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Accepting request 1130687 from home:ohollmann:branches:security

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- Remove haveged-switch-root.service because it's implemented incorrectly and
  neither upstream don't know how to fix it (#77). On the other hand, without
  this service haveged will be started from scratch after switch root so it's
  hopefully no big deal. Also remove patch for bsc#1203079 as it's considered
  as a security threat because of creating fixed name file in world-writable
  directory. [jsc#PED-6184, bsc#1206699]
  * Remove
    - haveged-switch-root.service
    - haveged-switch-root.patch

OBS-URL: https://build.opensuse.org/request/show/1130687
OBS-URL: https://build.opensuse.org/package/show/security/haveged?expand=0&rev=149
This commit is contained in:
Marcus Meissner 2023-12-04 09:40:17 +00:00 committed by Git OBS Bridge
parent 858bf80d64
commit 5eba5ca9bf
5 changed files with 15 additions and 242 deletions
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4
haveged-dracut.module
View File

@ -16,11 +16,9 @@ installkernel() {
install() {
inst_multiple -o \
/usr/sbin/haveged \
$systemdsystemunitdir/haveged.service \
$systemdsystemunitdir/haveged-switch-root.service
$systemdsystemunitdir/haveged.service
mkdir -p "$initdir/$systemdsystemunitdir/sysinit.target.wants"
mkdir -p "$initdir/$systemdsystemunitdir/initrd-switch-root.target.wants"
mkdir -p "$initdir/$systemdsystemunitdir/systemd-journald.service.wants"
ln_r "$systemdsystemunitdir/haveged.service" "$systemdsystemunitdir/systemd-journald.service.wants/haveged.service"
ln_r "$systemdsystemunitdir/haveged-switch-root.service" "$systemdsystemunitdir/initrd-switch-root.target.wants/haveged-switch-root.service"
}

