The version of NTP installed on the remote AIX host is affected by the following vulnerabilities :
An out-of-bounds write error exists in the mx4200_send() function within file ntpd/refclock_mx4200.c due to improper handling of the return value of the snprintf() and vsnprintf() functions. An unauthenticated, remote attacker can exploit this to cause a denial of service condition or possibly the execution of arbitrary code.
However, neither the researcher nor vendor could find any exploitable code path. (CVE-2017-6451)
Multiple stack-based buffer overflow conditions exist in various wrappers around the ctl_putdata() function within file ntpd/ntp_control.c due to improper validation of certain input from the ntp.conf file.
An unauthenticated, remote attacker can exploit these, by convincing a user into deploying a specially crafted ntp.conf file, to cause a denial of service condition or possibly the execution of arbitrary code.
(CVE-2017-6458)
A stack-based buffer overflow condition exists in the datum_pts_receive() function within file ntpd/refclock_datum.c when handling handling packets from the โ/dev/datumโ device due to improper validation of certain input. A local attacker can exploit this to cause a denial of service condition or the execution of arbitrary code. (CVE-2017-6462)
A denial of service vulnerability exists when handling configuration directives. An authenticated, remote attacker can exploit this, via a malformed โmodeโ configuration directive, to crash the ntpd daemon.
(CVE-2017-6464)
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(102130);
script_version("3.12");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/04/21");
script_cve_id(
"CVE-2017-6451",
"CVE-2017-6458",
"CVE-2017-6462",
"CVE-2017-6464"
);
script_bugtraq_id(
97045,
97050,
97051,
97058
);
script_xref(name:"CERT", value:"325339");
script_name(english:"AIX NTP v3 Advisory : ntp_advisory9.asc (IV96305) (IV96306) (IV96307) (IV96308) (IV96309) (IV96310)");
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 :
- An out-of-bounds write error exists in the mx4200_send()
function within file ntpd/refclock_mx4200.c due to
improper handling of the return value of the snprintf()
and vsnprintf() functions. An unauthenticated, remote
attacker can exploit this to cause a denial of service
condition or possibly the execution of arbitrary code.
However, neither the researcher nor vendor could find
any exploitable code path. (CVE-2017-6451)
- Multiple stack-based buffer overflow conditions exist in
various wrappers around the ctl_putdata() function
within file ntpd/ntp_control.c due to improper
validation of certain input from the ntp.conf file.
An unauthenticated, remote attacker can exploit these,
by convincing a user into deploying a specially
crafted ntp.conf file, to cause a denial of service
condition or possibly the execution of arbitrary code.
(CVE-2017-6458)
- A stack-based buffer overflow condition exists in the
datum_pts_receive() function within file
ntpd/refclock_datum.c when handling handling packets
from the '/dev/datum' device due to improper validation
of certain input. A local attacker can exploit this to
cause a denial of service condition or the execution of
arbitrary code. (CVE-2017-6462)
- A denial of service vulnerability exists when handling
configuration directives. An authenticated, remote
attacker can exploit this, via a malformed 'mode'
configuration directive, to crash the ntpd daemon.
