chm2pdf Insecure Temporary File Creation or DoS Vulnerability

# SPDX-FileCopyrightText: 2008 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("1.3.6.1.4.1.25623.1.0.800316");
  script_version("2023-07-28T05:05:23+0000");
  script_tag(name:"last_modification", value:"2023-07-28 05:05:23 +0000 (Fri, 28 Jul 2023)");
  script_tag(name:"creation_date", value:"2008-12-12 16:11:26 +0100 (Fri, 12 Dec 2008)");
  script_tag(name:"cvss_base", value:"6.9");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:M/Au:N/C:C/I:C/A:C");
  script_cve_id("CVE-2008-5298", "CVE-2008-5299");
  script_name("chm2pdf Insecure Temporary File Creation or DoS Vulnerability");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2008 Greenbone AG");
  script_family("Denial of Service");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/debian_linux"); # Only Debian is affected

  script_xref(name:"URL", value:"http://secunia.com/advisories/32257/");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/31735");
  script_xref(name:"URL", value:"http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=501959");
  script_xref(name:"URL", value:"http://www.openwall.com/lists/oss-security/2008/12/01/5");
  script_xref(name:"URL", value:"http://bugs.debian.org/cgi-bin/bugreport.cgi?msg=20;filename=chm2pdf_nmu.diff;att=1;bug=501959");

  script_tag(name:"impact", value:"Successful exploitation will allow local users to delete arbitrary files
  via symlink attack or corrupt sensitive files, which may also result in a denial of service.");

  script_tag(name:"affected", value:"chm2pdf version prior to 0.9.1 on Debian");

  script_tag(name:"insight", value:"The vulnerability is due to following,

  - error in .chm file in /tmp/chm2pdf/orig and /tmp/chm2pdf/work temporary
    directories.

  - uses temporary files in directories with fixed names.");

  script_tag(name:"summary", value:"chm2pdf is prone to Insecure Temporary File Creation or Denial of Service Vulnerability.");

  script_tag(name:"solution", value:"Upgrade to a later higher version or apply the patche from
  the referenced link.");

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

  exit(0);
}

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

sock = ssh_login_or_reuse_connection();
if(!sock)
  exit(0);

binPaths = ssh_find_file(file_name:"/chm2pdf$", useregex:TRUE, sock:sock);
if(!binPaths){
  ssh_close_connection();
  exit(0);
}

foreach c2pBin(binPaths){

  c2pBin = chomp(c2pBin);
  if(!c2pBin) continue;

  c2pVer = ssh_get_bin_version(full_prog_name:c2pBin, version_argv:"--version", ver_pattern:"version ([0-9.]+)", sock:sock);
  if(c2pVer[1]){
    if(version_is_less(version:c2pVer[1], test_version:"0.9.1")){
      report = report_fixed_ver(installed_version:c2pVer[1], fixed_version:"0.9.1", install_path:c2pBin);
      security_message(port:0, data:report);
      ssh_close_connection();
      exit(0);
    }
  }
}

ssh_close_connection();
exit(0);