Irssi Off-by-one Read/Write DoS Vulnerability (Linux)

###############################################################################
# OpenVAS Vulnerability Test
# $Id: gb_irssi_dos_vul_lin.nasl 4869 2016-12-29 11:01:45Z teissa $
#
# Irssi Off-by-one Read/Write DoS Vulnerability (Linux)
#
# Authors:
# Antu Sanadi <[email protected]>
#
# Copyright:
# Copyright (c) 2009 Greenbone Networks GmbH, http://www.greenbone.net
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2
# (or any later version), as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
###############################################################################

tag_solution = "No solution or patch was made available for at least one year
since disclosure of this vulnerability. Likely none will be provided anymore.
General solution options are to upgrade to a newer release, disable respective
features, remove the product or replace the product by another one.";

tag_impact = "Successful exploitation will allow attackers to cause memory
corruption, and can crash an affected application by tricking a user into
connecting to a malicious IRC server.

Impact Level: Application";

tag_affected = "Irssi version 0.8.13 and prior on Linux";

tag_insight = "Off-by-one error in the 'event_wallops' function in
fe-common/irc/fe-events.c when processing empty commands sent by IRC servers,
which triggers a one-byte buffer under-read and a one-byte buffer underflow.";

tag_summary = "This host has installed Irssi and is prone to Denial of Service
Vulnerability";

if(description)
{
  script_id(800634);
  script_version("$Revision: 4869 $");
  script_tag(name:"last_modification", value:"$Date: 2016-12-29 12:01:45 +0100 (Thu, 29 Dec 2016) $");
  script_tag(name:"creation_date", value:"2009-06-19 09:45:44 +0200 (Fri, 19 Jun 2009)");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_cve_id("CVE-2009-1959");
  script_bugtraq_id(35399);
  script_name("Irssi Off-by-one Read/Write DoS Vulnerability (Linux)");


  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2009 Greenbone Networks GmbH");
  script_family("Denial of Service");
  script_dependencies("gb_irssi_detect_lin.nasl");
  script_require_keys("Irssi/Lin/Ver");
  script_tag(name : "impact" , value : tag_impact);
  script_tag(name : "affected" , value : tag_affected);
  script_tag(name : "insight" , value : tag_insight);
  script_tag(name : "summary" , value : tag_summary);
  script_tag(name : "solution" , value : tag_solution);
  script_tag(name:"solution_type", value:"WillNotFix");
  script_tag(name:"qod_type", value:"executable_version");
  script_xref(name : "URL" , value : "http://www.vupen.com/english/advisories/2009/1596");
  script_xref(name : "URL" , value : "http://bugs.irssi.org/index.php?do=details&task_id=662");
  script_xref(name : "URL" , value : "http://www.securitytracker.com/alerts/2009/Jun/1022410.html");
  exit(0);
}


include("version_func.inc");

irssiVer = get_kb_item("Irssi/Lin/Ver");

# Check Irssi version 0.8.13 and prior
if(irssiVer != NULL)
{
  if(version_is_less_equal(version:irssiVer, test_version:"0.8.13")){
    security_message(0);
  }
}