From Red Hat Security Advisory 2017:0252 :
An update for ntp is now available for Red Hat Enterprise Linux 6 and Red Hat Enterprise Linux 7.
Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
The Network Time Protocol (NTP) is used to synchronize a computer’s time with another referenced time source. These packages include the ntpd service which continuously adjusts system time and utilities used to query and configure the ntpd service.
Security Fix(es) :
It was found that when ntp is configured with rate limiting for all associations the limits are also applied to responses received from its configured sources. A remote attacker who knows the sources can cause a denial of service by preventing ntpd from accepting valid responses from its sources. (CVE-2016-7426)
A flaw was found in the control mode functionality of ntpd. A remote attacker could send a crafted control mode packet which could lead to information disclosure or result in DDoS amplification attacks.
(CVE-2016-9310)
A flaw was found in the way ntpd implemented the trap service. A remote attacker could send a specially crafted packet to cause a NULL pointer dereference that will crash ntpd, resulting in a denial of service. (CVE-2016-9311)
A flaw was found in the way ntpd running on a host with multiple network interfaces handled certain server responses. A remote attacker could use this flaw which would cause ntpd to not synchronize with the source. (CVE-2016-7429)
A flaw was found in the way ntpd calculated the root delay. A remote attacker could send a specially crafted spoofed packet to cause denial of service or in some special cases even crash. (CVE-2016-7433)
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2017:0252 and
# Oracle Linux Security Advisory ELSA-2017-0252 respectively.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(97036);
script_version("3.6");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/14");
script_cve_id("CVE-2016-7426", "CVE-2016-7429", "CVE-2016-7433", "CVE-2016-9310", "CVE-2016-9311");
script_xref(name:"RHSA", value:"2017:0252");
script_name(english:"Oracle Linux 6 / 7 : ntp (ELSA-2017-0252)");
script_summary(english:"Checks rpm output for the updated packages");
script_set_attribute(
attribute:"synopsis",
value:"The remote Oracle Linux host is missing one or more security updates."
);
script_set_attribute(
attribute:"description",
value:
"From Red Hat Security Advisory 2017:0252 :
An update for ntp is now available for Red Hat Enterprise Linux 6 and
Red Hat Enterprise Linux 7.
Red Hat Product Security has rated this update as having a security
impact of Moderate. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available for each
vulnerability from the CVE link(s) in the References section.
The Network Time Protocol (NTP) is used to synchronize a computer's
time with another referenced time source. These packages include the
ntpd service which continuously adjusts system time and utilities used
to query and configure the ntpd service.
Security Fix(es) :
* It was found that when ntp is configured with rate limiting for all
associations the limits are also applied to responses received from
its configured sources. A remote attacker who knows the sources can
cause a denial of service by preventing ntpd from accepting valid
responses from its sources. (CVE-2016-7426)
* A flaw was found in the control mode functionality of ntpd. A remote
attacker could send a crafted control mode packet which could lead to
information disclosure or result in DDoS amplification attacks.
(CVE-2016-9310)
* A flaw was found in the way ntpd implemented the trap service. A
remote attacker could send a specially crafted packet to cause a NULL
pointer dereference that will crash ntpd, resulting in a denial of
service. (CVE-2016-9311)
* A flaw was found in the way ntpd running on a host with multiple
network interfaces handled certain server responses. A remote attacker
could use this flaw which would cause ntpd to not synchronize with the
source. (CVE-2016-7429)
* A flaw was found in the way ntpd calculated the root delay. A remote
attacker could send a specially crafted spoofed packet to cause denial
of service or in some special cases even crash. (CVE-2016-7433)"
);
script_set_attribute(
attribute:"see_also",
value:"https://oss.oracle.com/pipermail/el-errata/2017-February/006697.html"
);
script_set_attribute(
attribute:"see_also",
value:"https://oss.oracle.com/pipermail/el-errata/2017-February/006698.html"
);
script_set_attribute(attribute:"solution", value:
"Update the affected ntp packages. However, note that updated packages
may not be available from the Oracle repository or its mirrors at this
time.");
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:L/I:N/A:L");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:ntp");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:ntp-doc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:ntp-perl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:ntpdate");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:sntp");
script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:6");
script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:7");
script_set_attribute(attribute:"patch_publication_date", value:"2017/02/06");
script_set_attribute(attribute:"plugin_publication_date", value:"2017/02/07");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2017-2021 Tenable Network Security, Inc.");
script_family(english:"Oracle Linux Local Security Checks");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/OracleLinux", "Host/RedHat/release", "Host/RedHat/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);
if (!get_kb_item("Host/OracleLinux")) audit(AUDIT_OS_NOT, "Oracle Linux");
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || !eregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:release)) audit(AUDIT_OS_NOT, "Oracle Linux");
os_ver = eregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux) .*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Oracle Linux");
os_ver = os_ver[1];
if (! ereg(pattern:"^(6|7)([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Oracle Linux 6 / 7", "Oracle Linux " + os_ver);
if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Oracle Linux", cpu);
flag = 0;
if (rpm_check(release:"EL6", reference:"ntp-4.2.6p5-10.0.1.el6_8.2")) flag++;
if (rpm_check(release:"EL6", reference:"ntp-doc-4.2.6p5-10.0.1.el6_8.2")) flag++;
if (rpm_check(release:"EL6", reference:"ntp-perl-4.2.6p5-10.0.1.el6_8.2")) flag++;
if (rpm_check(release:"EL6", reference:"ntpdate-4.2.6p5-10.0.1.el6_8.2")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"ntp-4.2.6p5-25.0.1.el7_3.1")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"ntp-doc-4.2.6p5-25.0.1.el7_3.1")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"ntp-perl-4.2.6p5-25.0.1.el7_3.1")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"ntpdate-4.2.6p5-25.0.1.el7_3.1")) flag++;
if (rpm_check(release:"EL7", cpu:"x86_64", reference:"sntp-4.2.6p5-25.0.1.el7_3.1")) 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-doc / ntp-perl / ntpdate / sntp");
}
Vendor | Product | Version | CPE |
---|---|---|---|
oracle | linux | ntp | p-cpe:/a:oracle:linux:ntp |
oracle | linux | ntp-doc | p-cpe:/a:oracle:linux:ntp-doc |
oracle | linux | ntp-perl | p-cpe:/a:oracle:linux:ntp-perl |
oracle | linux | ntpdate | p-cpe:/a:oracle:linux:ntpdate |
oracle | linux | sntp | p-cpe:/a:oracle:linux:sntp |
oracle | linux | 6 | cpe:/o:oracle:linux:6 |
oracle | linux | 7 | cpe:/o:oracle:linux:7 |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-7426
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-7429
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-7433
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-9310
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-9311
oss.oracle.com/pipermail/el-errata/2017-February/006697.html
oss.oracle.com/pipermail/el-errata/2017-February/006698.html