etc/tcsd.conf
+
 	systemd_dounit "${FILESDIR}"/tcsd.service
+
+	# Flatcar:
+	systemd_enable_service multi-user.target tcsd.service
+
 	udev_dorules "${FILESDIR}"/61-trousers.rules
 	fowners tss:tss /var/lib/tpm
 	readme.gentoo_create_doc
+
+	# Flatcar:
+	insinto /usr/share/trousers/
+	doins "${FILESDIR}"/system.data
+	# stash a copy of the config so we can restore it from tmpfiles
+	doins "${D}"/etc/tcsd.conf
+	fowners tss:tss /usr/share/trousers/system.data
+	fowners root:tss /usr/share/trousers/tcsd.conf
+	dotmpfiles "${FILESDIR}"/tmpfiles.d/trousers.conf
 }