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From Masahiro TAKEMURA <mast...@msel.t.u-tokyo.ac.jp>
Subject suexec/7694: when enabled suEXEC, cannot run SSI's 'exec cmd' with argument.
Date Thu, 10 May 2001 10:29:04 GMT

>Number:         7694
>Category:       suexec
>Synopsis:       when enabled suEXEC, cannot run SSI's 'exec cmd' with argument.
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    apache
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   apache
>Arrival-Date:   Thu May 10 03:30:02 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     mastake@msel.t.u-tokyo.ac.jp
>Release:        1.3.19
>Organization:
apache
>Environment:
FreeBSD 4.3-STABLE at May 3 2001
gcc version 2.95.2 19991024 (release)
>Description:
When enabled suEXEC, cannot run SSI's 'exec cmd' with argument
>How-To-Repeat:
for example:
<!--exec cmd="scriptname arg1"-->
>Fix:
Patch for src/support/suexec.c is later.
but I think this is only Quick Hack.
-----begin
--- suexec.c.orig	Tue Jan 16 02:06:40 2001
+++ suexec.c	Thu May 10 19:08:31 2001
@@ -268,6 +268,9 @@
     struct stat dir_info;	/* directory info holder     */
     struct stat prg_info;	/* program info holder       */
 
+    int idx, su_arg_size = 1;
+    char **su_args;
+
     /*
      * If there are a proper number of arguments, set
      * all of them to variables.  Otherwise, error out.
@@ -279,7 +282,22 @@
     }
     target_uname = argv[1];
     target_gname = argv[2];
-    cmd = argv[3];
+
+    idx = 0;
+    while(argv[3][idx]){
+	if (argv[3][idx] == 0x20) {
+		argv[3][idx] = 0;
+		su_arg_size++;
+	}
+	idx++;
+    }
+    su_args = (char **) malloc(su_arg_size * sizeof(char *));
+    for (idx=0; idx<su_arg_size; idx++){
+	su_args[idx] = argv[3];
+	while(*(argv[3]++) != 0) {};
+    }
+
+    cmd = su_args[0];
 
     /*
      * Check existence/validity of the UID of the user
@@ -575,10 +593,10 @@
     {
 	extern char **environ;
 
-	ap_execve(cmd, &argv[3], environ);
+	ap_execve(cmd, su_args, environ);
     }
 #else /*NEED_HASHBANG_EMUL*/
-    execv(cmd, &argv[3]);
+    execv(cmd, su_args);
 #endif /*NEED_HASHBANG_EMUL*/
 
     /*
-----end
>Release-Note:
>Audit-Trail:
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