Amazon Linux AMI : tomcat7 / tomcat8 (ALAS-2017-903)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2017-903.
#

include("compat.inc");

if (description)
{
  script_id(103600);
  script_version("3.3");
  script_cvs_date("Date: 2018/04/18 15:09:36");

  script_cve_id("CVE-2017-7674");
  script_xref(name:"ALAS", value:"2017-903");

  script_name(english:"Amazon Linux AMI : tomcat7 / tomcat8 (ALAS-2017-903)");
  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:
"1480618 :

Vary header not added by CORS filter leading to cache poisoning

The CORS Filter in Apache Tomcat did not add an HTTP Vary header
indicating that the response varies depending on Origin. This
permitted client and server side cache poisoning in some
circumstances. (CVE-2017-7674)"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://alas.aws.amazon.com/ALAS-2017-903.html"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Run 'yum update tomcat7' to update your system.

Run 'yum update tomcat8' to update your system."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:tomcat7");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:tomcat7-admin-webapps");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:tomcat7-docs-webapp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:tomcat7-el-2.2-api");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:tomcat7-javadoc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:tomcat7-jsp-2.2-api");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:tomcat7-lib");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:tomcat7-log4j");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:tomcat7-servlet-3.0-api");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:tomcat7-webapps");
  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:"2017/10/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/10/03");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2018 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:"tomcat7-7.0.81-1.29.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat7-admin-webapps-7.0.81-1.29.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat7-docs-webapp-7.0.81-1.29.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat7-el-2.2-api-7.0.81-1.29.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat7-javadoc-7.0.81-1.29.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat7-jsp-2.2-api-7.0.81-1.29.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat7-lib-7.0.81-1.29.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat7-log4j-7.0.81-1.29.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat7-servlet-3.0-api-7.0.81-1.29.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat7-webapps-7.0.81-1.29.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat8-8.0.46-1.76.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat8-admin-webapps-8.0.46-1.76.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat8-docs-webapp-8.0.46-1.76.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat8-el-3.0-api-8.0.46-1.76.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat8-javadoc-8.0.46-1.76.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat8-jsp-2.3-api-8.0.46-1.76.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat8-lib-8.0.46-1.76.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat8-log4j-8.0.46-1.76.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat8-servlet-3.1-api-8.0.46-1.76.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"tomcat8-webapps-8.0.46-1.76.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, "tomcat7 / tomcat7-admin-webapps / tomcat7-docs-webapp / etc");
}