addons/knowledge/security/ir.model.access.csv

   1 id,name,model_id:id,group_id:id,perm_read,perm_write,perm_create,perm_unlink\r
   2 access_ir_attachment_sale_manager,ir_attachment manager,base.model_ir_attachment,base.group_sale_manager,1,1,1,1\r
   3 access_ir_attachment_partner_manager,ir_attachment_partner manager,base.model_ir_attachment,base.group_partner_manager,1,1,1,1\r