Ubuntu 14.04 LTS / 16.04 LTS : Apache HTTP Server vulnerabilities (USN-3340-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3340-1. The text 
# itself is copyright (C) Canonical, Inc. See 
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
# trademark of Canonical, Inc.
#

include('compat.inc');

if (description)
{
  script_id(101062);
  script_version("3.15");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/20");

  script_cve_id(
    "CVE-2017-3167",
    "CVE-2017-3169",
    "CVE-2017-7668",
    "CVE-2017-7679"
  );
  script_xref(name:"USN", value:"3340-1");

  script_name(english:"Ubuntu 14.04 LTS / 16.04 LTS : Apache HTTP Server vulnerabilities (USN-3340-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"Emmanuel Dreyfus discovered that third-party modules using the
ap_get_basic_auth_pw() function outside of the authentication phase
may lead to authentication requirements being bypassed. This update
adds a new ap_get_basic_auth_components() function for use by
third-party modules. (CVE-2017-3167)

Vasileios Panopoulos discovered that the Apache mod_ssl module may
crash when third-party modules call ap_hook_process_connection()
during an HTTP request to an HTTPS port. (CVE-2017-3169)

Javier Jimenez discovered that the Apache HTTP Server incorrectly
handled parsing certain requests. A remote attacker could possibly use
this issue to cause the Apache HTTP Server to crash, resulting in a
denial of service. (CVE-2017-7668)

ChenQin and Hanno Bock discovered that the Apache mod_mime module
incorrectly handled certain Content-Type response headers. A remote
attacker could possibly use this issue to cause the Apache HTTP Server
to crash, resulting in a denial of service. (CVE-2017-7679).

Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/notices/USN-3340-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  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:POC/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:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-7679");

  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:"2017/06/20");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/06/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/06/27");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2-data");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2-mpm-event");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2-mpm-itk");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2-mpm-prefork");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2-mpm-worker");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2-suexec");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2-suexec-custom");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2-suexec-pristine");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2-utils");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2.2-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libapache2-mod-macro");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libapache2-mod-proxy-html");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apache2");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2017-2023 Canonical, Inc. / NASL script (C) 2017-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/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);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('14.04' >< os_release || '16.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 14.04 / 16.04', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);

var pkgs = [
    {'osver': '14.04', 'pkgname': 'apache2', 'pkgver': '2.4.7-1ubuntu4.16'},
    {'osver': '14.04', 'pkgname': 'apache2-bin', 'pkgver': '2.4.7-1ubuntu4.16'},
    {'osver': '14.04', 'pkgname': 'apache2-data', 'pkgver': '2.4.7-1ubuntu4.16'},
    {'osver': '14.04', 'pkgname': 'apache2-dev', 'pkgver': '2.4.7-1ubuntu4.16'},
    {'osver': '14.04', 'pkgname': 'apache2-mpm-event', 'pkgver': '2.4.7-1ubuntu4.16'},
    {'osver': '14.04', 'pkgname': 'apache2-mpm-itk', 'pkgver': '2.4.7-1ubuntu4.16'},
    {'osver': '14.04', 'pkgname': 'apache2-mpm-prefork', 'pkgver': '2.4.7-1ubuntu4.16'},
    {'osver': '14.04', 'pkgname': 'apache2-mpm-worker', 'pkgver': '2.4.7-1ubuntu4.16'},
    {'osver': '14.04', 'pkgname': 'apache2-suexec', 'pkgver': '2.4.7-1ubuntu4.16'},
    {'osver': '14.04', 'pkgname': 'apache2-suexec-custom', 'pkgver': '2.4.7-1ubuntu4.16'},
    {'osver': '14.04', 'pkgname': 'apache2-suexec-pristine', 'pkgver': '2.4.7-1ubuntu4.16'},
    {'osver': '14.04', 'pkgname': 'apache2-utils', 'pkgver': '2.4.7-1ubuntu4.16'},
    {'osver': '14.04', 'pkgname': 'apache2.2-bin', 'pkgver': '2.4.7-1ubuntu4.16'},
    {'osver': '14.04', 'pkgname': 'libapache2-mod-macro', 'pkgver': '1:2.4.7-1ubuntu4.16'},
    {'osver': '14.04', 'pkgname': 'libapache2-mod-proxy-html', 'pkgver': '1:2.4.7-1ubuntu4.16'},
    {'osver': '16.04', 'pkgname': 'apache2', 'pkgver': '2.4.18-2ubuntu3.3'},
    {'osver': '16.04', 'pkgname': 'apache2-bin', 'pkgver': '2.4.18-2ubuntu3.3'},
    {'osver': '16.04', 'pkgname': 'apache2-data', 'pkgver': '2.4.18-2ubuntu3.3'},
    {'osver': '16.04', 'pkgname': 'apache2-dev', 'pkgver': '2.4.18-2ubuntu3.3'},
    {'osver': '16.04', 'pkgname': 'apache2-suexec-custom', 'pkgver': '2.4.18-2ubuntu3.3'},
    {'osver': '16.04', 'pkgname': 'apache2-suexec-pristine', 'pkgver': '2.4.18-2ubuntu3.3'},
    {'osver': '16.04', 'pkgname': 'apache2-utils', 'pkgver': '2.4.18-2ubuntu3.3'}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var osver = NULL;
  var pkgname = NULL;
  var pkgver = NULL;
  if (!empty_or_null(package_array['osver'])) osver = package_array['osver'];
  if (!empty_or_null(package_array['pkgname'])) pkgname = package_array['pkgname'];
  if (!empty_or_null(package_array['pkgver'])) pkgver = package_array['pkgver'];
  if (osver && pkgname && pkgver) {
    if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'apache2 / apache2-bin / apache2-data / apache2-dev / etc');
}