The following security-related issues were resolved :
CVE-2016-7426 : Client rate limiting and server responses
CVE-2016-7429 : Attack on interface selection
CVE-2016-7433 : Broken initial sync calculations regression
CVE-2016-9310 : Mode 6 unauthenticated trap information disclosure and DDoS vector
CVE-2016-9311 : NULL pointer dereference when trap service is enabled
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2017-781.
#
include("compat.inc");
if (description)
{
script_id(96283);
script_version("3.11");
script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/22");
script_cve_id("CVE-2016-7426", "CVE-2016-7429", "CVE-2016-7433", "CVE-2016-9310", "CVE-2016-9311");
script_xref(name:"ALAS", value:"2017-781");
script_name(english:"Amazon Linux AMI : ntp (ALAS-2017-781)");
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:
"The following security-related issues were resolved :
CVE-2016-7426 : Client rate limiting and server responses
CVE-2016-7429 : Attack on interface selection
CVE-2016-7433 : Broken initial sync calculations regression
CVE-2016-9310 : Mode 6 unauthenticated trap information disclosure and
DDoS vector
CVE-2016-9311 : NULL pointer dereference when trap service is enabled"
);
script_set_attribute(
attribute:"see_also",
value:"https://alas.aws.amazon.com/ALAS-2017-781.html"
);
script_set_attribute(
attribute:"solution",
value:"Run 'yum update ntp' to update your system."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A: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_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ntp");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ntp-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ntp-doc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ntp-perl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:ntpdate");
script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux");
script_set_attribute(attribute:"vuln_publication_date", value:"2017/01/13");
script_set_attribute(attribute:"patch_publication_date", value:"2017/01/04");
script_set_attribute(attribute:"plugin_publication_date", value:"2017/01/05");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
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:"ntp-4.2.6p5-43.33.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"ntp-debuginfo-4.2.6p5-43.33.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"ntp-doc-4.2.6p5-43.33.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"ntp-perl-4.2.6p5-43.33.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"ntpdate-4.2.6p5-43.33.amzn1")) flag++;
if (flag)
{
if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
else security_hole(0);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "ntp / ntp-debuginfo / ntp-doc / ntp-perl / ntpdate");
}