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nessusThis script is Copyright (C) 2020-2024 and is owned by Tenable, Inc. or an Affiliate thereof.ALA_ALAS-2020-1409.NASL
HistoryJul 30, 2020 - 12:00 a.m.

Amazon Linux AMI : tomcat8 (ALAS-2020-1409)

2020-07-3000:00:00
This script is Copyright (C) 2020-2024 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
10

7.8 High

AI Score

Confidence

High

The payload length in a WebSocket frame was not correctly validated in Apache Tomcat 10.0.0-M1 to 10.0.0-M6, 9.0.0.M1 to 9.0.36, 8.5.0 to 8.5.56 and 7.0.27 to 7.0.104. Invalid payload lengths could trigger an infinite loop. Multiple requests with invalid payload lengths could lead to a denial of service. (CVE-2020-13935)

An h2c direct connection to Apache Tomcat 10.0.0-M1 to 10.0.0-M6, 9.0.0.M5 to 9.0.36 and 8.5.1 to 8.5.56 did not release the HTTP/1.1 processor after the upgrade to HTTP/2. If a sufficient number of such requests were made, an OutOfMemoryException could occur leading to a denial of service. (CVE-2020-13934)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2020-1409.
#

include('compat.inc');

if (description)
{
  script_id(139089);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/02/27");

  script_cve_id("CVE-2020-13934", "CVE-2020-13935");
  script_xref(name:"ALAS", value:"2020-1409");
  script_xref(name:"CEA-ID", value:"CEA-2021-0004");

  script_name(english:"Amazon Linux AMI : tomcat8 (ALAS-2020-1409)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Amazon Linux AMI host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The payload length in a WebSocket frame was not correctly validated in
Apache Tomcat 10.0.0-M1 to 10.0.0-M6, 9.0.0.M1 to 9.0.36, 8.5.0 to
8.5.56 and 7.0.27 to 7.0.104. Invalid payload lengths could trigger an
infinite loop. Multiple requests with invalid payload lengths could
lead to a denial of service. (CVE-2020-13935)

An h2c direct connection to Apache Tomcat 10.0.0-M1 to 10.0.0-M6,
9.0.0.M5 to 9.0.36 and 8.5.1 to 8.5.56 did not release the HTTP/1.1
processor after the upgrade to HTTP/2. If a sufficient number of such
requests were made, an OutOfMemoryException could occur leading to a
denial of service. (CVE-2020-13934)");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/ALAS-2020-1409.html");
  script_set_attribute(attribute:"solution", value:
"Run 'yum update tomcat8' to update your system.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/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:N/S:U/C:N/I:N/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-2020-13935");

  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:"2020/07/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/07/29");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/07/30");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:tomcat8");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:tomcat8-admin-webapps");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:tomcat8-docs-webapp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:tomcat8-el-3.0-api");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:tomcat8-javadoc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:tomcat8-jsp-2.3-api");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:tomcat8-lib");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:tomcat8-log4j");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:tomcat8-servlet-3.1-api");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:tomcat8-webapps");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2020-2024 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("audit.inc");
include("global_settings.inc");
include("rpm.inc");


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

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

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


flag = 0;
if (rpm_check(release:"ALA", reference:"tomcat8-8.5.57-1.85.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat8-admin-webapps-8.5.57-1.85.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat8-docs-webapp-8.5.57-1.85.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat8-el-3.0-api-8.5.57-1.85.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat8-javadoc-8.5.57-1.85.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat8-jsp-2.3-api-8.5.57-1.85.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat8-lib-8.5.57-1.85.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat8-log4j-8.5.57-1.85.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat8-servlet-3.1-api-8.5.57-1.85.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat8-webapps-8.5.57-1.85.amzn1")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "tomcat8 / tomcat8-admin-webapps / tomcat8-docs-webapp / etc");
}

7.8 High

AI Score

Confidence

High

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