198
haveged-switch-root.patch
View File

@ -1,198 +0,0 @@
From 6a6cf4de8e31981b0e8bd3e2cf37921a8a8d3d48 Mon Sep 17 00:00:00 2001
From: Otto Hollmann <otto.hollmann@suse.com>
Date: Mon, 14 Nov 2022 14:47:12 +0100
Subject: [PATCH 1/2] Synchronize haveged instances during switching root
---
src/havegecmd.c | 20 +++++++++++++++++---
src/havegecmd.h | 2 ++
src/haveged.c | 28 ++++++++++++++++++++++++++++
3 files changed, 47 insertions(+), 3 deletions(-)
diff --git a/src/havegecmd.c b/src/havegecmd.c
index 06a2367..e87767e 100644
--- a/src/havegecmd.c
+++ b/src/havegecmd.c
@@ -39,6 +39,7 @@
#include <sys/stat.h>
#include <sys/un.h>
#include <unistd.h>
+#include <semaphore.h>
#ifndef HAVE_STRUCT_UCRED
struct ucred
@@ -54,6 +55,7 @@ struct ucred
int first_byte;
int socket_fd;
static char errmsg[1024];
+extern sem_t *sem;
static int new_root( /* RETURN: status */
const char *root, /* IN: path of the new root file system */
@@ -95,6 +97,7 @@ static int new_root( /* RETURN: status */
strerror(errno));
goto err;
}
+ sem_close(sem);
ret = execv((const char *)path, argv);
if (ret < 0) {
snprintf(&errmsg[0], sizeof(errmsg)-1,
@@ -265,8 +268,14 @@ int socket_handler( /* RETURN: closed file descriptor */
}
if (magic[1] == '\002') { /* ASCII start of text: read argument provided */
- uint32_t alen;
-
+ uint32_t alen = 0;
+
+ /*
+ * wait for the haveged -c instance to finish writting
+ * before continuing to read from the socket
+ */
+ sem_wait(sem);
+ sem_post(sem);
ret = receive_uinteger(fd, &alen);
if (ret < 0) {
print_msg("%s: can not read from UNIX socket\n", params->daemon);
@@ -285,6 +294,11 @@ int socket_handler( /* RETURN: closed file descriptor */
print_msg("%s: can not read from UNIX socket\n", params->daemon);
goto out;
}
+ /*
+ * We no more need the semaphore unlink it
+ * Not sure if it is the best place to unlink here
+ */
+ sem_unlink(SEM_NAME);
}
clen = sizeof(struct ucred);
@@ -444,7 +458,7 @@ int receive_uinteger( /* RETURN: status */
int fd, /* IN: file descriptor */
uint32_t *value) /* OUT: 32 bit unsigned integer */
{
- uint8_t buffer[4];
+ uint8_t buffer[4] = {0};
if (safein(fd, buffer, 4 * sizeof(uint8_t)) < 0)
return -1;
diff --git a/src/havegecmd.h b/src/havegecmd.h
index 7765334..2f6fa96 100644
--- a/src/havegecmd.h
+++ b/src/havegecmd.h
@@ -49,6 +49,8 @@ extern "C" {
#define SOCK_NONBLOCK 0
#endif
+#define SEM_NAME "haveged_sem"
+
/**
* Open and listen on a UNIX socket to get command from there
*/
diff --git a/src/haveged.c b/src/haveged.c
index f668968..02c6c81 100644
--- a/src/haveged.c
+++ b/src/haveged.c
@@ -34,6 +34,7 @@
#include <sys/stat.h>
#include <unistd.h>
#include <time.h>
+#include <semaphore.h>
#ifndef NO_DAEMON
#include <syslog.h>
@@ -131,6 +132,8 @@ static void usage(int db, int nopts, struct option *long_options, const char **c
static sigset_t mask, omask;
+sem_t *sem = NULL;
+
#define ATOU(a) (unsigned int)atoi(a)
/**
* Entry point
@@ -360,6 +363,15 @@ int main(int argc, char **argv)
fd_set read_fd;
sigset_t block;
+ /* init semaphore */
+ sem = sem_open(SEM_NAME, 0);
+ if (sem == NULL) {
+ print_msg("sem_open() failed \n");
+ print_msg("Error : %s \n", strerror(errno));
+ ret = -1;
+ goto err;
+ }
+
socket_fd = cmd_connect(params);
if (socket_fd < 0) {
ret = -1;
@@ -377,9 +389,19 @@ int main(int argc, char **argv)
root = optarg;
size = (uint32_t)strlen(root)+1;
cmd[1] = '\002';
+ /*
+ * Synchronise haveged -c instance and daemon instance
+ * prevent daemon instance from readin messages
+ * from the socket until the -c instance finish writting
+ */
+ sem_wait(sem);
safeout(socket_fd, &cmd[0], 2);
send_uinteger(socket_fd, size);
safeout(socket_fd, root, size);
+ /*
+ * unblock the daemon instance as we finished writting
+ */
+ sem_post(sem);
break;
case MAGIC_CLOSE:
ptr = &cmd[0];
@@ -440,6 +462,7 @@ int main(int argc, char **argv)
}
err:
close(socket_fd);
+ sem_close(sem);
return ret;
}
else if (!(params->setup & RUN_AS_APP)){
@@ -455,6 +478,11 @@ int main(int argc, char **argv)
fprintf(stderr, "%s: disabling command mode for this instance\n", params->daemon);
}
}
+ /* Initilize named semaphore to synchronize command isntances */
+ sem = sem_open(SEM_NAME, O_CREAT, 0644, 1);
+ if (sem == NULL) {
+ error_exit("Couldn't create nammed semaphore " SEM_NAME" error: %s", strerror(errno));
+ }
}
#endif
if (params->tests_config == 0)
From 55dd6b7dc851df3ccf5e52019537f420e32450dd Mon Sep 17 00:00:00 2001
From: Otto Hollmann <otto.hollmann@suse.com>
Date: Mon, 21 Nov 2022 13:01:53 +0100
Subject: [PATCH 2/2] Link with -pthread
---
configure.ac | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/configure.ac b/configure.ac
index 99451c9..ff1cbaa 100644
--- a/configure.ac
+++ b/configure.ac
@@ -10,7 +10,7 @@ AC_CONFIG_HEADER([config.h])
AM_INIT_AUTOMAKE([subdir-objects no-dependencies])
AC_CONFIG_SRCDIR([src/haveged.c])
AC_CHECK_TYPES([uint32_t, uint8_t])
-HA_LDFLAGS=""
+HA_LDFLAGS="-pthread"
##libtool_start##
LT_INIT
@@ -73,7 +73,6 @@ AC_ARG_ENABLE(threads,
, enable_threads="no")
if test "x$enable_threads" = "xyes"; then
AC_DEFINE(NUMBER_CORES, 4, [Define maxium number of collection threads])
- HA_LDFLAGS="-pthread"
else
AC_DEFINE(NUMBER_CORES, 1, [Define to single collection thread])
fi

