GLSA-202310-16 : Ubiquiti UniFi: remote code execution via bundled log4j

#%NASL_MIN_LEVEL 80900
#
# (C) Tenable, Inc.
#
# @NOAGENT@
#
# The descriptive text and package checks in this plugin were
# extracted from Gentoo Linux Security Advisory GLSA 202310-16.
#
# The advisory text is Copyright (C) 2001-2021 Gentoo Foundation, Inc.
# and licensed under the Creative Commons - Attribution / Share Alike
# license. See http://creativecommons.org/licenses/by-sa/3.0/
#

include('compat.inc');

if (description)
{
  script_id(183901);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/26");

  script_cve_id("CVE-2021-4104", "CVE-2021-45046");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2023/05/22");

  script_name(english:"GLSA-202310-16 : Ubiquiti UniFi: remote code execution via bundled log4j");

  script_set_attribute(attribute:"synopsis", value:
"");
  script_set_attribute(attribute:"description", value:
"The remote host is affected by the vulnerability described in GLSA-202310-16 (Ubiquiti UniFi: remote code execution via
bundled log4j)

  - JMSAppender in Log4j 1.2 is vulnerable to deserialization of untrusted data when the attacker has write
    access to the Log4j configuration. The attacker can provide TopicBindingName and
    TopicConnectionFactoryBindingName configurations causing JMSAppender to perform JNDI requests that result
    in remote code execution in a similar fashion to CVE-2021-44228. Note this issue only affects Log4j 1.2
    when specifically configured to use JMSAppender, which is not the default. Apache Log4j 1.2 reached end of
    life in August 2015. Users should upgrade to Log4j 2 as it addresses numerous other issues from the
    previous versions. (CVE-2021-4104)

  - It was found that the fix to address CVE-2021-44228 in Apache Log4j 2.15.0 was incomplete in certain non-
    default configurations. This could allows attackers with control over Thread Context Map (MDC) input data
    when the logging configuration uses a non-default Pattern Layout with either a Context Lookup (for
    example, $${ctx:loginId}) or a Thread Context Map pattern (%X, %mdc, or %MDC) to craft malicious input
    data using a JNDI Lookup pattern resulting in an information leak and remote code execution in some
    environments and local code execution in all environments. Log4j 2.16.0 (Java 8) and 2.12.2 (Java 7) fix
    this issue by removing support for message lookup patterns and disabling JNDI functionality by default.
    (CVE-2021-45046)

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://security.gentoo.org/glsa/202310-16");
  script_set_attribute(attribute:"see_also", value:"https://bugs.gentoo.org/show_bug.cgi?id=828853");
  script_set_attribute(attribute:"solution", value:
"All Ubiquity UniFi users should upgrade to the latest version:

          # emerge --sync
          # emerge --ask --oneshot --verbose >=net-wireless/unifi-6.5.55");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/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:H/PR:N/UI:N/S:C/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-2021-4104");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2021-45046");

  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:"2021/12/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/10/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/10/26");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:unifi");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 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/Gentoo/release", "Host/Gentoo/qpkg-list");

  exit(0);
}
include('qpkg.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item('Host/Gentoo/release')) audit(AUDIT_OS_NOT, 'Gentoo');
if (!get_kb_item('Host/Gentoo/qpkg-list')) audit(AUDIT_PACKAGE_LIST_MISSING);

var flag = 0;

var packages = [
  {
    'name' : 'net-wireless/unifi',
    'unaffected' : make_list("ge 6.5.55"),
    'vulnerable' : make_list("lt 6.5.55")
  }
];

foreach var package( packages ) {
  if (isnull(package['unaffected'])) package['unaffected'] = make_list();
  if (isnull(package['vulnerable'])) package['vulnerable'] = make_list();
  if (qpkg_check(package: package['name'] , unaffected: package['unaffected'], vulnerable: package['vulnerable'])) flag++;
}


if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : qpkg_report_get()
  );
  exit(0);
}
else
{
  qpkg_tests = list_uniq(qpkg_tests);
  var tested = qpkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'Ubiquiti UniFi');
}