CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:N/I:N/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
54.1%
According to its self-reported version, the Cisco IOS software running on the remote device is affected by a denial of service vulnerability in the Autonomic Networking Infrastructure (ANI) component due to incomplete input validation of certain crafted IPv6 packets. An unauthenticated, remote attacker can exploit this issue, via specially crafted IPv6 packets, to cause the device to reload.
Note that this issue only affect devices with ANI enabled that have a reachable IPv6 interface.
#TRUSTED 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
#
# (C) Tenable Network Security, Inc.
#
include("compat.inc");
if (description)
{
script_id(97945);
script_version("1.16");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/04/19");
script_cve_id("CVE-2017-3850");
script_bugtraq_id(96971);
script_xref(name:"CISCO-BUG-ID", value:"CSCvc42729");
script_xref(name:"CISCO-SA", value:"cisco-sa-20170320-aniipv6");
script_name(english:"Cisco IOS ANI IPv6 Packets DoS (cisco-sa-20170320-aniipv6)");
script_summary(english:"Checks the IOS version.");
script_set_attribute(attribute:"synopsis", value:
"The remote device is missing a vendor-supplied security patch.");
script_set_attribute(attribute:"description", value:
"According to its self-reported version, the Cisco IOS software running
on the remote device is affected by a denial of service vulnerability
in the Autonomic Networking Infrastructure (ANI) component due to
incomplete input validation of certain crafted IPv6 packets. An
unauthenticated, remote attacker can exploit this issue, via specially
crafted IPv6 packets, to cause the device to reload.
Note that this issue only affect devices with ANI enabled that have a
reachable IPv6 interface.");
# https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170320-aniipv6
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?8d249229");
script_set_attribute(attribute:"solution", value:
"Apply the relevant patch referenced in Cisco Security Advisory
cisco-sa-20170320-aniipv6.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:C");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-3850");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"vuln_publication_date", value:"2017/03/20");
script_set_attribute(attribute:"patch_publication_date", value:"2017/03/20");
script_set_attribute(attribute:"plugin_publication_date", value:"2017/03/24");
script_set_attribute(attribute:"plugin_type", value:"combined");
script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:ios");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"CISCO");
script_copyright(english:"This script is Copyright (C) 2017-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("cisco_ios_version.nasl");
script_require_keys("Host/Cisco/IOS/Version");
exit(0);
}
include("audit.inc");
include("cisco_workarounds.inc");
include("ccf.inc");
product_info = cisco::get_product_info(name:"Cisco IOS");
version_list = make_list(
'15.3(3)S',
'15.3(3)S1',
'15.3(3)S2',
'15.3(3)S3',
'15.3(3)S6',
'15.3(3)S4',
'15.3(3)S5',
'15.2(3)E',
'15.2(4)E',
'15.2(3)E1',
'15.2(3)E2',
'15.2(3)E3',
'15.2(4)E1',
'15.2(4)E2',
'15.2(5)E',
'15.2(5b)E',
'15.4(1)S',
'15.4(3)S',
'15.4(1)S1',
'15.4(1)S2',
'15.4(2)S1',
'15.4(1)S3',
'15.4(3)S1',
'15.4(2)S2',
'15.4(3)S2',
'15.4(3)S3',
'15.4(1)S4',
'15.4(2)S3',
'15.4(2)S4',
'15.4(3)S4',
'15.4(3)S5',
'15.4(3)S6',
'15.5(1)S',
'15.5(2)S',
'15.5(1)S1',
'15.5(3)S',
'15.5(1)S2',
'15.5(1)S3',
'15.5(2)S1',
'15.5(2)S2',
'15.5(3)S1',
'15.5(3)S1a',
'15.5(2)S3',
'15.5(3)S2',
'15.5(3)S0a',
'15.5(3)S3',
'15.5(1)S4',
'15.5(3)SN',
'15.6(1)S',
'15.6(2)S',
'15.6(2)S1',
'15.6(1)S1',
'15.6(1)S2',
'15.6(1)T',
'15.6(2)T',
'15.6(1)T0a',
'15.6(1)T1',
'15.6(2)T1',
'15.6(1)T2',
'15.6(2)T2',
'15.6(2)SN',
'15.6(3)M'
);
workarounds = make_list(CISCO_WORKAROUNDS['generic_workaround']);
workaround_params = WORKAROUND_CONFIG['ipv6_enabled'];
reporting = make_array(
'port' , 0,
'severity' , SECURITY_HOLE,
'version' , product_info['version'],
'bug_id' , "CSCvc42729",
'cmds' , make_list("show running-config")
);
cisco::check_and_report(product_info:product_info, workarounds:workarounds, workaround_params:workaround_params, reporting:reporting, vuln_versions:version_list);
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:N/I:N/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
54.1%