6.4 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:P/A:P
0.965 High
EPSS
Percentile
99.6%
The remote host is missing AIX PTF U832257, which is related to the security of the package bos.net.tcp.client.
NTP mode 7 (MODE_PRIVATE) is used by the ntpdc query and control utility. In contrast, ntpq uses NTP mode 6 (MODE_CONTROL), while routine NTP time transfers use modes 1 through 5. Upon receipt of an incorrect mode 7 request or a mode 7 error response from an address that is not listed in a βrestrict β¦ noqueryβ or βrestrict β¦
ignoreβ segment, ntpd will reply with a mode 7 error response and log a message.
If an attacker spoofs the source address of ntpd host A in a mode 7 response packet sent to ntpd host B, both A and B will continuously send each other error responses, for as long as those packets get through.
If an attacker spoofs an address of ntpd host A in a mode 7 response packet sent to ntpd host A, then host A will respond to itself endlessly, consuming CPU and logging excessively.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were extracted
# from AIX Security PTF U832257. The text itself is copyright (C)
# International Business Machines Corp.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(46470);
script_version("1.11");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/04");
script_cve_id("CVE-2009-3563");
script_bugtraq_id(37255);
script_name(english:"AIX 5.3 TL 8 : bos.net.tcp.client (U832257)");
script_summary(english:"Check for PTF U832257");
script_set_attribute(
attribute:"synopsis",
value:"The remote AIX host is missing a vendor-supplied security patch."
);
script_set_attribute(
attribute:"description",
value:
"The remote host is missing AIX PTF U832257, which is related to the
security of the package bos.net.tcp.client.
NTP mode 7 (MODE_PRIVATE) is used by the ntpdc query and control
utility. In contrast, ntpq uses NTP mode 6 (MODE_CONTROL), while
routine NTP time transfers use modes 1 through 5. Upon receipt of an
incorrect mode 7 request or a mode 7 error response from an address
that is not listed in a 'restrict ... noquery' or 'restrict ...
ignore' segment, ntpd will reply with a mode 7 error response and log
a message.
If an attacker spoofs the source address of ntpd host A in a mode 7
response packet sent to ntpd host B, both A and B will continuously
send each other error responses, for as long as those packets get
through.
If an attacker spoofs an address of ntpd host A in a mode 7
response packet sent to ntpd host A, then host A will
respond to itself endlessly, consuming CPU and logging
excessively.
"
);
script_set_attribute(
attribute:"see_also",
value:"http://www-01.ibm.com/support/docview.wss?uid=isg1IZ68659"
);
script_set_attribute(
attribute:"solution",
value:"Install the appropriate missing security-related fix."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:ibm:aix:5.3");
script_set_attribute(attribute:"vuln_publication_date", value:"2010/01/25");
script_set_attribute(attribute:"patch_publication_date", value:"2010/01/25");
script_set_attribute(attribute:"plugin_publication_date", value:"2010/05/19");
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:"AIX Local Security Checks");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/AIX/oslevel", "Host/AIX/version", "Host/AIX/lslpp");
exit(0);
}
include("audit.inc");
include("global_settings.inc");
include("aix.inc");
if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if ( ! get_kb_item("Host/AIX/version") ) audit(AUDIT_OS_NOT, "AIX");
if ( ! get_kb_item("Host/AIX/lslpp") ) audit(AUDIT_PACKAGE_LIST_MISSING);
flag = 0;
if ( aix_check_patch(ml:"530008", patch:"U832257", package:"bos.net.tcp.client.5.3.8.12") < 0 ) flag++;
if (flag)
{
if (report_verbosity > 0) security_warning(port:0, extra:aix_report_get());
else security_warning(0);
exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");