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nessusThis script is Copyright (C) 2022 and is owned by Tenable, Inc. or an Affiliate thereof.DEBIAN_DLA-2909.NASL
HistoryFeb 04, 2022 - 12:00 a.m.

Debian DLA-2909-1 : strongswan - LTS security update

2022-02-0400:00:00
This script is Copyright (C) 2022 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
13

9.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

5.8 Medium

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:P/I:N/A:P

0.002 Low

EPSS

Percentile

53.4%

The remote Debian 9 host has packages installed that are affected by a vulnerability as referenced in the dla-2909 advisory.

  • In strongSwan before 5.9.5, a malicious responder can send an EAP-Success message too early without actually authenticating the client and (in the case of EAP methods with mutual authentication and EAP-only authentication for IKEv2) even without server authentication. (CVE-2021-45079)

Note that Nessus has not tested for this issue but has instead relied only on the applicationā€™s self-reported version number.

#%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-2909. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

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

if (description)
{
  script_id(157379);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/02/08");

  script_cve_id("CVE-2021-45079");

  script_name(english:"Debian DLA-2909-1 : strongswan - LTS security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing a security-related update.");
  script_set_attribute(attribute:"description", value:
"The remote Debian 9 host has packages installed that are affected by a vulnerability as referenced in the dla-2909
advisory.

  - In strongSwan before 5.9.5, a malicious responder can send an EAP-Success message too early without
    actually authenticating the client and (in the case of EAP methods with mutual authentication and EAP-only
    authentication for IKEv2) even without server authentication. (CVE-2021-45079)

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/strongswan");
  script_set_attribute(attribute:"see_also", value:"https://www.debian.org/lts/security/2022/dla-2909");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-45079");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/stretch/strongswan");
  script_set_attribute(attribute:"solution", value:
"Upgrade the strongswan packages.

For Debian 9 stretch, this problem has been fixed in version 5.5.1-4+deb9u6.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:N/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:N/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-2021-45079");

  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:"2022/01/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/02/04");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/02/04");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:charon-cmd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:charon-systemd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libcharon-extra-plugins");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libstrongswan");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libstrongswan-extra-plugins");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libstrongswan-standard-plugins");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:strongswan");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:strongswan-charon");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:strongswan-ike");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:strongswan-ikev1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:strongswan-ikev2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:strongswan-libcharon");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:strongswan-nm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:strongswan-pki");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:strongswan-scepclient");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:strongswan-starter");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:strongswan-swanctl");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");
  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('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': 'charon-cmd', 'reference': '5.5.1-4+deb9u6'},
    {'release': '9.0', 'prefix': 'charon-systemd', 'reference': '5.5.1-4+deb9u6'},
    {'release': '9.0', 'prefix': 'libcharon-extra-plugins', 'reference': '5.5.1-4+deb9u6'},
    {'release': '9.0', 'prefix': 'libstrongswan', 'reference': '5.5.1-4+deb9u6'},
    {'release': '9.0', 'prefix': 'libstrongswan-extra-plugins', 'reference': '5.5.1-4+deb9u6'},
    {'release': '9.0', 'prefix': 'libstrongswan-standard-plugins', 'reference': '5.5.1-4+deb9u6'},
    {'release': '9.0', 'prefix': 'strongswan', 'reference': '5.5.1-4+deb9u6'},
    {'release': '9.0', 'prefix': 'strongswan-charon', 'reference': '5.5.1-4+deb9u6'},
    {'release': '9.0', 'prefix': 'strongswan-ike', 'reference': '5.5.1-4+deb9u6'},
    {'release': '9.0', 'prefix': 'strongswan-ikev1', 'reference': '5.5.1-4+deb9u6'},
    {'release': '9.0', 'prefix': 'strongswan-ikev2', 'reference': '5.5.1-4+deb9u6'},
    {'release': '9.0', 'prefix': 'strongswan-libcharon', 'reference': '5.5.1-4+deb9u6'},
    {'release': '9.0', 'prefix': 'strongswan-nm', 'reference': '5.5.1-4+deb9u6'},
    {'release': '9.0', 'prefix': 'strongswan-pki', 'reference': '5.5.1-4+deb9u6'},
    {'release': '9.0', 'prefix': 'strongswan-scepclient', 'reference': '5.5.1-4+deb9u6'},
    {'release': '9.0', 'prefix': 'strongswan-starter', 'reference': '5.5.1-4+deb9u6'},
    {'release': '9.0', 'prefix': 'strongswan-swanctl', 'reference': '5.5.1-4+deb9u6'}
];

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, 'charon-cmd / charon-systemd / libcharon-extra-plugins / libstrongswan / etc');
}
VendorProductVersionCPE
debiandebian_linuxcharon-cmdp-cpe:/a:debian:debian_linux:charon-cmd
debiandebian_linuxcharon-systemdp-cpe:/a:debian:debian_linux:charon-systemd
debiandebian_linuxlibcharon-extra-pluginsp-cpe:/a:debian:debian_linux:libcharon-extra-plugins
debiandebian_linuxlibstrongswanp-cpe:/a:debian:debian_linux:libstrongswan
debiandebian_linuxlibstrongswan-extra-pluginsp-cpe:/a:debian:debian_linux:libstrongswan-extra-plugins
debiandebian_linuxlibstrongswan-standard-pluginsp-cpe:/a:debian:debian_linux:libstrongswan-standard-plugins
debiandebian_linuxstrongswanp-cpe:/a:debian:debian_linux:strongswan
debiandebian_linuxstrongswan-charonp-cpe:/a:debian:debian_linux:strongswan-charon
debiandebian_linuxstrongswan-ikep-cpe:/a:debian:debian_linux:strongswan-ike
debiandebian_linuxstrongswan-ikev1p-cpe:/a:debian:debian_linux:strongswan-ikev1
Rows per page:
1-10 of 181

9.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

5.8 Medium

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:P/I:N/A:P

0.002 Low

EPSS

Percentile

53.4%