lib/parse_ini.c: Drop privileges for reading file

Read the configuration file with privileges temporarily dropped if the
code is used by a setuid plugin.

1 files changed, 10 insertions, 0 deletions

diff --git a/lib/parse_ini.c b/lib/parse_ini.c
index 447bd45..86b94e7 100644
--- a/lib/parse_ini.c
+++ b/lib/parse_ini.c
@@ -22,6 +22,7 @@
 *****************************************************************************/
 
 #include "common.h"
+#include "idpriv.h"
 #include "utils_base.h"
 #include "parse_ini.h"
 
@@ -118,6 +119,11 @@ np_get_defaults(const char *locator, const char *default_section)
         FILE *inifile = NULL;
         np_arg_list *defaults = NULL;
         np_ini_info i;
+        int is_suid_plugin = mp_suid();
+
+        if (is_suid_plugin && idpriv_temp_drop() == -1)
+                die(STATE_UNKNOWN, _("Cannot drop privileges: %s\n"),
+                    strerror(errno));
 
         parse_locator(locator, default_section, &i);
         inifile = strcmp(i.file, "-") == 0 ? stdin : fopen(i.file, "r");
@@ -133,6 +139,10 @@ np_get_defaults(const char *locator, const char *default_section)
         if (inifile != stdin)
                 fclose(inifile);
         free(i.stanza);
+        if (is_suid_plugin && idpriv_temp_restore() == -1)
+                die(STATE_UNKNOWN, _("Cannot restore privileges: %s\n"),
+                    strerror(errno));
+
         return defaults;
 }