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. The text
# itself is copyright (C) Red Hat, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(35551);
script_version("1.27");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/14");
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:"RHEL 4 / 5 : ntp (RHSA-2009:0046)");
script_summary(english:"Checks the rpm output for the updated package");
script_set_attribute(
attribute:"synopsis",
value:"The remote Red Hat 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."
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/security/cve/cve-2009-0021"
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/errata/RHSA-2009:0046"
);
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:redhat:enterprise_linux:ntp");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:4");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:4.7");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:5");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:5.3");
script_set_attribute(attribute:"vuln_publication_date", value:"2009/01/07");
script_set_attribute(attribute:"patch_publication_date", value:"2009/01/29");
script_set_attribute(attribute:"plugin_publication_date", value:"2009/01/29");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2009-2021 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 = pregmatch(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 (! preg(pattern:"^(4|5)([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 4.x / 5.x", "Red Hat " + os_ver);
if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "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-2009:0046";
yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
if (!empty_or_null(yum_report))
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
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:"RHEL4", reference:"ntp-4.2.0.a.20040617-8.el4_7.1")) flag++;
if (rpm_check(release:"RHEL5", cpu:"i386", reference:"ntp-4.2.2p1-9.el5_3.1")) flag++;
if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"ntp-4.2.2p1-9.el5_3.1")) flag++;
if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"ntp-4.2.2p1-9.el5_3.1")) flag++;
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
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");
}
}
Vendor | Product | Version | CPE |
---|---|---|---|
redhat | enterprise_linux | ntp | p-cpe:/a:redhat:enterprise_linux:ntp |
redhat | enterprise_linux | 4 | cpe:/o:redhat:enterprise_linux:4 |
redhat | enterprise_linux | 4.7 | cpe:/o:redhat:enterprise_linux:4.7 |
redhat | enterprise_linux | 5 | cpe:/o:redhat:enterprise_linux:5 |
redhat | enterprise_linux | 5.3 | cpe:/o:redhat:enterprise_linux:5.3 |
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
access.redhat.com/errata/RHSA-2009:0046
access.redhat.com/security/cve/cve-2009-0021