Vulnerability Monitor

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CVE-2018-0167

Multiple Buffer Overflow vulnerabilities in the Link Layer Discovery Protocol (LLDP) subsystem of Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition or execute arbitrary code with elevated privileges on an affected device. Cisco Bug IDs: CSCuo17183, CSCvd73487.

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 8.8, indicating it requires adjacent network access with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 18 products from cisco, from cisco, from cisco and 15 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

2018-03-28T22:29:00.907

Last Modified

2026-01-14T18:45:33.313

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 8.8 (HIGH)

CVSSv2 Vector

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

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

Exploitability Score

6.5

Impact Score

10.0

Weaknesses

Type: Secondary
CWE-119
Type: Primary
CWE-119

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	cisco	ios	5.2.0.base	Yes
Operating System	cisco	ios_xe	5.2.0.base	Yes
Operating System	cisco	ios_xr	< 5.1.3	Yes
Hardware	cisco	asr_9001	-	No
Hardware	cisco	asr_9006	-	No
Hardware	cisco	asr_9010	-	No
Hardware	cisco	asr_9904	-	No
Hardware	cisco	asr_9906	-	No
Hardware	cisco	asr_9910	-	No
Hardware	cisco	asr_9912	-	No
Hardware	cisco	asr_9922	-	No
Operating System	cisco	ios	≤ 15.6.3m1	Yes
Operating System	cisco	ios_xe	≤ 15.6.3m1	Yes
Hardware	rockwellautomation	allen-bradley_stratix_5900	-	No
Operating System	cisco	ios	≤ 15.2\(6\)e0a	Yes
Operating System	cisco	ios_xe	≤ 15.2\(6\)e0a	Yes
Hardware	rockwellautomation	allen-bradley_armorstratix_5700	-	No
Hardware	rockwellautomation	allen-bradley_stratix_5400	-	No
Hardware	rockwellautomation	allen-bradley_stratix_5410	-	No
Hardware	rockwellautomation	allen-bradley_stratix_5700	-	No
Hardware	rockwellautomation	allen-bradley_stratix_8000	-	No
Operating System	cisco	ios	≤ 15.2\(4a\)ea5	Yes
Operating System	cisco	ios_xe	≤ 15.2\(4a\)ea5	Yes
Hardware	rockwellautomation	allen-bradley_stratix_8300	-	No

References

http://www.securityfocus.com/bid/103564 Broken Link, Third Party Advisory, VDB Entry ([email protected])
http://www.securitytracker.com/id/1040586 Broken Link, Third Party Advisory, VDB Entry ([email protected])
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-03 Third Party Advisory, US Government Resource ([email protected])
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04 Third Party Advisory, US Government Resource ([email protected])
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05 Third Party Advisory, US Government Resource ([email protected])
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-lldp Vendor Advisory ([email protected])
http://www.securityfocus.com/bid/103564 Broken Link, Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id/1040586 Broken Link, Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-03 Third Party Advisory, US Government Resource (af854a3a-2127-422b-91ae-364da2661108)
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04 Third Party Advisory, US Government Resource (af854a3a-2127-422b-91ae-364da2661108)
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05 Third Party Advisory, US Government Resource (af854a3a-2127-422b-91ae-364da2661108)
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-lldp Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0167 US Government Resource (134c704f-9b21-4f2e-91b3-4a467353bcc0)

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.