apache-suexec_fcgi.patch

diff -urNp httpd-2.4.4.orig/support/suexec.c httpd-2.4.4/support/suexec.c
--- httpd-2.4.4.orig/support/suexec.c	2012-12-03 16:33:42.000000000 +0000
+++ httpd-2.4.4/support/suexec.c	2013-07-11 11:49:54.250178570 +0000
@@ -240,6 +240,21 @@ static void clean_env(void)
     environ = cleanenv;
 }
 
+/*
+ * Return the `basename' of the pathname in STRING (the stuff after
+ * the last '/').  If STRING is `/', just return it. Taken from bash.
+ */
+char *base_pathname(char *string)
+{
+    char *p;
+
+    if (string[0] == '/' && string[1] == 0)
+        return (string);
+
+    p = (char *)strrchr (string, '/');
+        return (p ? ++p : string);
+}
+
 int main(int argc, char *argv[])
 {
     int userdir = 0;        /* ~userdir flag             */
@@ -255,6 +270,7 @@ int main(int argc, char *argv[])
     char dwd[AP_MAXPATH];   /* docroot working directory */
     struct passwd *pw;      /* password entry holder     */
     struct group *gr;       /* group entry holder        */
+    struct passwd tpw;      /* tmp password entry holder */
     struct stat dir_info;   /* directory info holder     */
     struct stat prg_info;   /* program info holder       */
 
@@ -375,8 +391,23 @@ int main(int argc, char *argv[])
     }
     else {
         if ((pw = getpwuid(atoi(target_uname))) == NULL) {
-            log_err("invalid target user id: (%s)\n", target_uname);
-            exit(121);
+            /*
+             * If called as suexec.fcgi ignore if there is no passwd
+             * entry for specified UID. Also bail out if UID = 0.
+             */
+            if(!strcmp(base_pathname(argv[0]),"suexec.fcgi")) {
+                tpw.pw_name = strdup(target_uname);
+                tpw.pw_uid = atoi(target_uname);
+                tpw.pw_dir = (char *)"/tmp";
+                pw = &tpw;
+                if (tpw.pw_uid <= 0) {
+                    log_err("invalid target user id: (%s)\n", target_uname);
+                    exit(121);
+                }
+            } else {
+                log_err("invalid target user id: (%s)\n", target_uname);
+                exit(121);
+            }
         }
     }
 
@@ -555,20 +586,24 @@ int main(int argc, char *argv[])
     }
 
     /*
-     * Error out if the target name/group is different from
-     * the name/group of the cwd or the program.
-     */
-    if ((uid != dir_info.st_uid) ||
-        (gid != dir_info.st_gid) ||
-        (uid != prg_info.st_uid) ||
-        (gid != prg_info.st_gid)) {
-        log_err("target uid/gid (%lu/%lu) mismatch "
-                "with directory (%lu/%lu) or program (%lu/%lu)\n",
-                (unsigned long)uid, (unsigned long)gid,
-                (unsigned long)dir_info.st_uid, (unsigned long)dir_info.st_gid,
-                (unsigned long)prg_info.st_uid, (unsigned long)prg_info.st_gid);
-        exit(120);
+     * If not called as suexec.fcgi error out if the target
+     * name/group is different from the name/group of the cwd
+     * or the program.
+     */
+    if(strcmp(base_pathname(argv[0]),"suexec.fcgi")) {
+        if ((uid != dir_info.st_uid) ||
+            (gid != dir_info.st_gid) ||
+            (uid != prg_info.st_uid) ||
+            (gid != prg_info.st_gid)) {
+            log_err("target uid/gid (%lu/%lu) mismatch "
+                    "with directory (%lu/%lu) or program (%lu/%lu)\n",
+                    (unsigned long)uid, (unsigned long)gid,
+                    (unsigned long)dir_info.st_uid, (unsigned long)dir_info.st_gid,
+                    (unsigned long)prg_info.st_uid, (unsigned long)prg_info.st_gid);
+            exit(120);
+        }
     }
+
     /*
      * Error out if the program is not executable for the user.
      * Otherwise, she won't find any error in the logs except for