The version of NTP installed on the remote AIX host is affected by the following vulnerabilities :
A time serving flaw exists in the trusted key system due to improper key checks. An authenticated, remote attacker can exploit this to perform impersonation attacks between authenticated peers. (CVE-2015-7974)
An information disclosure vulnerability exists in the message authentication functionality in libntp that is triggered during the handling of a series of specially crafted messages. An adjacent attacker can exploit this to partially recover the message digest key.
(CVE-2016-1550)
A flaw exists due to improper filtering of IPv4 ‘bogon’ packets received from a network. An unauthenticated, remote attacker can exploit this to spoof packets to appear to come from a specific reference clock.
(CVE-2016-1551)
A denial of service vulnerability exists that allows an authenticated, remote attacker to manipulate the value of the trustedkey, controlkey, or requestkey via a crafted packet, preventing authentication with ntpd until the daemon has been restarted. (CVE-2016-2517)
An out-of-bounds read error exists in the MATCH_ASSOC() function that occurs during the creation of peer associations with hmode greater than 7. An authenticated, remote attacker can exploit this, via a specially crafted packet, to cause a denial of service.
(CVE-2016-2518)
An overflow condition exists in the ctl_getitem() function in ntpd due to improper validation of user-supplied input when reporting return values. An authenticated, remote attacker can exploit this to cause ntpd to abort. (CVE-2016-2519)
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(102128);
script_version("3.10");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/04/21");
script_cve_id(
"CVE-2015-7974",
"CVE-2016-1550",
"CVE-2016-1551",
"CVE-2016-2517",
"CVE-2016-2518",
"CVE-2016-2519"
);
script_bugtraq_id(
81960,
88189,
88204,
88219,
88226,
88261
);
script_xref(name:"CERT", value:"718152");
script_name(english:"AIX NTP v3 Advisory : ntp_advisory7.asc (IV87614) (IV87419) (IV87615) (IV87420) (IV87939)");
script_summary(english:"Checks the version of the ntp packages.");
script_set_attribute(attribute:"synopsis", value:
"The remote AIX host has a version of NTP installed that is affected
by multiple vulnerabilities.");
script_set_attribute(attribute:"description", value:
"The version of NTP installed on the remote AIX host is affected by
the following vulnerabilities :
- A time serving flaw exists in the trusted key system
due to improper key checks. An authenticated, remote
attacker can exploit this to perform impersonation
attacks between authenticated peers. (CVE-2015-7974)
- An information disclosure vulnerability exists in the
message authentication functionality in libntp that is
triggered during the handling of a series of specially
crafted messages. An adjacent attacker can exploit this
to partially recover the message digest key.
(CVE-2016-1550)
- A flaw exists due to improper filtering of IPv4 'bogon'
packets received from a network. An unauthenticated,
remote attacker can exploit this to spoof packets to
appear to come from a specific reference clock.
(CVE-2016-1551)
- A denial of service vulnerability exists that allows an
authenticated, remote attacker to manipulate the value
of the trustedkey, controlkey, or requestkey via a
crafted packet, preventing authentication with ntpd
until the daemon has been restarted. (CVE-2016-2517)
- An out-of-bounds read error exists in the MATCH_ASSOC()
function that occurs during the creation of peer
associations with hmode greater than 7. An
authenticated, remote attacker can exploit this, via a
specially crafted packet, to cause a denial of service.
(CVE-2016-2518)
- An overflow condition exists in the ctl_getitem()
function in ntpd due to improper validation of
user-supplied input when reporting return values. An
authenticated, remote attacker can exploit this to cause
ntpd to abort. (CVE-2016-2519)");
script_set_attribute(attribute:"see_also", value:"https://aix.software.ibm.com/aix/efixes/security/ntp_advisory7.asc");
script_set_attribute(attribute:"solution", value:
"A fix is available and can be downloaded from the IBM AIX website.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"vuln_publication_date", value:"2015/12/12");
script_set_attribute(attribute:"patch_publication_date", value:"2016/09/06");
script_set_attribute(attribute:"plugin_publication_date", value:"2017/08/03");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:ibm:aix");
script_set_attribute(attribute:"cpe", value:"cpe:/a:ntp:ntp");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"AIX Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2017-2023 Tenable Network Security, Inc.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/AIX/lslpp", "Host/local_checks_enabled", "Host/AIX/version");
