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shared: in code that might get called from suid programs use __secure_getenv() rather than getenv()

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It's better to be safe than sorry.
This commit is contained in:
Lennart Poettering 2012-08-23 18:47:01 +02:00
parent fe1fed02c7
commit 88fae6e044
5 changed files with 19 additions and 19 deletions
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4
TODO
View File

@ -65,8 +65,6 @@ Features:
* maybe make systemd-detect-virt suid? or use fscaps?
* consider using __secure_getenv() instead of getenv() in libs
* man: document in ExecStart= explicitly that we don't take shell command lines, only executable names with arguments
* shutdown: don't read-only mount anything when running in container
@ -505,6 +503,8 @@ Regularly:
* set_put(), hashmap_put() return values check. i.e. == 0 doesn't free()!
* use __secure_getenv() instead of getenv() where appropriate
Scheduled for removal (or fixing):
* xxxOverridable dependencies

6
src/core/dbus.c
View File

@ -955,12 +955,12 @@ static DBusConnection* manager_bus_connect_private(Manager *m, DBusBusType type)
switch (type) {
case DBUS_BUS_SYSTEM:
address = getenv("DBUS_SYSTEM_BUS_ADDRESS");
address = __secure_getenv("DBUS_SYSTEM_BUS_ADDRESS");
if (!address || !address[0])
address = DBUS_SYSTEM_BUS_DEFAULT_ADDRESS;
break;
case DBUS_BUS_SESSION:
address = getenv("DBUS_SESSION_BUS_ADDRESS");
address = __secure_getenv("DBUS_SESSION_BUS_ADDRESS");
if (!address || !address[0])
address = DBUS_SESSION_BUS_DEFAULT_ADDRESS;
break;
@ -1077,7 +1077,7 @@ static int bus_init_private(Manager *m) {
const char *e;
char *p;
e = getenv("XDG_RUNTIME_DIR");
e = __secure_getenv("XDG_RUNTIME_DIR");
if (!e)
return 0;

2
src/libudev/libudev.c
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@ -191,7 +191,7 @@ _public_ struct udev *udev_new(void)
}
/* environment overrides config */
env = getenv("UDEV_LOG");
env = __secure_getenv("UDEV_LOG");
if (env != NULL)
udev_set_log_priority(udev, util_log_priority(env));

2
src/shared/dbus-common.c
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@ -121,7 +121,7 @@ int bus_connect(DBusBusType t, DBusConnection **_bus, bool *_private, DBusError
* try via XDG_RUNTIME_DIR first, then
* fallback to normal bus access */
e = getenv("XDG_RUNTIME_DIR");
e = __secure_getenv("XDG_RUNTIME_DIR");
if (e) {
char *p;

24
src/shared/log.c
View File

@ -688,21 +688,21 @@ int log_set_max_level_from_string(const char *e) {
void log_parse_environment(void) {
const char *e;
if ((e = getenv("SYSTEMD_LOG_TARGET")))
if (log_set_target_from_string(e) < 0)
log_warning("Failed to parse log target %s. Ignoring.", e);
e = __secure_getenv("SYSTEMD_LOG_TARGET");
if (e && log_set_target_from_string(e) < 0)
log_warning("Failed to parse log target %s. Ignoring.", e);
if ((e = getenv("SYSTEMD_LOG_LEVEL")))
if (log_set_max_level_from_string(e) < 0)
log_warning("Failed to parse log level %s. Ignoring.", e);
e = __secure_getenv("SYSTEMD_LOG_LEVEL");
if (e && log_set_max_level_from_string(e) < 0)
log_warning("Failed to parse log level %s. Ignoring.", e);
if ((e = getenv("SYSTEMD_LOG_COLOR")))
if (log_show_color_from_string(e) < 0)
log_warning("Failed to parse bool %s. Ignoring.", e);
e = __secure_getenv("SYSTEMD_LOG_COLOR");
if (e && log_show_color_from_string(e) < 0)
log_warning("Failed to parse bool %s. Ignoring.", e);
if ((e = getenv("SYSTEMD_LOG_LOCATION")))
if (log_show_location_from_string(e) < 0)
log_warning("Failed to parse bool %s. Ignoring.", e);
e = __secure_getenv("SYSTEMD_LOG_LOCATION");
if (e && log_show_location_from_string(e) < 0)
log_warning("Failed to parse bool %s. Ignoring.", e);
}
LogTarget log_get_target(void) {