CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS
Percentile
99.6%
Updated ntp packages that fix several security issues are now available for Red Hat Enterprise Linux 5.
Red Hat Product Security has rated this update as having Important security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.
The Network Time Protocol (NTP) is used to synchronize a computer’s time with a referenced time source.
Multiple buffer overflow flaws were discovered in ntpd’s crypto_recv(), ctl_putdata(), and configure() functions. A remote attacker could use either of these flaws to send a specially crafted request packet that could crash ntpd or, potentially, execute arbitrary code with the privileges of the ntp user. Note: the crypto_recv() flaw requires non-default configurations to be active, while the ctl_putdata() flaw, by default, can only be exploited via local attackers, and the configure() flaw requires additional authentication to exploit. (CVE-2014-9295)
It was found that ntpd automatically generated weak keys for its internal use if no ntpdc request authentication key was specified in the ntp.conf configuration file. A remote attacker able to match the configured IP restrictions could guess the generated key, and possibly use it to send ntpdc query or configuration requests. (CVE-2014-9293)
It was found that ntp-keygen used a weak method for generating MD5 keys. This could possibly allow an attacker to guess generated MD5 keys that could then be used to spoof an NTP client or server. Note:
it is recommended to regenerate any MD5 keys that had explicitly been generated with ntp-keygen; the default installation does not contain such keys). (CVE-2014-9294)
All ntp users are advised to upgrade to this updated package, which contains backported patches to resolve these issues. After installing the update, the ntpd daemon will restart automatically.
#%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-2014:2025. The text
# itself is copyright (C) Red Hat, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(80161);
script_version("1.19");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/14");
script_cve_id("CVE-2014-9293", "CVE-2014-9294", "CVE-2014-9295");
script_xref(name:"RHSA", value:"2014:2025");
script_name(english:"RHEL 5 : ntp (RHSA-2014:2025)");
script_summary(english:"Checks the rpm output for the updated packages");
script_set_attribute(
attribute:"synopsis",
value:"The remote Red Hat host is missing one or more security updates."
);
script_set_attribute(
attribute:"description",
value:
"Updated ntp packages that fix several security issues are now
available for Red Hat Enterprise Linux 5.
Red Hat Product Security has rated this update as having Important
security impact. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available from the
CVE link in the References section.
The Network Time Protocol (NTP) is used to synchronize a computer's
time with a referenced time source.
Multiple buffer overflow flaws were discovered in ntpd's
crypto_recv(), ctl_putdata(), and configure() functions. A remote
attacker could use either of these flaws to send a specially crafted
request packet that could crash ntpd or, potentially, execute
arbitrary code with the privileges of the ntp user. Note: the
crypto_recv() flaw requires non-default configurations to be active,
while the ctl_putdata() flaw, by default, can only be exploited via
local attackers, and the configure() flaw requires additional
authentication to exploit. (CVE-2014-9295)
It was found that ntpd automatically generated weak keys for its
internal use if no ntpdc request authentication key was specified in
the ntp.conf configuration file. A remote attacker able to match the
configured IP restrictions could guess the generated key, and possibly
use it to send ntpdc query or configuration requests. (CVE-2014-9293)
It was found that ntp-keygen used a weak method for generating MD5
keys. This could possibly allow an attacker to guess generated MD5
keys that could then be used to spoof an NTP client or server. Note:
it is recommended to regenerate any MD5 keys that had explicitly been
generated with ntp-keygen; the default installation does not contain
such keys). (CVE-2014-9294)
All ntp users are advised to upgrade to this updated package, which
contains backported patches to resolve these issues. After installing
the update, the ntpd daemon will restart automatically."
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/errata/RHSA-2014:2025"
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/security/cve/cve-2014-9294"
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/security/cve/cve-2014-9295"
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/security/cve/cve-2014-9293"
);
script_set_attribute(
attribute:"solution",
value:"Update the affected ntp and / or ntp-debuginfo packages."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ntp");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ntp-debuginfo");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:5");
script_set_attribute(attribute:"patch_publication_date", value:"2014/12/20");
script_set_attribute(attribute:"plugin_publication_date", value:"2014/12/22");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2014-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_family(english:"Red Hat Local Security Checks");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/cpu");
exit(0);
}
include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("rpm.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || "Red Hat" >!< release) audit(AUDIT_OS_NOT, "Red Hat");
os_ver = eregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Red Hat");
os_ver = os_ver[1];
if (! ereg(pattern:"^5([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 5.x", "Red Hat " + os_ver);
if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "s390" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Red Hat", cpu);
yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo))
{
rhsa = "RHSA-2014:2025";
yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
if (!empty_or_null(yum_report))
{
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : yum_report
);
exit(0);
}
else
{
audit_message = "affected by Red Hat security advisory " + rhsa;
audit(AUDIT_OS_NOT, audit_message);
}
}
else
{
flag = 0;
if (rpm_check(release:"RHEL5", cpu:"i386", reference:"ntp-4.2.2p1-18.el5_11")) flag++;
if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"ntp-4.2.2p1-18.el5_11")) flag++;
if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"ntp-4.2.2p1-18.el5_11")) flag++;
if (rpm_check(release:"RHEL5", cpu:"i386", reference:"ntp-debuginfo-4.2.2p1-18.el5_11")) flag++;
if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"ntp-debuginfo-4.2.2p1-18.el5_11")) flag++;
if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"ntp-debuginfo-4.2.2p1-18.el5_11")) flag++;
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : rpm_report_get() + redhat_report_package_caveat()
);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "ntp / ntp-debuginfo");
}
}
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-9293
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-9294
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-9295
access.redhat.com/errata/RHSA-2014:2025
access.redhat.com/security/cve/cve-2014-9293
access.redhat.com/security/cve/cve-2014-9294
access.redhat.com/security/cve/cve-2014-9295