From: Eric Covener <covener@apache.org>
Date: Wed, 4 Feb 2015 14:44:23 +0000 (+0000)
Subject:   *) SECURITY: CVE-2015-0228 (cve.mitre.org)
X-Git-Tag: 2.5.0-alpha~3483
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=78eb3b9235515652ed141353d98c239237030410;p=apache

  *) SECURITY: CVE-2015-0228 (cve.mitre.org)
     mod_lua: A maliciously crafted websockets PING after a script
     calls r:wsupgrade() can cause a child process crash.
     [Edward Lu <Chaosed0 gmail.com>]

Discovered by Guido Vranken <guidovranken gmail.com>

Submitted by: Edward Lu
Committed by: covener



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1657261 13f79535-47bb-0310-9956-ffa450edef68
---

diff --git a/CHANGES b/CHANGES
index aa79dac9c6..02141ef5bd 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,6 +1,11 @@
                                                          -*- coding: utf-8 -*-
 Changes with Apache 2.5.0
 
+  *) SECURITY: CVE-2015-0228 (cve.mitre.org)
+     mod_lua: A maliciously crafted websockets PING after a script
+     calls r:wsupgrade() can cause a child process crash. 
+     [Edward Lu <Chaosed0 gmail.com>]
+
   *) mod_lua: After a r:wsupgrade(), mod_lua was not properly
      responding to a websockets PING but instead invoking the specified 
      script. PR57524. [Edward Lu <Chaosed0 gmail.com>]
diff --git a/modules/lua/lua_request.c b/modules/lua/lua_request.c
index dded599a4c..1200c55b35 100644
--- a/modules/lua/lua_request.c
+++ b/modules/lua/lua_request.c
@@ -2227,6 +2227,7 @@ static int lua_websocket_read(lua_State *L)
 {
     apr_socket_t *sock;
     apr_status_t rv;
+    int do_read = 1;
     int n = 0;
     apr_size_t len = 1;
     apr_size_t plen = 0;
@@ -2244,6 +2245,8 @@ static int lua_websocket_read(lua_State *L)
     mask_bytes = apr_pcalloc(r->pool, 4);
     sock = ap_get_conn_socket(r->connection);
 
+    while (do_read) { 
+    do_read = 0;
     /* Get opcode and FIN bit */
     if (plaintext) {
         rv = apr_socket_recv(sock, &byte, &len);
@@ -2377,10 +2380,11 @@ static int lua_websocket_read(lua_State *L)
                 frame[0] = 0x8A;
                 frame[1] = 0;
                 apr_socket_send(sock, frame, &plen); /* Pong! */
-                lua_websocket_read(L); /* read the next frame instead */
+                do_read = 1;
             }
         }
     }
+    }
     return 0;
 }