suexec/7694: when enabled suEXEC, cannot run SSI's 'exec cmd' with argument.

[Masahiro TAKEMURA <ma...@msel.t.u-tokyo.ac.jp>]

>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:
>Unformatted:
 [In order for any reply to be added to the PR database, you need]
 [to include <ap...@Apache.Org> in the Cc line and make sure the]
 [subject line starts with the report component and number, with ]
 [or without any 'Re:' prefixes (such as "general/1098:" or      ]
 ["Re: general/1098:").  If the subject doesn't match this       ]
 [pattern, your message will be misfiled and ignored.  The       ]
 ["apbugs" address is not added to the Cc line of messages from  ]
 [the database automatically because of the potential for mail   ]
 [loops.  If you do not include this Cc, your reply may be ig-   ]
 [nored unless you are responding to an explicit request from a  ]
 [developer.  Reply only with text; DO NOT SEND ATTACHMENTS!     ]