F5 Networks BIG-IP : BIG-IP AFM and PEM TMUI XSS vulnerability (K61002104)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from F5 Networks BIG-IP Solution K61002104.
#
# The text description of this plugin is (C) F5 Networks.
#

include('compat.inc');

if (description)
{
  script_id(126404);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/02");

  script_cve_id("CVE-2019-6639");

  script_name(english:"F5 Networks BIG-IP : BIG-IP AFM and PEM TMUI XSS vulnerability (K61002104)");

  script_set_attribute(attribute:"synopsis", value:
"The remote device is missing a vendor-supplied security patch.");
  script_set_attribute(attribute:"description", value:
"Undisclosed TMUI pages for AFM and PEM Subscriber management are
vulnerable to a stored cross-site scripting (XSS) issue. This is a
control plane issue only and is not accessible from the data plane.
The attack requires a malicious resource administrator to store the
XSS. (CVE-2019-6639)

Impact

A malicious, authenticated user with Resource Administrator privileges
may be able to exploit this vulnerability to allow another user with
Administrator privileges to execute system commands. When the BIG-IP
system operates in Appliance mode, the vulnerability still exists;
however, an attacker cannot force arbitrary system commands because
Advanced Shell ( bash ) access is disabled in Appliance mode. Without
Appliance mode, arbitrary command execution is possible when
exploiting this vulnerability. This issue exists only in the control
plane and is not accessible from the data plane. The attack requires a
malicious, authenticated user with Resource Administrator privileges
to store the XSS.");
  script_set_attribute(attribute:"see_also", value:"https://my.f5.com/manage/s/article/K61002104");
  script_set_attribute(attribute:"solution", value:
"Upgrade to one of the non-vulnerable versions listed in the F5 Solution K61002104.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:N/I:P/A:N");
  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:H/UI:R/S:C/C:L/I:L/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-6639");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/07/03");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/07/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/07/02");

  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_advanced_firewall_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) 2019-2023 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 = 'K61002104';
var vmatrix = {
  'AFM': {
    'affected': [
      '14.0.0-14.1.0','13.0.0-13.1.1','12.1.0-12.1.4','11.6.0-11.6.3','11.5.0-11.5.8'
    ],
    'unaffected': [
      '14.1.0.6','14.0.0.5','13.1.1.5','12.1.4.1','11.6.4','11.5.9'
    ],
  },
  'PEM': {
    'affected': [
      '14.0.0-14.1.0','13.0.0-13.1.1','12.1.0-12.1.4','11.6.0-11.6.3','11.5.0-11.5.8'
    ],
    'unaffected': [
      '14.1.0.6','14.0.0.5','13.1.1.5','12.1.4.1','11.6.4','11.5.9'
    ],
  }
};

if (bigip_is_affected(vmatrix:vmatrix, sol:sol))
{
  set_kb_item(name:'www/0/XSS', value:TRUE);
  var extra = NULL;
  if (report_verbosity > 0) extra = bigip_report_get();
  security_report_v4(
      port       : 0,
      severity   : SECURITY_NOTE,
      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');
}