Debian DLA-2907-1 : apache2 - LTS security update

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dla-2907. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(157321);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/17");

  script_cve_id("CVE-2021-44224", "CVE-2021-44790");
  script_xref(name:"IAVA", value:"2021-A-0604-S");

  script_name(english:"Debian DLA-2907-1 : apache2 - 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 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dla-2907 advisory.

  - A crafted URI sent to httpd configured as a forward proxy (ProxyRequests on) can cause a crash (NULL
    pointer dereference) or, for configurations mixing forward and reverse proxy declarations, can allow for
    requests to be directed to a declared Unix Domain Socket endpoint (Server Side Request Forgery). This
    issue affects Apache HTTP Server 2.4.7 up to 2.4.51 (included). (CVE-2021-44224)

  - A carefully crafted request body can cause a buffer overflow in the mod_lua multipart parser
    (r:parsebody() called from Lua scripts). The Apache httpd team is not aware of an exploit for the
    vulnerability though it might be possible to craft one. This issue affects Apache HTTP Server 2.4.51 and
    earlier. (CVE-2021-44790)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/apache2");
  script_set_attribute(attribute:"see_also", value:"https://www.debian.org/lts/security/2022/dla-2907");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-44224");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-44790");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/stretch/apache2");
  script_set_attribute(attribute:"solution", value:
"Upgrade the apache2 packages.

For Debian 9 stretch, these problems have been fixed in version 2.4.25-3+deb9u12.");
  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:F/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:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-44790");

  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:"2021/12/20");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/02/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/02/02");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:apache2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:apache2-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:apache2-data");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:apache2-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:apache2-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:apache2-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:apache2-ssl-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:apache2-suexec-custom");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:apache2-suexec-pristine");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:apache2-utils");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2022-2023 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('audit.inc');
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:"^(9)\.[0-9]+", string:release)) audit(AUDIT_OS_NOT, 'Debian 9.0', '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': '9.0', 'prefix': 'apache2', 'reference': '2.4.25-3+deb9u12'},
    {'release': '9.0', 'prefix': 'apache2-bin', 'reference': '2.4.25-3+deb9u12'},
    {'release': '9.0', 'prefix': 'apache2-data', 'reference': '2.4.25-3+deb9u12'},
    {'release': '9.0', 'prefix': 'apache2-dbg', 'reference': '2.4.25-3+deb9u12'},
    {'release': '9.0', 'prefix': 'apache2-dev', 'reference': '2.4.25-3+deb9u12'},
    {'release': '9.0', 'prefix': 'apache2-doc', 'reference': '2.4.25-3+deb9u12'},
    {'release': '9.0', 'prefix': 'apache2-ssl-dev', 'reference': '2.4.25-3+deb9u12'},
    {'release': '9.0', 'prefix': 'apache2-suexec-custom', 'reference': '2.4.25-3+deb9u12'},
    {'release': '9.0', 'prefix': 'apache2-suexec-pristine', 'reference': '2.4.25-3+deb9u12'},
    {'release': '9.0', 'prefix': 'apache2-utils', 'reference': '2.4.25-3+deb9u12'}
];

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, 'apache2 / apache2-bin / apache2-data / apache2-dbg / apache2-dev / etc');
}