Debian DSA-5020-1 : apache-log4j2 - security update

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dsa-5020. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

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

if (description)
{
  script_id(156015);
  script_version("1.11");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/02/17");

  script_cve_id("CVE-2020-9488", "CVE-2021-44228");
  script_xref(name:"IAVA", value:"2020-A-0196-S");
  script_xref(name:"IAVA", value:"2020-A-0324");
  script_xref(name:"IAVA", value:"2021-A-0035-S");
  script_xref(name:"IAVA", value:"2021-A-0573");
  script_xref(name:"IAVA", value:"0001-A-0650");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2021/12/24");
  script_xref(name:"CEA-ID", value:"CEA-2021-0004");
  script_xref(name:"CEA-ID", value:"CEA-2021-0025");
  script_xref(name:"CEA-ID", value:"CEA-2021-0052");
  script_xref(name:"CEA-ID", value:"CEA-2023-0004");

  script_name(english:"Debian DSA-5020-1 : apache-log4j2 - security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing one or more security-related updates.");
  script_set_attribute(attribute:"description", value:
"The remote Debian 10 / 11 host has a package installed that is affected by multiple vulnerabilities as referenced in the
dsa-5020 advisory.

  - Improper validation of certificate with host mismatch in Apache Log4j SMTP appender. This could allow an
    SMTPS connection to be intercepted by a man-in-the-middle attack which could leak any log messages sent
    through that appender. (CVE-2020-9488)

  - Apache Log4j2 <=2.14.1 JNDI features used in configuration, log messages, and parameters do not protect
    against attacker controlled LDAP and other JNDI related endpoints. An attacker who can control log
    messages or log message parameters can execute arbitrary code loaded from LDAP servers when message lookup
    substitution is enabled. From log4j 2.15.0, this behavior has been disabled by default. In previous
    releases (>2.10) this behavior can be mitigated by setting system property log4j2.formatMsgNoLookups to
    true or by removing the JndiLookup class from the classpath (example: zip -q -d log4j-core-*.jar
    org/apache/logging/log4j/core/lookup/JndiLookup.class). Java 8u121 (see
    https://www.oracle.com/java/technologies/javase/8u121-relnotes.html) protects against remote code
    execution by defaulting com.sun.jndi.rmi.object.trustURLCodebase and
    com.sun.jndi.cosnaming.object.trustURLCodebase to false. (CVE-2021-44228)

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://bugs.debian.org/cgi-bin/bugreport.cgi?bug=959450");
  # https://security-tracker.debian.org/tracker/source-package/apache-log4j2
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a7f9f2b8");
  script_set_attribute(attribute:"see_also", value:"https://www.debian.org/security/2021/dsa-5020");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2020-9488");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-44228");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/buster/apache-log4j2");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bullseye/apache-log4j2");
  script_set_attribute(attribute:"solution", value:
"Upgrade the apache-log4j2 packages.

For the stable distribution (bullseye), this problem has been fixed in version 2.15.0-1~deb11u1.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-44228");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploit_framework_core", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");
  script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
  script_set_attribute(attribute:"canvas_package", value:"CANVAS");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/04/27");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/12/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/12/12");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:liblog4j2-java");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:10.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:11.0");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2021-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/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:"^(10)\.[0-9]+|^(11)\.[0-9]+", string:release)) audit(AUDIT_OS_NOT, 'Debian 10.0 / 11.0', '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': '10.0', 'prefix': 'liblog4j2-java', 'reference': '2.15.0-1~deb10u1'},
    {'release': '11.0', 'prefix': 'liblog4j2-java', 'reference': '2.15.0-1~deb11u1'}
];

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_HOLE,
    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, 'liblog4j2-java');
}