Amazon Linux 2 : tomcat (ALASTOMCAT8.5-2023-010)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux 2 Security Advisory ALASTOMCAT8.5-2023-010.
##

include('compat.inc');

if (description)
{
  script_id(182062);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/09/28");

  script_cve_id("CVE-2020-17527", "CVE-2021-24122");
  script_xref(name:"IAVA", value:"2020-A-0570-S");
  script_xref(name:"CEA-ID", value:"CEA-2021-0025");

  script_name(english:"Amazon Linux 2 : tomcat (ALASTOMCAT8.5-2023-010)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Amazon Linux 2 host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The version of tomcat installed on the remote host is prior to 8.5.60-1. It is, therefore, affected by multiple
vulnerabilities as referenced in the ALAS2TOMCAT8.5-2023-010 advisory.

  - While investigating bug 64830 it was discovered that Apache Tomcat 10.0.0-M1 to 10.0.0-M9, 9.0.0-M1 to
    9.0.39 and 8.5.0 to 8.5.59 could re-use an HTTP request header value from the previous stream received on
    an HTTP/2 connection for the request associated with the subsequent stream. While this would most likely
    lead to an error and the closure of the HTTP/2 connection, it is possible that information could leak
    between requests. (CVE-2020-17527)

  - When serving resources from a network location using the NTFS file system, Apache Tomcat versions
    10.0.0-M1 to 10.0.0-M9, 9.0.0.M1 to 9.0.39, 8.5.0 to 8.5.59 and 7.0.0 to 7.0.106 were susceptible to JSP
    source code disclosure in some configurations. The root cause was the unexpected behaviour of the JRE API
    File.getCanonicalPath() which in turn was caused by the inconsistent behaviour of the Windows API
    (FindFirstFileW) in some circumstances. (CVE-2021-24122)

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://alas.aws.amazon.com/AL2/ALASTOMCAT8.5-2023-010.html");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2020-17527.html");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2021-24122.html");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/faqs.html");
  script_set_attribute(attribute:"solution", value:
"Run 'yum update tomcat' to update your system.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:F/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:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-17527");

  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:"2020/11/17");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/08/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/09/27");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:tomcat");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:tomcat-admin-webapps");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:tomcat-docs-webapp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:tomcat-el-3.0-api");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:tomcat-javadoc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:tomcat-jsp-2.3-api");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:tomcat-jsvc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:tomcat-lib");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:tomcat-servlet-3.1-api");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:tomcat-webapps");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux:2");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Amazon Linux 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/AmazonLinux/release", "Host/AmazonLinux/rpm-list");

  exit(0);
}

include("rpm.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);

var alas_release = get_kb_item("Host/AmazonLinux/release");
if (isnull(alas_release) || !strlen(alas_release)) audit(AUDIT_OS_NOT, "Amazon Linux");
var os_ver = pregmatch(pattern: "^AL(A|\d+|-\d+)", string:alas_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Amazon Linux");
os_ver = os_ver[1];
if (os_ver != "2")
{
  if (os_ver == 'A') os_ver = 'AMI';
  audit(AUDIT_OS_NOT, "Amazon Linux 2", "Amazon Linux " + os_ver);
}

if (!get_kb_item("Host/AmazonLinux/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

var pkgs = [
    {'reference':'tomcat-8.5.60-1.amzn2', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'tomcat8.5'},
    {'reference':'tomcat-admin-webapps-8.5.60-1.amzn2', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'tomcat8.5'},
    {'reference':'tomcat-docs-webapp-8.5.60-1.amzn2', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'tomcat8.5'},
    {'reference':'tomcat-el-3.0-api-8.5.60-1.amzn2', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'tomcat8.5'},
    {'reference':'tomcat-javadoc-8.5.60-1.amzn2', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'tomcat8.5'},
    {'reference':'tomcat-jsp-2.3-api-8.5.60-1.amzn2', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'tomcat8.5'},
    {'reference':'tomcat-jsvc-8.5.60-1.amzn2', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'tomcat8.5'},
    {'reference':'tomcat-lib-8.5.60-1.amzn2', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'tomcat8.5'},
    {'reference':'tomcat-servlet-3.1-api-8.5.60-1.amzn2', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'tomcat8.5'},
    {'reference':'tomcat-webapps-8.5.60-1.amzn2', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'tomcat8.5'}
];

var flag = 0;
foreach var package_array ( pkgs ) {
  var reference = NULL;
  var _release = NULL;
  var sp = NULL;
  var _cpu = NULL;
  var el_string = NULL;
  var rpm_spec_vers_cmp = NULL;
  var epoch = NULL;
  var allowmaj = NULL;
  var exists_check = NULL;
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (!empty_or_null(package_array['release'])) _release = package_array['release'];
  if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
  if (!empty_or_null(package_array['cpu'])) _cpu = package_array['cpu'];
  if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];
  if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
  if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
  if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
  if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
  if (reference && _release && (!exists_check || rpm_exists(release:_release, rpm:exists_check))) {
    if (rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) flag++;
  }
}

if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "tomcat / tomcat-admin-webapps / tomcat-docs-webapp / etc");
}