(CVE-2017-6464)");
script_set_attribute(attribute:"see_also", value:"https://aix.software.ibm.com/aix/efixes/security/ntp_advisory9.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:S/C:P/I:P/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:L/UI:N/S:U/C:H/I:N/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"vuln_publication_date", value:"2017/02/11");
script_set_attribute(attribute:"patch_publication_date", value:"2017/07/06");
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":"(IV96305m9a)"
}
}
}
},
"6.1": {
"09": {
"07": {
"bos.net.tcp.client": {
"minfilesetver":"6.1.9.0",
"maxfilesetver":"6.1.9.201",
"patch":"(IV96306m9a)"
}
},
"08": {
"bos.net.tcp.client": {
"minfilesetver":"6.1.9.0",
"maxfilesetver":"6.1.9.201",
"patch":"(IV96306m9a)"
}
},
"09": {
"bos.net.tcp.client": {
"minfilesetver":"6.1.9.0",
"maxfilesetver":"6.1.9.201",
"patch":"(IV96306m9a)"
}
}
}
},
"7.1": {
"03": {
"07": {
"bos.net.tcp.client": {
"minfilesetver":"7.1.3.0",
"maxfilesetver":"7.1.3.49",
"patch":"(IV96307m9a)"
}
},
"08": {
"bos.net.tcp.client": {
"minfilesetver":"7.1.3.0",
"maxfilesetver":"7.1.3.49",
"patch":"(IV96307m9a)"
}
},
"09": {
"bos.net.tcp.client": {
"minfilesetver":"7.1.3.0",
"maxfilesetver":"7.1.3.49",
"patch":"(IV96307m9a)"
}
}
},
"04": {
"02": {
"bos.net.tcp.client": {
"minfilesetver":"7.1.4.0",
"maxfilesetver":"7.1.4.32",
"patch":"(IV96308m4a)"
}
},
"03": {
"bos.net.tcp.client": {
"minfilesetver":"7.1.4.0",
"maxfilesetver":"7.1.4.32",
"patch":"(IV96308m4a)"
}
},
"04": {
"bos.net.tcp.client": {
"minfilesetver":"7.1.4.0",
"maxfilesetver":"7.1.4.32",
"patch":"(IV96308m4a)"
}
},
"05": {
"bos.net.tcp.client": {
"minfilesetver":"7.1.4.0",
"maxfilesetver":"7.1.4.32",
"patch":"(IV96308m4b)"
}
}
}
},
"7.2": {
"00": {
"02": {
"bos.net.tcp.ntp": {
"minfilesetver":"7.2.0.0",
"maxfilesetver":"7.2.0.2",
"patch":"(IV96309m4a)"
},
"bos.net.tcp.ntpd": {
"minfilesetver":"7.2.0.0",
"maxfilesetver":"7.2.0.3",
"patch":"(IV96309m4a)"
}
},
"03": {
"bos.net.tcp.ntp": {
"minfilesetver":"7.2.0.0",
"maxfilesetver":"7.2.0.2",
"patch":"(IV96309m4a)"
},
"bos.net.tcp.ntpd": {
"minfilesetver":"7.2.0.0",
"maxfilesetver":"7.2.0.3",
"patch":"(IV96309m4a)"
}
},
"04": {
"bos.net.tcp.ntp": {
"minfilesetver":"7.2.0.0",
"maxfilesetver":"7.2.0.2",
"patch":"(IV96309m4a)"
},
"bos.net.tcp.ntpd": {
"minfilesetver":"7.2.0.0",
"maxfilesetver":"7.2.0.3",
"patch":"(IV96309m4a)"
}
},
"05": {
"bos.net.tcp.ntp": {
"minfilesetver":"7.2.0.0",
"maxfilesetver":"7.2.0.2",
"patch":"(IV96309m4a)"
},
"bos.net.tcp.ntpd": {
"minfilesetver":"7.2.0.0",
"maxfilesetver":"7.2.0.3",
"patch":"(IV96309m4a)"
}
}
},
"01": {
"00": {
"bos.net.tcp.ntp": {
"minfilesetver":"7.2.1.0",
"maxfilesetver":"7.2.1.0",
"patch":"(IV96310m2a)"
},
"bos.net.tcp.ntpd": {
"minfilesetver":"7.2.1.0",
"maxfilesetver":"7.2.1.1",
"patch":"(IV96310m2a)"
}
},
"01": {
"bos.net.tcp.ntp": {
"minfilesetver":"7.2.1.0",
"maxfilesetver":"7.2.1.0",
"patch":"(IV96310m2a)"
},
"bos.net.tcp.ntpd": {
"minfilesetver":"7.2.1.0",
"maxfilesetver":"7.2.1.1",
"patch":"(IV96310m2a)"
}
},
"02": {
"bos.net.tcp.ntp": {
"minfilesetver":"7.2.1.0",
"maxfilesetver":"7.2.1.0",
"patch":"(IV96310m2a)"
},
"bos.net.tcp.ntpd": {
"minfilesetver":"7.2.1.0",
"maxfilesetver":"7.2.1.1",
"patch":"(IV96310m2a)"
}
},
"03": {
"bos.net.tcp.ntp": {
"minfilesetver":"7.2.1.0",
"maxfilesetver":"7.2.1.0",
"patch":"(IV96310m2a)"
},
"bos.net.tcp.ntpd": {
"minfilesetver":"7.2.1.0",
"maxfilesetver":"7.2.1.1",
"patch":"(IV96310m2a)"
}
}
}
}
};
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");
}