CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:N/I:P/A:P
EPSS
Percentile
81.0%
Updated ntp packages to correct a security issue are now available for Red Hat Enterprise Linux 4 and 5.
This update has been rated as having moderate security impact by the Red Hat Security Response Team.
The Network Time Protocol (NTP) is used to synchronize a computerβs time with a referenced time source.
A flaw was discovered in the way the ntpd daemon checked the return value of the OpenSSL EVP_VerifyFinal function. On systems using NTPv4 authentication, this could lead to an incorrect verification of cryptographic signatures, allowing time-spoofing attacks.
(CVE-2009-0021)
Note: This issue only affects systems that have enabled NTP authentication. By default, NTP authentication is not enabled.
All ntp users are advised to upgrade to the updated packages, which contain a backported patch to resolve this issue. 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-2009:0046 and
# CentOS Errata and Security Advisory 2009:0046 respectively.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(43728);
script_version("1.17");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/04");
script_cve_id("CVE-2008-5077", "CVE-2009-0021", "CVE-2009-0046", "CVE-2009-0047", "CVE-2009-0048", "CVE-2009-0049", "CVE-2009-0124", "CVE-2009-0125", "CVE-2009-0127", "CVE-2009-0128", "CVE-2009-0130");
script_bugtraq_id(33150);
script_xref(name:"RHSA", value:"2009:0046");
script_name(english:"CentOS 4 / 5 : ntp (CESA-2009:0046)");
script_summary(english:"Checks rpm output for the updated package");
script_set_attribute(
attribute:"synopsis",
value:"The remote CentOS host is missing a security update."
);
script_set_attribute(
attribute:"description",
value:
"Updated ntp packages to correct a security issue are now available for
Red Hat Enterprise Linux 4 and 5.
This update has been rated as having moderate security impact by the
Red Hat Security Response Team.
The Network Time Protocol (NTP) is used to synchronize a computer's
time with a referenced time source.
A flaw was discovered in the way the ntpd daemon checked the return
value of the OpenSSL EVP_VerifyFinal function. On systems using NTPv4
authentication, this could lead to an incorrect verification of
cryptographic signatures, allowing time-spoofing attacks.
(CVE-2009-0021)
Note: This issue only affects systems that have enabled NTP
authentication. By default, NTP authentication is not enabled.
All ntp users are advised to upgrade to the updated packages, which
contain a backported patch to resolve this issue. After installing the
update, the ntpd daemon will restart automatically."
);
# https://lists.centos.org/pipermail/centos-announce/2009-April/015754.html
script_set_attribute(
attribute:"see_also",
value:"http://www.nessus.org/u?5d264402"
);
# https://lists.centos.org/pipermail/centos-announce/2009-April/015755.html
script_set_attribute(
attribute:"see_also",
value:"http://www.nessus.org/u?4be1d234"
);
# https://lists.centos.org/pipermail/centos-announce/2009-February/015603.html
script_set_attribute(
attribute:"see_also",
value:"http://www.nessus.org/u?6dcd8c7c"
);
script_set_attribute(attribute:"solution", value:"Update the affected ntp package.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/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_cwe_id(20, 287);
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:ntp");
script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:4");
script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:5");
script_set_attribute(attribute:"vuln_publication_date", value:"2009/01/07");
script_set_attribute(attribute:"patch_publication_date", value:"2009/04/09");
script_set_attribute(attribute:"plugin_publication_date", value:"2010/01/06");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2010-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_family(english:"CentOS Local Security Checks");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/CentOS/release", "Host/CentOS/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/CentOS/release");
if (isnull(release) || "CentOS" >!< release) audit(AUDIT_OS_NOT, "CentOS");
os_ver = pregmatch(pattern: "CentOS(?: Linux)? release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "CentOS");
os_ver = os_ver[1];
if (! preg(pattern:"^(4|5)([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "CentOS 4.x / 5.x", "CentOS " + os_ver);
if (!get_kb_item("Host/CentOS/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && "ia64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "CentOS", cpu);
flag = 0;
if (rpm_check(release:"CentOS-4", cpu:"ia64", reference:"ntp-4.2.0.a.20040617-8.el4_7.1")) flag++;
if (rpm_check(release:"CentOS-5", reference:"ntp-4.2.2p1-9.el5.centos.1")) flag++;
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
extra : rpm_report_get()
);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "ntp");
}
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5077
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0021
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0046
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0047
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0048
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0049
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0124
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0125
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0127
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0128
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0130
www.nessus.org/u?4be1d234
www.nessus.org/u?5d264402
www.nessus.org/u?6dcd8c7c