30
haveged-switch-root.service
View File

@ -1,30 +0,0 @@
[Unit]
Description=Tell haveged about new root
DefaultDependencies=no
ConditionKernelVersion=<5.6
ConditionPathExists=/etc/initrd-release
Before=initrd-switch-root.service
JoinsNamespaceOf=haveged.service
[Service]
ExecStart=-/usr/sbin/haveged -c root=/sysroot
PrivateNetwork=yes
# added automatically, for details please see
# https://en.opensuse.org/openSUSE:Security_Features#Systemd_hardening_effort
ProtectSystem=full
ProtectHome=true
PrivateDevices=true
ProtectHostname=true
ProtectClock=true
ProtectKernelModules=true
ProtectKernelLogs=true
ProtectControlGroups=true
RestrictRealtime=true
# end of automatic additions
Type=oneshot
StandardInput=null
StandardOutput=null
StandardError=null
[Install]
WantedBy=initrd-switch-root.target

13
haveged.changes
View File

@ -1,3 +1,16 @@
-------------------------------------------------------------------
Fri Oct 27 13:04:10 UTC 2023 - Otto Hollmann <otto.hollmann@suse.com>
- Remove haveged-switch-root.service because it's implemented incorrectly and
neither upstream don't know how to fix it (#77). On the other hand, without
this service haveged will be started from scratch after switch root so it's
hopefully no big deal. Also remove patch for bsc#1203079 as it's considered
as a security threat because of creating fixed name file in world-writable
directory. [jsc#PED-6184, bsc#1206699]
* Remove
- haveged-switch-root.service
- haveged-switch-root.patch
-------------------------------------------------------------------
Fri Dec 2 12:24:35 UTC 2022 - Otto Hollmann <otto.hollmann@suse.com>

12
haveged.spec
View File

@ -1,7 +1,7 @@
#
# spec file for package haveged
#
# Copyright (c) 2022 SUSE LLC
# Copyright (c) 2023 SUSE LLC
#
# All modifications and additions to the file contributed by third parties
# remain the property of their copyright owners, unless otherwise agreed
@ -28,13 +28,10 @@ Source0: https://github.com/jirka-h/haveged/archive/v%{version}.tar.gz#/%
Source2: %{name}.service
Source3: 90-haveged.rules
Source4: haveged-dracut.module
Source5: %{name}-switch-root.service
Patch0: ppc64le.patch
# PATCH-FIX-UPSTREAM: don't write to syslog at startup to avoid deadlocks psimons@suse.com bnc#959237
Patch2: haveged-no-syslog.patch
Patch3: harden_haveged.service.patch
# PATCH-FIX-UPSTREAM: Synchronize haveged instances during switching root bsc#1203079
Patch4: haveged-switch-root.patch
BuildRequires: autoconf
BuildRequires: automake
BuildRequires: libtool
@ -110,8 +107,6 @@ install -Dpm 0644 %{SOURCE2} \
%{buildroot}%{_unitdir}/%{name}.service
install -Dpm 0644 %{SOURCE3} \
%{buildroot}%{_udevrulesdir}/90-%{name}.rules
install -Dpm 0644 %{SOURCE5} \
%{buildroot}%{_unitdir}/%{name}-switch-root.service
install -Dpm 0755 %{SOURCE4} \
%{buildroot}%{_prefix}/lib/dracut/modules.d/98%{name}/module-setup.sh
rm -f %{buildroot}%{_libdir}/libhavege.*a
@ -120,12 +115,10 @@ ln -s %{_sbindir}/service %{buildroot}%{_sbindir}/rc%{name}
%post
%{?udev_rules_update:%udev_rules_update}
%service_add_post %{name}.service
%service_add_post %{name}-switch-root.service
%{?regenerate_initrd_post}
%postun
%service_del_postun %{name}.service
%service_del_postun %{name}-switch-root.service
%{?regenerate_initrd_post}
%posttrans
@ -133,11 +126,9 @@ ln -s %{_sbindir}/service %{buildroot}%{_sbindir}/rc%{name}
%pre
%service_add_pre %{name}.service
%service_add_pre %{name}-switch-root.service
%preun
%service_del_preun %{name}.service
%service_del_preun %{name}-switch-root.service
%post -n libhavege2 -p /sbin/ldconfig
%postun -n libhavege2 -p /sbin/ldconfig
@ -148,7 +139,6 @@ ln -s %{_sbindir}/service %{buildroot}%{_sbindir}/rc%{name}
%{_sbindir}/%{name}
%{_mandir}/man8/%{name}.8%{?ext_man}
%{_unitdir}/%{name}.service
%{_unitdir}/%{name}-switch-root.service
%{_udevrulesdir}/90-%{name}.rules
%dir %{_prefix}/lib/dracut
%dir %{_prefix}/lib/dracut/modules.d