Patches #9143 and #9144 (Mantis #1723)

Changes the permissions module to make scripts permissive only when intended
Adds security checks to asset transfers to prevent hacked clients fron
requesting script sources.
Adds security checks to llClientView to verify all aspects of ownership
and permissions for inventory based script retrieval.

OpenSim/Framework/Communications/Cache/AssetCache.cs

@@ -445,7 +445,10 @@ namespace OpenSim.Framework.Communications.Cache
                         req.NumPackets = CalculateNumPackets(assetInf.Data);
 
                         RequestedAssets.Remove(assetInf.FullID);
-                        AssetRequests.Add(req);
+                        // If it's a direct request for a script, drop it
+                        // because it's a hacked client
+                        if(req.AssetRequestSource != 2 || assetInf.Type != 10)
+                            AssetRequests.Add(req);
                     }
                 }
             }
@@ -609,6 +612,10 @@ namespace OpenSim.Framework.Communications.Cache
                 return;
             }
 
+            // Scripts cannot be retrieved by direct request
+            if (transferRequest.TransferInfo.SourceType == 2 && asset.Type == 10)
+                return;
+
             // The asset is knosn to exist and is in our cache, so add it to the AssetRequests list
             AssetRequest req = new AssetRequest();
             req.RequestUser = userInfo;

OpenSim/Region/ClientStack/LindenUDP/LLClientView.cs

@@ -5110,6 +5110,65 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                     case PacketType.TransferRequest:
                         //Console.WriteLine("ClientView.ProcessPackets.cs:ProcessInPacket() - Got transfer request");
                         TransferRequestPacket transfer = (TransferRequestPacket)Pack;
+                        // Validate inventory transfers
+                        // Has to be done here, because AssetCache can't do it
+                        //
+                        if (transfer.TransferInfo.SourceType == 3)
+                        {
+                            LLUUID taskID = null;
+                            LLUUID itemID = null;
+                            LLUUID requestID = null;
+                            taskID = new LLUUID(transfer.TransferInfo.Params, 48);
+                            itemID = new LLUUID(transfer.TransferInfo.Params, 64);
+                            requestID = new LLUUID(transfer.TransferInfo.Params, 80);
+                            if (!(((Scene)m_scene).ExternalChecks.ExternalChecksBypassPermissions()))
+                            {
+                                if(taskID != LLUUID.Zero) // Prim
+                                {
+                                    SceneObjectPart part = ((Scene)m_scene).GetSceneObjectPart(taskID);
+                                    if(part == null)
+                                        break;
+
+                                    if(part.OwnerID != AgentId)
+                                        break;
+
+                                    if((part.OwnerMask & (uint)PermissionMask.Modify) == 0)
+                                        break;
+
+                                    TaskInventoryItem ti = part.GetInventoryItem(itemID);
+                                    if(ti == null)
+                                        break;
+
+                                    if(ti.OwnerID != AgentId)
+                                        break;
+
+                                    if((ti.OwnerMask & ((uint)PermissionMask.Modify| (uint)PermissionMask.Copy | (uint)PermissionMask.Transfer)) != ((uint)PermissionMask.Modify| (uint)PermissionMask.Copy | (uint)PermissionMask.Transfer))
+                                        break;
+
+                                    if(ti.AssetID != requestID)
+                                        break;
+                                }
+                                else // Agent
+                                {
+                                    CachedUserInfo userInfo = ((Scene)m_scene).CommsManager.UserProfileCacheService.GetUserDetails(AgentId);
+                                    if(userInfo == null)
+                                        break;
+
+                                    if(userInfo.RootFolder == null)
+                                        break;
+
+                                    InventoryItemBase assetRequestItem = userInfo.RootFolder.FindItem(itemID);
+                                    if(assetRequestItem == null)
+                                        return;
+
+                                    if((assetRequestItem.CurrentPermissions & ((uint)PermissionMask.Modify| (uint)PermissionMask.Copy | (uint)PermissionMask.Transfer)) != ((uint)PermissionMask.Modify| (uint)PermissionMask.Copy | (uint)PermissionMask.Transfer))
+                                        break;
+                                    if(assetRequestItem.AssetID != requestID)
+                                        break;
+                                }
+                            }
+                        }
+
                         m_assetCache.AddAssetRequest(this, transfer);
                         /* RequestAsset = OnRequestAsset;
                          if (RequestAsset != null)

OpenSim/Region/Environment/Modules/World/Permissions/PermissionsModule.cs

@@ -602,7 +602,7 @@ namespace OpenSim.Region.Environment.Modules.World.Permissions
                 DebugPermissionInformation(MethodInfo.GetCurrentMethod().Name);
                 if (m_bypassPermissions) return m_bypassPermissionsValue;
 
-                return true;
+                return false;
             }
 
             private bool CanEditNotecard(LLUUID notecard, LLUUID objectID, LLUUID user, Scene scene)