Amazon Linux AMI : tomcat8 (ALAS-2016-679)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2016-679.
#

include("compat.inc");

if (description)
{
  script_id(90272);
  script_version("2.8");
  script_cvs_date("Date: 2018/04/18 15:09:35");

  script_cve_id("CVE-2015-5346", "CVE-2015-5351", "CVE-2016-0706", "CVE-2016-0714", "CVE-2016-0763");
  script_xref(name:"ALAS", value:"2016-679");

  script_name(english:"Amazon Linux AMI : tomcat8 (ALAS-2016-679)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Amazon Linux AMI host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"ResourceLinkFactory.setGlobalContext() is a public method and was
discovered to be accessible by web applications running under a
security manager without any checks. This allowed a malicious web
application to inject a malicious global context that could in turn be
used to disrupt other web applications and/or read and write data
owned by other web applications. (CVE-2016-0763)

A session fixation vulnerability was discovered that might allow
remote attackers to hijack web sessions by leveraging use of a
requestedSessionSSL field for an unintended request when different
session settings are used for deployments of multiple versions of the
same web application. (CVE-2015-5346)

The Manager and Host Manager applications were discovered to establish
sessions and send CSRF tokens for arbitrary new requests, which allows
remote attackers to bypass a CSRF protection mechanism by using a
token. (CVE-2015-5351)

The session-persistence implementation was discovered to mishandle
session attributes, which allows remote authenticated users to bypass
intended SecurityManager restrictions and execute arbitrary code in a
privileged context via a web application that places a crafted object
in a session. (CVE-2016-0714)

It was discovered that
org.apache.catalina.manager.StatusManagerServlet was not placed on the
org/apache/catalina/core/RestrictedServlets.properties list, which
allows remote authenticated users to bypass intended SecurityManager
restrictions and read arbitrary HTTP requests, and consequently
discover session ID values, via a crafted web application.
(CVE-2016-0706)"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://alas.aws.amazon.com/ALAS-2016-679.html"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Run 'yum update tomcat8' to update your system."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");

  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:"patch_publication_date", value:"2016/03/29");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/04/01");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2016-2018 Tenable Network Security, Inc.");
  script_family(english:"Amazon Linux Local Security Checks");

  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:"tomcat8-8.0.32-1.59.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat8-admin-webapps-8.0.32-1.59.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat8-docs-webapp-8.0.32-1.59.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat8-el-3.0-api-8.0.32-1.59.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat8-javadoc-8.0.32-1.59.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat8-jsp-2.3-api-8.0.32-1.59.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat8-lib-8.0.32-1.59.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat8-log4j-8.0.32-1.59.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat8-servlet-3.1-api-8.0.32-1.59.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat8-webapps-8.0.32-1.59.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");
}