CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:A/AC:L/Au:N/C:N/I:N/A:C
EPSS
Percentile
50.4%
A vulnerability in the IP version 6 (IPv6) packet handling routine of Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause a device to stop responding to neighbor solicitation (NS) requests, causing a limited denial of service (DoS) condition.
The vulnerability is due to improper processing of adjacencies in the IPv6 neighbor table. An attacker could exploit this vulnerability by sending a sequence of malformed IPv6 packets to an affected device. An exploit could allow the attacker to cause a device to stop responding to NS requests, causing a limited DoS condition.
#TRUSTED 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
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text in this plugin was extracted from Cisco
# Security Notice CVE-2013-6683. The text itself is copyright (C)
# Cisco.
#
include("compat.inc");
if (description)
{
script_id(71153);
script_version("1.8");
script_set_attribute(attribute:"plugin_modification_date", value:"2019/10/29");
script_cve_id("CVE-2013-6683");
script_bugtraq_id(63685);
script_xref(name:"CISCO-BUG-ID", value:"CSCtd15904");
script_name(english:"Cisco Nexus 4000 Series Switches IPv6 Denial of Service (CSCtd15904)");
script_summary(english:"Checks the NX-OS version.");
script_set_attribute(attribute:"synopsis", value:"The remote device is missing a vendor-supplied security patch.");
script_set_attribute(attribute:"description", value:
"A vulnerability in the IP version 6 (IPv6) packet handling routine of
Cisco NX-OS Software could allow an unauthenticated, adjacent attacker
to cause a device to stop responding to neighbor solicitation (NS)
requests, causing a limited denial of service (DoS) condition.
The vulnerability is due to improper processing of adjacencies in the
IPv6 neighbor table. An attacker could exploit this vulnerability by
sending a sequence of malformed IPv6 packets to an affected device. An
exploit could allow the attacker to cause a device to stop responding
to NS requests, causing a limited DoS condition.");
# https://tools.cisco.com/security/center/viewAlert.x?alertId=31740
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?ba5584b5");
script_set_attribute(attribute:"solution", value:"Apply the patch referenced in Cisco bug ID CSCtd15904.");
script_set_cvss_base_vector("CVSS2#AV:A/AC:L/Au:N/C:N/I:N/A:C");
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:"combined");
script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:nx-os");
script_set_attribute(attribute:"vuln_publication_date", value:"2013/11/12");
script_set_attribute(attribute:"patch_publication_date", value:"2013/11/12");
script_set_attribute(attribute:"plugin_publication_date", value:"2013/12/02");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2013-2019 Tenable Network Security, Inc.");
script_family(english:"CISCO");
script_dependencies("cisco_nxos_version.nasl");
script_require_keys("Host/Cisco/NX-OS/Version","Host/Cisco/NX-OS/Device", "Host/Cisco/NX-OS/Model");
exit(0);
}
include("audit.inc");
include("cisco_func.inc");
include("cisco_kb_cmd_func.inc");
device = get_kb_item_or_exit("Host/Cisco/NX-OS/Device");
model = get_kb_item_or_exit("Host/Cisco/NX-OS/Model");
version = get_kb_item_or_exit("Host/Cisco/NX-OS/Version");
# only affects nexus 4000 series systems
if (device != 'Nexus' || model !~ '^4[0-9][0-9][0-9]([^0-9]|$)') audit(AUDIT_HOST_NOT, "affected");
flag = 0;
override = 0;
if (version =~ "^4\.1\(2\)E1\(1[bdefghij]?\)") flag = 1;
if (get_kb_item("Host/local_checks_enabled"))
{
if (flag)
{
flag = 0;
buf = cisco_command_kb_item("Host/Cisco/Config/show_ipv6_interface", "show ipv6 interface");
if (check_cisco_result(buf))
{
if (preg(multiline:TRUE, pattern:"IPv6\s+is\s+enabled", string:buf)) { flag = 1; }
} else if (cisco_needs_enable(buf)) { flag = 1; override = 1; }
}
}
if (flag)
{
if(report_verbosity > 0)
{
report +=
'\n Cisco bug ID : CSCtd15904' +
'\n Model : ' + device + ' ' + model +
'\n Installed version : ' + version +
'\n';
security_warning(port:0, extra:report + cisco_caveat(override));
}
else security_warning(port:0, extra:cisco_caveat(override));
exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");