Vulnerability Monitor

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CVE-2018-0306

A vulnerability in the CLI parser of Cisco NX-OS Software could allow an authenticated, local attacker to perform a command-injection attack on an affected device. The vulnerability is due to insufficient input validation of command arguments. An attacker could exploit this vulnerability by injecting malicious command arguments into a vulnerable CLI command. A successful exploit could allow the attacker to execute arbitrary commands with root privileges on the affected device. Note: This vulnerability requires that any feature license is uploaded to the device. The vulnerability does not require that the license be used. This vulnerability affects MDS 9000 Series Multilayer Switches, Nexus 1000V Series Switches, Nexus 1100 Series Cloud Services Platforms, Nexus 2000 Series Fabric Extenders, Nexus 3000 Series Switches, Nexus 3500 Platform Switches, Nexus 3600 Platform Switches, Nexus 5500 Platform Switches, Nexus 5600 Platform Switches, Nexus 6000 Series Switches, Nexus 7000 Series Switches, Nexus 7700 Series Switches, Nexus 9000 Series Switches in standalone NX-OS mode, Nexus 9500 R-Series Line Cards and Fabric Modules. Cisco Bug IDs: CSCve51693, CSCve91634, CSCve91659, CSCve91663.

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.8, requiring local system access to exploit with relatively low complexity without requiring user interaction requiring only low-level privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 89 products from cisco, from cisco, from cisco and 86 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2018, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2018-06-21T11:29:00.523

Last Modified

2024-11-21T03:37:56.550

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.8 (HIGH)

CVSSv2 Vector

AV:L/AC:L/Au:N/C:C/I:C/A:C

Access Vector: LOCAL
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: COMPLETE
Integrity Impact: COMPLETE
Availability Impact: COMPLETE

