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Index: scheduler/client.c
===================================================================
--- ./scheduler/client.c (revision 12054)
+++ ./scheduler/client.c (working copy)
@@ -3310,7 +3310,7 @@
* then fallback to the default one...
*/
- if ((status = stat(filename, filestats)) != 0 && language[0] &&
+ if ((status = lstat(filename, filestats)) != 0 && language[0] &&
strncmp(con->uri, "/icons/", 7) &&
strncmp(con->uri, "/ppd/", 5) &&
strncmp(con->uri, "/rss/", 5) &&
@@ -3408,13 +3408,13 @@
plen = len - (ptr - filename);
strlcpy(ptr, "index.html", plen);
- status = stat(filename, filestats);
+ status = lstat(filename, filestats);
#ifdef HAVE_JAVA
if (status)
{
strlcpy(ptr, "index.class", plen);
- status = stat(filename, filestats);
+ status = lstat(filename, filestats);
}
#endif /* HAVE_JAVA */
@@ -3422,7 +3422,7 @@
if (status)
{
strlcpy(ptr, "index.pl", plen);
- status = stat(filename, filestats);
+ status = lstat(filename, filestats);
}
#endif /* HAVE_PERL */
@@ -3430,7 +3430,7 @@
if (status)
{
strlcpy(ptr, "index.php", plen);
- status = stat(filename, filestats);
+ status = lstat(filename, filestats);
}
#endif /* HAVE_PHP */
@@ -3438,18 +3438,39 @@
if (status)
{
strlcpy(ptr, "index.pyc", plen);
- status = stat(filename, filestats);
+ status = lstat(filename, filestats);
}
if (status)
{
strlcpy(ptr, "index.py", plen);
- status = stat(filename, filestats);
+ status = lstat(filename, filestats);
}
#endif /* HAVE_PYTHON */
}
while (status && language[0]);
+
+ /*
+ * If we've found a symlink, 404 the sucker to avoid disclosing information.
+ */
+
+ if (!status && S_ISLNK(filestats->st_mode))
+ {
+ cupsdLogMessage(CUPSD_LOG_INFO, "[Client %d] Symlinks such as \"%s\" are not allowed.", con->http.fd, filename);
+ return (NULL);
+ }
+
+ /*
+ * Similarly, if the file/directory does not have world read permissions, do
+ * not allow access...
+ */
+
+ if (!status && !(filestats->st_mode & S_IROTH))
+ {
+ cupsdLogMessage(CUPSD_LOG_INFO, "[Client %d] Files/directories such as \"%s\" must be world-readable.", con->http.fd, filename);
+ return (NULL);
+ }
}
cupsdLogMessage(CUPSD_LOG_DEBUG2,
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