exit(0);
}
include("aix.inc");
include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
oslevel = get_kb_item("Host/AIX/version");
if (isnull(oslevel)) audit(AUDIT_UNKNOWN_APP_VER, "AIX");
oslevel = oslevel - "AIX-";
oslevelcomplete = chomp(get_kb_item("Host/AIX/oslevelsp"));
if (isnull(oslevelcomplete)) audit(AUDIT_UNKNOWN_APP_VER, "AIX");
oslevelparts = split(oslevelcomplete, sep:'-', keep:0);
if ( max_index(oslevelparts) != 4 ) audit(AUDIT_UNKNOWN_APP_VER, "AIX");
ml = oslevelparts[1];
sp = oslevelparts[2];
if ( ! get_kb_item("Host/AIX/lslpp") ) audit(AUDIT_PACKAGE_LIST_MISSING);
if ( get_kb_item("Host/AIX/emgr_failure" ) ) exit(0, "This AIX package check is disabled because : "+get_kb_item("Host/AIX/emgr_failure") );
flag = 0;
aix_ntp_vulns = {
"5.3": {
"12": {
"09": {
"bos.net.tcp.client": {
"minfilesetver":"5.3.12.0",
"maxfilesetver":"5.3.12.10",
"patch":"(IV87614m9a|IV92194m9a|IV96305m9a)"
}
}
}
},
"6.1": {
"09": {
"05": {
"bos.net.tcp.client": {
"minfilesetver":"6.1.9.0",
"maxfilesetver":"6.1.9.102",
"patch":"(IV87419m5d)"
}
},
"06": {
"bos.net.tcp.client": {
"minfilesetver":"6.1.9.0",
"maxfilesetver":"6.1.9.102",
"patch":"(IV87419m6a|IV91803m6a)"
}
},
"07": {
"bos.net.tcp.client": {
"minfilesetver":"6.1.9.0",
"maxfilesetver":"6.1.9.102",
"patch":"(IV87419m7a|IV91803m6a|IV96306m9a)"
}
}
}
},
"7.1": {
"03": {
"05": {
"bos.net.tcp.client": {
"minfilesetver":"7.1.3.0",
"maxfilesetver":"7.1.3.45",
"patch":"(IV87615m5a|IV92193m5a)"
}
},
"06": {
"bos.net.tcp.client": {
"minfilesetver":"7.1.3.0",
"maxfilesetver":"7.1.3.46",
"patch":"(IV87615m6a|IV92193m5a)"
}
},
"07": {
"bos.net.tcp.client": {
"minfilesetver":"7.1.3.0",
"maxfilesetver":"7.1.3.47",
"patch":"(IV87615m7a|IV92193m5a|IV96307m9a)"
}
}
},
"04": {
"00": {
"bos.net.tcp.client": {
"minfilesetver":"7.1.4.0",
"maxfilesetver":"7.1.4.1",
"patch":"(IV87420m0a)"
}
},
"01": {
"bos.net.tcp.client": {
"minfilesetver":"7.1.4.0",
"maxfilesetver":"7.1.4.1",
"patch":"(IV87420m0a|IV91951m3a)"
}
},
"02": {
"bos.net.tcp.client": {
"minfilesetver":"7.1.4.0",
"maxfilesetver":"7.1.4.1",
"patch":"(IV87420m2a|IV91951m3a|IV96308m4a)"
}
}
}
},
"7.2": {
"00": {
"00": {
"bos.net.tcp.ntp": {
"minfilesetver":"7.2.0.0",
"maxfilesetver":"7.2.0.2",
"patch":"(IV87939m0b|IV92192m2a)"
},
"bos.net.tcp.ntpd": {
"minfilesetver":"7.2.0.0",
"maxfilesetver":"7.2.0.2",
"patch":"(IV87939m0b|IV92192m2a)"
}
},
"01": {
"bos.net.tcp.ntp": {
"minfilesetver":"7.2.0.0",
"maxfilesetver":"7.2.0.2",
"patch":"(IV87939m0b|IV92192m2a)"
},
"bos.net.tcp.ntpd": {
"minfilesetver":"7.2.0.0",
"maxfilesetver":"7.2.0.2",
"patch":"(IV87939m0b|IV92192m2a)"
}
},
"02": {
"bos.net.tcp.ntp": {
"minfilesetver":"7.2.0.0",
"maxfilesetver":"7.2.0.2",
"patch":"(IV87939m2a|IV92192m2a|IV96309m4a)"
},
"bos.net.tcp.ntpd": {
"minfilesetver":"7.2.0.0",
"maxfilesetver":"7.2.0.2",
"patch":"(IV87939m2a|IV92192m2a|IV96309m4a)"
}
}
}
}
};
version_report = "AIX " + oslevel;
if ( empty_or_null(aix_ntp_vulns[oslevel]) ) {
os_options = join( sort( keys(aix_ntp_vulns) ), sep:' / ' );
audit(AUDIT_OS_NOT, os_options, version_report);
}
version_report = version_report + " ML " + ml;
if ( empty_or_null(aix_ntp_vulns[oslevel][ml]) ) {
ml_options = join( sort( keys(aix_ntp_vulns[oslevel]) ), sep:' / ' );
audit(AUDIT_OS_NOT, "ML " + ml_options, version_report);
}
version_report = version_report + " SP " + sp;
if ( empty_or_null(aix_ntp_vulns[oslevel][ml][sp]) ) {
sp_options = join( sort( keys(aix_ntp_vulns[oslevel][ml]) ), sep:' / ' );
audit(AUDIT_OS_NOT, "SP " + sp_options, version_report);
}
foreach package ( keys(aix_ntp_vulns[oslevel][ml][sp]) ) {
package_info = aix_ntp_vulns[oslevel][ml][sp][package];
minfilesetver = package_info["minfilesetver"];
maxfilesetver = package_info["maxfilesetver"];
patch = package_info["patch"];
if (aix_check_ifix(release:oslevel, ml:ml, sp:sp, patch:patch, package:package, minfilesetver:minfilesetver, maxfilesetver:maxfilesetver) < 0) flag++;
}
if (flag)
{
aix_report_extra = ereg_replace(string:aix_report_get(), pattern:"[()]", replace:"");
aix_report_extra = ereg_replace(string:aix_report_extra, pattern:"[|]", replace:" or ");
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
extra : aix_report_extra
);
}
else
{
tested = aix_pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "bos.net.tcp.ntp / bos.net.tcp.ntpd / bos.net.tcp.client");
}
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-7974
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1550
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1551
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2517
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2518
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2519
aix.software.ibm.com/aix/efixes/security/ntp_advisory7.asc