Exploitability Score

3.9

Impact Score

10.0

Weaknesses

Type: Secondary
CWE-20
Type: Primary
CWE-78

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	cisco	nx-os	< 7.3\(3\)n1\(1\)	Yes
Hardware	cisco	nexus_5000	-	No
Hardware	cisco	nexus_5010	-	No
Hardware	cisco	nexus_5020	-	No
Hardware	cisco	nexus_5548p	-	No
Hardware	cisco	nexus_5548up	-	No
Hardware	cisco	nexus_5596t	-	No
Hardware	cisco	nexus_5596up	-	No
Hardware	cisco	nexus_56128p	-	No
Hardware	cisco	nexus_5624q	-	No
Hardware	cisco	nexus_5648q	-	No
Hardware	cisco	nexus_5672up	-	No
Hardware	cisco	nexus_5696q	-	No
Operating System	cisco	nx-os	8.1\(0.2\)s0	Yes
Hardware	cisco	nexus_7000	-	No
Hardware	cisco	nexus_7700	-	No
Operating System	cisco	nx-os	8.1\(0\)bd\(0.20\)	Yes
Operating System	cisco	nx-os	8.1\(0.59\)s0	Yes
Operating System	cisco	nx-os	8.1\(1\)	Yes
Hardware	cisco	nexus_92160yc-x	-	No
Hardware	cisco	nexus_92304qc	-	No
Hardware	cisco	nexus_9236c	-	No
Hardware	cisco	nexus_9272q	-	No
Hardware	cisco	nexus_93108tc-ex	-	No
Hardware	cisco	nexus_93120tx	-	No
Hardware	cisco	nexus_93128tx	-	No
Hardware	cisco	nexus_93180yc-ex	-	No
Hardware	cisco	nexus_9332pq	-	No
Hardware	cisco	nexus_9372px	-	No
Hardware	cisco	nexus_9372tx	-	No
Hardware	cisco	nexus_9396px	-	No
Hardware	cisco	nexus_9396tx	-	No
Hardware	cisco	nexus_9504	-	No
Hardware	cisco	nexus_9508	-	No
Hardware	cisco	nexus_9516	-	No
Hardware	cisco	nexus_n9k-c9508-fm-r	-	No
Hardware	cisco	nexus_n9k-x9636c-r	-	No
Hardware	cisco	nexus_n9k-x9636q-r	-	No
Operating System	cisco	nx-os	6.0\(2\)a8\(3\)	Yes
Hardware	cisco	nexus_172tq-xl	-	No
Hardware	cisco	nexus_3016	-	No
Hardware	cisco	nexus_3048	-	No
Hardware	cisco	nexus_3064-32t	-	No
Hardware	cisco	nexus_3064-t	-	No
Hardware	cisco	nexus_3064-x	-	No
Hardware	cisco	nexus_3100-v	-	No
Hardware	cisco	nexus_31128pq	-	No
Hardware	cisco	nexus_3132c-z	-	No
Hardware	cisco	nexus_3132q	-	No
Hardware	cisco	nexus_3132q-x	-	No
Hardware	cisco	nexus_3132q-xl	-	No
Hardware	cisco	nexus_3164q	-	No
Hardware	cisco	nexus_3172pq	-	No
Hardware	cisco	nexus_3172pq-xl	-	No
Hardware	cisco	nexus_3172tq	-	No
Hardware	cisco	nexus_3172tq-32t	-	No
Hardware	cisco	nexus_3232c	-	No
Hardware	cisco	nexus_3264c-e	-	No
Hardware	cisco	nexus_3264q	-	No
Hardware	cisco	nexus_34180yc	-	No
Hardware	cisco	nexus_3524-x	-	No
Hardware	cisco	nexus_3524-xl	-	No
Hardware	cisco	nexus_3548	-	No
Hardware	cisco	nexus_3548-x	-	No
Hardware	cisco	nexus_3548-xl	-	No
Hardware	cisco	nexus_3636c-r	-	No
Hardware	cisco	nexus_c36180yc-r	-	No
Operating System	cisco	nx-os	< 7.3\(3\)n1\(1\)	Yes
Hardware	cisco	nexus_2148t	-	No
Hardware	cisco	nexus_2224tp_ge	-	No
Hardware	cisco	nexus_2232pp_10ge	-	No
Hardware	cisco	nexus_2232tm-e_10ge	-	No
Hardware	cisco	nexus_2232tm_10ge	-	No
Hardware	cisco	nexus_2248pq_10ge	-	No
Hardware	cisco	nexus_2248tp-e	-	No
Hardware	cisco	nexus_2248tp_ge	-	No
Operating System	cisco	nx-os	< 7.3\(3\)n1\(1\)	Yes
Hardware	cisco	nexus_6001p	-	No
Hardware	cisco	nexus_6001t	-	No
Operating System	cisco	nx-os	< 5.2\(1\)sv3\(3.15\)	Yes
Hardware	cisco	nexus_1000v	-	No
Hardware	cisco	nexus_1110-s	-	No
Hardware	cisco	nexus_1110-x	-	No
Operating System	cisco	nx-os	< 8.1\(1a\)	Yes
Hardware	cisco	mds_9132t	-	No
Hardware	cisco	mds_9148	-	No
Hardware	cisco	mds_9148s	-	No
Hardware	cisco	mds_9148t	-	No
Hardware	cisco	mds_9222i	-	No
Hardware	cisco	mds_9250i	-	No
Hardware	cisco	mds_9396s	-	No
Hardware	cisco	mds_9396t	-	No
Hardware	cisco	mds_9506	-	No
Hardware	cisco	mds_9509	-	No
Hardware	cisco	mds_9513	-	No
Hardware	cisco	mds_9706	-	No
Hardware	cisco	mds_9710	-	No
Hardware	cisco	mds_9718	-	No

References

http://www.securitytracker.com/id/1041169 Third Party Advisory, VDB Entry ([email protected])
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180620-nx-os-cli-execution Vendor Advisory ([email protected])
http://www.securitytracker.com/id/1041169 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180620-nx-os-cli-execution Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For cisco's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.