F5 Networks BIG-IP : libssh2 vulnerabilities (K90011301)

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from F5 Networks BIG-IP Solution K90011301.
#
# The text description of this plugin is (C) F5 Networks.
#

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

if (description)
{
  script_id(154888);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/03");

  script_cve_id("CVE-2019-3856", "CVE-2019-3857", "CVE-2019-3863");

  script_name(english:"F5 Networks BIG-IP : libssh2 vulnerabilities (K90011301)");

  script_set_attribute(attribute:"synopsis", value:
"The remote device is missing a vendor-supplied security patch.");
  script_set_attribute(attribute:"description", value:
"The version of F5 Networks BIG-IP installed on the remote host is prior to 16.1.0. It is, therefore, affected by
multiple vulnerabilities as referenced in the K90011301 advisory.

  - An integer overflow flaw, which could lead to an out of bounds write, was discovered in libssh2 before
    1.8.1 in the way keyboard prompt requests are parsed. A remote attacker who compromises a SSH server may
    be able to execute code on the client system when a user connects to the server. (CVE-2019-3856)

  - An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1
    in the way SSH_MSG_CHANNEL_REQUEST packets with an exit signal are parsed. A remote attacker who
    compromises a SSH server may be able to execute code on the client system when a user connects to the
    server. (CVE-2019-3857)

  - A flaw was found in libssh2 before 1.8.1. A server could send a multiple keyboard interactive response
    messages whose total length are greater than unsigned char max characters. This value is used as an index
    to copy memory causing in an out of bounds memory write error. (CVE-2019-3863)

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://my.f5.com/manage/s/article/K90011301");
  script_set_attribute(attribute:"solution", value:
"Upgrade to one of the non-vulnerable versions listed in the F5 Solution K90011301.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/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:R/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-2019-3863");

  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:"2019/03/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/09/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/11/04");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_access_policy_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_advanced_firewall_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_application_acceleration_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_application_security_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_application_visibility_and_reporting");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_domain_name_system");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_global_traffic_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_link_controller");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_local_traffic_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_policy_enforcement_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:f5:big-ip");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"F5 Networks Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2021-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("f5_bigip_detect.nbin");
  script_require_keys("Host/local_checks_enabled", "Host/BIG-IP/hotfix", "Host/BIG-IP/modules", "Host/BIG-IP/version", "Settings/ParanoidReport");

  exit(0);
}


include('f5_func.inc');

if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var version = get_kb_item('Host/BIG-IP/version');
if ( ! version ) audit(AUDIT_OS_NOT, 'F5 Networks BIG-IP');
if ( isnull(get_kb_item('Host/BIG-IP/hotfix')) ) audit(AUDIT_KB_MISSING, 'Host/BIG-IP/hotfix');
if ( ! get_kb_item('Host/BIG-IP/modules') ) audit(AUDIT_KB_MISSING, 'Host/BIG-IP/modules');

if (report_paranoia < 2) audit(AUDIT_PARANOID);

var sol = 'K90011301';
var vmatrix = {
  'AFM': {
    'affected': [
      '16.0.0-16.0.1','15.1.0-15.1.10','14.1.0-14.1.5','13.1.0-13.1.5','12.1.0-12.1.6'
    ],
    'unaffected': [
      '16.1.0'
    ],
  },
  'AM': {
    'affected': [
      '16.0.0-16.0.1','15.1.0-15.1.10','14.1.0-14.1.5','13.1.0-13.1.5','12.1.0-12.1.6'
    ],
    'unaffected': [
      '16.1.0'
    ],
  },
  'APM': {
    'affected': [
      '16.0.0-16.0.1','15.1.0-15.1.10','14.1.0-14.1.5','13.1.0-13.1.5','12.1.0-12.1.6'
    ],
    'unaffected': [
      '16.1.0'
    ],
  },
  'ASM': {
    'affected': [
      '16.0.0-16.0.1','15.1.0-15.1.10','14.1.0-14.1.5','13.1.0-13.1.5','12.1.0-12.1.6'
    ],
    'unaffected': [
      '16.1.0'
    ],
  },
  'AVR': {
    'affected': [
      '16.0.0-16.0.1','15.1.0-15.1.10','14.1.0-14.1.5','13.1.0-13.1.5','12.1.0-12.1.6'
    ],
    'unaffected': [
      '16.1.0'
    ],
  },
  'DNS': {
    'affected': [
      '16.0.0-16.0.1','15.1.0-15.1.10','14.1.0-14.1.5','13.1.0-13.1.5','12.1.0-12.1.6'
    ],
    'unaffected': [
      '16.1.0'
    ],
  },
  'GTM': {
    'affected': [
      '16.0.0-16.0.1','15.1.0-15.1.10','14.1.0-14.1.5','13.1.0-13.1.5','12.1.0-12.1.6'
    ],
    'unaffected': [
      '16.1.0'
    ],
  },
  'LC': {
    'affected': [
      '16.0.0-16.0.1','15.1.0-15.1.10','14.1.0-14.1.5','13.1.0-13.1.5','12.1.0-12.1.6'
    ],
    'unaffected': [
      '16.1.0'
    ],
  },
  'LTM': {
    'affected': [
      '16.0.0-16.0.1','15.1.0-15.1.10','14.1.0-14.1.5','13.1.0-13.1.5','12.1.0-12.1.6'
    ],
    'unaffected': [
      '16.1.0'
    ],
  },
  'PEM': {
    'affected': [
      '16.0.0-16.0.1','15.1.0-15.1.10','14.1.0-14.1.5','13.1.0-13.1.5','12.1.0-12.1.6'
    ],
    'unaffected': [
      '16.1.0'
    ],
  }
};

if (bigip_is_affected(vmatrix:vmatrix, sol:sol))
{
  var extra = NULL;
  if (report_verbosity > 0) extra = bigip_report_get();
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : extra
  );
}
else
{
  var tested = bigip_get_tested_modules();
  var audit_extra = 'For BIG-IP module(s) ' + tested + ',';
  if (tested) audit(AUDIT_INST_VER_NOT_VULN, audit_extra, version);
  else audit(AUDIT_HOST_NOT, 'running any of the affected modules');
}