Debian DLA-3507-1 : pandoc - LTS security update

#%NASL_MIN_LEVEL 80900
#
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dla-3507. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(178788);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/05");

  script_cve_id("CVE-2023-35936", "CVE-2023-38745");
  script_xref(name:"IAVB", value:"2024-B-0030");

  script_name(english:"Debian DLA-3507-1 : pandoc - LTS security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing one or more security-related updates.");
  script_set_attribute(attribute:"description", value:
"The remote Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dla-3507 advisory.

  - Pandoc is a Haskell library for converting from one markup format to another, and a command-line tool that
    uses this library. Starting in version 1.13 and prior to version 3.1.4, Pandoc is susceptible to an
    arbitrary file write vulnerability, which can be triggered by providing a specially crafted image element
    in the input when generating files using the `--extract-media` option or outputting to PDF format. This
    vulnerability allows an attacker to create or overwrite arbitrary files on the system ,depending on the
    privileges of the process running pandoc. It only affects systems that pass untrusted user input to pandoc
    and allow pandoc to be used to produce a PDF or with the `--extract-media` option. The fix is to unescape
    the percent-encoding prior to checking that the resource is not above the working directory, and prior to
    extracting the extension. Some code for checking that the path is below the working directory was flawed
    in a similar way and has also been fixed. Note that the `--sandbox` option, which only affects IO done by
    readers and writers themselves, does not block this vulnerability. The vulnerability is patched in pandoc
    3.1.4. As a workaround, audit the pandoc command and disallow PDF output and the `--extract-media` option.
    (CVE-2023-35936)

  - Pandoc before 3.1.6 allows arbitrary file write: this can be triggered by providing a crafted image
    element in the input when generating files via the --extract-media option or outputting to PDF format.
    This allows an attacker to create or overwrite arbitrary files, depending on the privileges of the process
    running Pandoc. It only affects systems that pass untrusted user input to Pandoc and allow Pandoc to be
    used to produce a PDF or with the --extract-media option. NOTE: this issue exists because of an incomplete
    fix for CVE-2023-35936 (failure to properly account for double encoded path names). (CVE-2023-38745)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1041976");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/pandoc");
  script_set_attribute(attribute:"see_also", value:"https://www.debian.org/lts/security/2023/dla-3507");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2023-35936");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2023-38745");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/buster/pandoc");
  script_set_attribute(attribute:"solution", value:
"Upgrade the pandoc packages.

For Debian 10 buster, these problems have been fixed in version 2.2.1-3+deb10u1.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:H/Au:N/C:N/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2023-38745");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2023/07/05");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/07/25");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/07/25");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libghc-pandoc-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:pandoc-data");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:10.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"II");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Debian Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2023-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}

include('debian_package.inc');

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);

var debian_release = get_kb_item('Host/Debian/release');
if ( isnull(debian_release) ) audit(AUDIT_OS_NOT, 'Debian');
debian_release = chomp(debian_release);
if (! preg(pattern:"^(10)\.[0-9]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 10.0', 'Debian ' + debian_release);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Debian', cpu);

var pkgs = [
    {'release': '10.0', 'prefix': 'libghc-pandoc-dev', 'reference': '2.2.1-3+deb10u1'},
    {'release': '10.0', 'prefix': 'libghc-pandoc-doc', 'reference': '2.2.1-3+deb10u1'},
    {'release': '10.0', 'prefix': 'libghc-pandoc-prof', 'reference': '2.2.1-3+deb10u1'},
    {'release': '10.0', 'prefix': 'pandoc', 'reference': '2.2.1-3+deb10u1'},
    {'release': '10.0', 'prefix': 'pandoc-data', 'reference': '2.2.1-3+deb10u1'}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var _release = NULL;
  var prefix = NULL;
  var reference = NULL;
  if (!empty_or_null(package_array['release'])) _release = package_array['release'];
  if (!empty_or_null(package_array['prefix'])) prefix = package_array['prefix'];
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (_release && prefix && reference) {
    if (deb_check(release:_release, prefix:prefix, reference:reference)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : deb_report_get()
  );
  exit(0);
}
else
{
  var tested = deb_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'libghc-pandoc-dev / libghc-pandoc-doc / libghc-pandoc-prof / pandoc / etc');
}