PuTTY Multiple Integer Overflow Vulnerabilities - Windows

# SPDX-FileCopyrightText: 2013 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

CPE = "cpe:/a:putty:putty";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.803871");
  script_version("2024-02-15T05:05:40+0000");
  script_tag(name:"last_modification", value:"2024-02-15 05:05:40 +0000 (Thu, 15 Feb 2024)");
  script_tag(name:"creation_date", value:"2013-08-21 11:16:36 +0530 (Wed, 21 Aug 2013)");
  script_tag(name:"cvss_base", value:"6.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:P/I:P/A:P");

  script_cve_id("CVE-2013-4206", "CVE-2013-4207", "CVE-2013-4208", "CVE-2013-4852");

  script_tag(name:"qod_type", value:"registry");

  script_tag(name:"solution_type", value:"VendorFix");

  script_name("PuTTY Multiple Integer Overflow Vulnerabilities - Windows");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2013 Greenbone AG");
  script_family("General");
  script_dependencies("gb_putty_portable_detect.nasl");
  script_mandatory_keys("putty/detected");

  script_tag(name:"summary", value:"PuTTY is prone to multiple integer overflow vulnerabilities.");

  script_tag(name:"insight", value:"Multiple Integer overflow errors due to:

  - Improper processing of public-key signatures.

  - Improper validation of DSA signatures in the 'modmul()' function
  (putty/sshbn.c)

  - Not removing sensitive data stored in the memory after it is no longer
  needed.

  - Input is not properly validated when handling negative SSH handshake
  message lengths in the getstring() function in sshrsa.c and sshdss.c.");

  script_tag(name:"impact", value:"Successful exploitation will allow attackers to cause
  heap-based buffer overflows, resulting in a denial of service or potentially allowing
  the execution of arbitrary code.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");

  script_tag(name:"affected", value:"PuTTY version before 0.63 on Windows");

  script_tag(name:"solution", value:"Update to version 0.63 or later.");

  script_xref(name:"URL", value:"http://secunia.com/advisories/54354");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/61599");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/61644");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/61645");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/61649");
  script_xref(name:"URL", value:"http://seclists.org/oss-sec/2013/q3/289");
  script_xref(name:"URL", value:"http://seclists.org/oss-sec/2013/q3/291");
  script_xref(name:"URL", value:"http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-modmul.html");
  script_xref(name:"URL", value:"http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html");

  exit(0);
}

include( "host_details.inc" );
include( "version_func.inc" );

if( ! infos = get_app_version_and_location( cpe:CPE, exit_no_version:TRUE ) )
  exit( 0 );

version = infos["version"];
location = infos["location"];

if( version_is_less( version:version, test_version:"0.63" ) ) {
  report = report_fixed_ver( installed_version:version, fixed_version:"0.63", install_path:location );
  security_message( data:report, port:0 );
  exit( 0 );
}

exit( 99 );