Debian DLA-3149-1 : ruby-nokogiri - 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-3149. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(166069);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/10/12");

  script_cve_id("CVE-2019-5477", "CVE-2020-26247", "CVE-2022-24836");

  script_name(english:"Debian DLA-3149-1 : ruby-nokogiri - 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 a package installed that is affected by multiple vulnerabilities as referenced in the
dla-3149 advisory.

  - A command injection vulnerability in Nokogiri v1.10.3 and earlier allows commands to be executed in a
    subprocess via Ruby's `Kernel.open` method. Processes are vulnerable only if the undocumented method
    `Nokogiri::CSS::Tokenizer#load_file` is being called with unsafe user input as the filename. This
    vulnerability appears in code generated by the Rexical gem versions v1.0.6 and earlier. Rexical is used by
    Nokogiri to generate lexical scanner code for parsing CSS queries. The underlying vulnerability was
    addressed in Rexical v1.0.7 and Nokogiri upgraded to this version of Rexical in Nokogiri v1.10.4.
    (CVE-2019-5477)

  - Nokogiri is a Rubygem providing HTML, XML, SAX, and Reader parsers with XPath and CSS selector support. In
    Nokogiri before version 1.11.0.rc4 there is an XXE vulnerability. XML Schemas parsed by
    Nokogiri::XML::Schema are trusted by default, allowing external resources to be accessed over the network,
    potentially enabling XXE or SSRF attacks. This behavior is counter to the security policy followed by
    Nokogiri maintainers, which is to treat all input as untrusted by default whenever possible. This is fixed
    in Nokogiri version 1.11.0.rc4. (CVE-2020-26247)

  - Nokogiri is an open source XML and HTML library for Ruby. Nokogiri `< v1.13.4` contains an inefficient
    regular expression that is susceptible to excessive backtracking when attempting to detect encoding in
    HTML documents. Users are advised to upgrade to Nokogiri `>= 1.13.4`. There are no known workarounds for
    this issue. (CVE-2022-24836)

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=934802");
  # https://security-tracker.debian.org/tracker/source-package/ruby-nokogiri
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a4325c6e");
  script_set_attribute(attribute:"see_also", value:"https://www.debian.org/lts/security/2022/dla-3149");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2019-5477");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2020-26247");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2022-24836");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/buster/ruby-nokogiri");
  script_set_attribute(attribute:"solution", value:
"Upgrade the ruby-nokogiri packages.

For Debian 10 buster, these problems have been fixed in version 1.10.0+dfsg1-2+deb10u1.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-5477");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/08/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/10/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/10/12");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ruby-nokogiri");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:10.0");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2022 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 release = get_kb_item('Host/Debian/release');
if ( isnull(release) ) audit(AUDIT_OS_NOT, 'Debian');
var release = chomp(release);
if (! preg(pattern:"^(10)\.[0-9]+", string:release)) audit(AUDIT_OS_NOT, 'Debian 10.0', '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': 'ruby-nokogiri', 'reference': '1.10.0+dfsg1-2+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_HOLE,
    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, 'ruby-nokogiri');
}