debian/patches/01_symlink_vulnerability.diff

   1 From: Julien Viard de Galbert <julien@vdg.blogsite.org>
   2 Date: Tue, 23 Nov 2010 23:29:54 +0100
   3 Subject: Solve a symlink vulnerability
   4
   5 In the same spirit as previous 08_symlink_vulnerability patch for #359745
   6 The .htaccess file creation did not test the symlink.
   7
   8 Index: webalizer/output.c
   9 ===================================================================
  10 --- webalizer.orig/output.c     2010-11-24 14:34:36.000000000 +0100
  11 +++ webalizer/output.c  2010-11-24 14:36:56.000000000 +0100
  12 @@ -2408,6 +2408,21 @@
  13     /* .htaccess file needed? */
  14     if (htaccess)
  15     {
  16 +      struct stat out_stat;
  17 +
  18 +      /* stat the file */
  19 +      if ( !(lstat(".htaccess", &out_stat)) )
  20 +      {
  21 +         /* check if the file a symlink */
  22 +         if ( S_ISLNK(out_stat.st_mode) )
  23 +         {
  24 +            if (verbose)
  25 +           fprintf(stderr,"%s %s (symlink)\n",msg_no_open,".htaccess");
  26 +            return NULL;
  27 +         }
  28 +      }
  29 +
  30 +      /* open the file... */
  31        if ((out_fp=fopen(".htaccess","wx")) != NULL)
  32        {
  33           fprintf(out_fp,"DirectoryIndex %s\n",index_fname);