CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:A/AC:L/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS
Percentile
29.6%
According to its self-reported version, the Cisco NX-OS Software in ACI mode is affected by a security bypass vulnerability. An unauthenticated, adjacent attacker could exploit this vulnerability to connect an unauthorized server to the highly privileged infrastructure VLAN. Please see the included Cisco BIDs and Cisco Security Advisory for more information.
#TRUSTED 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
#
# (C) Tenable Network Security, Inc.
#
include("compat.inc");
if (description)
{
script_id(126629);
script_version("1.7");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/04/27");
script_cve_id("CVE-2019-1890");
script_bugtraq_id(109052);
script_xref(name:"IAVA", value:"2019-A-0217");
script_xref(name:"CISCO-BUG-ID", value:"CSCvp64280");
script_xref(name:"CISCO-SA", value:"cisco-sa-20190703-n9kaci-bypass");
script_name(english:"Cisco Nexus 9000 Series Fabric Switches ACI Mode Fabric Infrastructure VLAN Unauthorized Access Vulnerability");
script_summary(english:"Checks the version of Cisco NX-OS System Software");
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 NX-OS Software in
ACI mode is affected by a security bypass vulnerability. An
unauthenticated, adjacent attacker could exploit this vulnerability to
connect an unauthorized server to the highly privileged infrastructure
VLAN. Please see the included Cisco BIDs and Cisco Security Advisory
for more information.");
# https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190703-n9kaci-bypass
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?f9ac6846");
script_set_attribute(attribute:"see_also", value:"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvp64280");
script_set_attribute(attribute:"solution", value:
"Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvp64280");
script_set_cvss_base_vector("CVSS2#AV:A/AC:L/Au:N/C:N/I:P/A:N");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-1890");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_cwe_id(284);
script_set_attribute(attribute:"vuln_publication_date", value:"2019/07/03");
script_set_attribute(attribute:"patch_publication_date", value:"2019/07/03");
script_set_attribute(attribute:"plugin_publication_date", value:"2019/07/12");
script_set_attribute(attribute:"potential_vulnerability", value:"true");
script_set_attribute(attribute:"plugin_type", value:"combined");
script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:nx-os");
script_set_attribute(attribute:"stig_severity", value:"I");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"CISCO");
script_copyright(english:"This script is Copyright (C) 2019-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("cisco_nxos_version.nasl");
script_require_keys("Host/Cisco/NX-OS/Version", "Host/Cisco/NX-OS/Model", "Host/Cisco/NX-OS/Device", "Settings/ParanoidReport");
exit(0);
}
include('audit.inc');
include('cisco_workarounds.inc');
include('ccf.inc');
if (report_paranoia < 2) audit(AUDIT_PARANOID);
product_info = cisco::get_product_info(name:'Cisco NX-OS Software');
if ('Nexus' >!< product_info['device'] || product_info['model'] !~ '^90[0-9][0-9]')
audit(AUDIT_HOST_NOT, 'affected');
version_list=make_list(
'11.0.1b',
'11.0.1c',
'11.0.1d',
'11.0.1e',
'11.0.2j',
'11.0.2m',
'11.0.3f',
'11.0.3i',
'11.0.3k',
'11.0.3n',
'11.0.3o',
'11.0.4h',
'11.0.4o',
'11.0.4q',
'11.0.4g',
'11.1.1j',
'11.1.1o',
'11.1.1r',
'11.1.1s',
'11.1.2h',
'11.1.2i',
'11.1.3f',
'11.1.4',
'11.1.4e',
'11.1.4f',
'11.1.4g',
'11.1.4i',
'11.1.4l',
'11.1.4m',
'11.2.1i',
'11.2.2g',
'11.2.3c',
'11.2.2h',
'11.2.2i',
'11.2.3e',
'11.2.3h',
'11.2.3m',
'11.2.1k',
'11.2.1m',
'11.2.2j',
'12.0.1m',
'12.0.2g',
'12.0.1n',
'12.0.1o',
'12.0.1p',
'12.0.1q',
'12.0.2h',
'12.0.2l',
'12.0.2m',
'12.0.2n',
'12.0.2o',
'12.0.2f',
'12.0.1r',
'12.1.1h',
'12.1.2e',
'12.1.3g',
'12.1.4a',
'12.1.1i',
'12.1.2g',
'12.1.2k',
'12.1.3h',
'12.1.3j',
'12.2.1n',
'12.2.2e',
'12.2.3j',
'12.2.4f',
'12.2.4p',
'12.2.3p',
'12.2.3r',
'12.2.3s',
'12.2.3t',
'12.2.2f',
'12.2.2g',
'12.2.2i',
'12.2.2j',
'12.2.2k',
'12.2.2q',
'12.2.1o',
'12.2.4q',
'12.2.4r',
'12.2.1k',
'12.3.1e',
'12.3.1f',
'12.3.1i',
'12.3.1l',
'12.3.1o',
'12.3.1p',
'13.0.1k',
'13.0.2h',
'13.0.2k',
'13.0.2n',
'13.0.1i',
'13.0.2m',
'13.1.1i',
'13.1.2m',
'13.1.2o',
'13.1.2p',
'13.1.2q',
'13.1.2s',
'13.1.2t',
'13.1.2u',
'13.2.1l',
'13.2.1m',
'13.2.2l',
'13.2.2o',
'13.2.3i',
'13.2.3n',
'13.2.3o',
'13.2.3r',
'13.2.4d',
'13.2.4e',
'13.2.3j',
'13.2.3s',
'13.2.5d',
'13.2.5e',
'13.2.5f',
'13.2.6i',
'11.3.1g',
'11.3.2f',
'11.3.1h',
'11.3.1i',
'11.3.2h',
'11.3.2i',
'11.3.2k',
'11.3.1j',
'11.3.2j',
'14.0.1h',
'14.0.2c',
'14.0.3d',
'14.0.3c',
'14.1.1i',
'14.1.1j',
'14.1.1k',
'14.1.1l'
);
workarounds = make_list(CISCO_WORKAROUNDS['generic_workaround']);
workaround_params = WORKAROUND_CONFIG['aci_secmode_strict'];
reporting = make_array(
'port' , 0,
'severity' , SECURITY_NOTE,
'version' , product_info['version'],
'bug_id' , 'CSCvp64280'
);
cisco::check_and_report(
product_info:product_info,
workarounds:workarounds,
workaround_params:workaround_params,
reporting:reporting,
vuln_versions:version_list
);
CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:A/AC:L/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS
Percentile
29.6%