Cisco IOS/IOS XE/IOS XR LLDP Subsystem memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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7.5$5k-$25k0.00

Summaryinfo

A vulnerability was found in Cisco IOS, IOS XE and IOS XR. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the component LLDP Subsystem. The manipulation results in memory corruption. This vulnerability is known as CVE-2018-0167. Access to the local network is required for this attack. Furthermore, an exploit is available. Applying restrictive firewalling is recommended.

Detailsinfo

A vulnerability was found in Cisco IOS, IOS XE and IOS XR (Router Operating System) (version now known). It has been classified as critical. Affected is some unknown processing of the component LLDP Subsystem. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The bug was discovered 03/28/2018. The weakness was published 03/28/2018 with Cisco as cisco-sa-20180328-lldp as confirmed advisory (Website). The advisory is available at tools.cisco.com. This vulnerability is traded as CVE-2018-0167 since 11/27/2017. Access to the local network is required for this attack to succeed. The exploitation doesn't require any form of authentication. Technical details are unknown but an exploit is available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 10/28/2025).

It is declared as attacked. The vulnerability scanner Nessus provides a plugin with the ID 108881 (Cisco IOS XE Software Link Layer Discovery Protocol Buffer Overflow Vulnerabilities (cisco-sa-20180328-lldp)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CISCO and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 316212 (Cisco IOS, IOS XE, and IOS XR Software Link Layer Discovery Protocol Buffer Overflow Vulnerabilities(cisco-sa-20180328-lldp)). This issue was added on 03/03/2022 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 03/17/2022:

Apply updates per vendor instructions.

It is possible to mitigate the weakness by firewalling . A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (108881) and SecurityFocus (BID 103564†). Similar entry is available at VDB-115177. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.5

VulDB Base Score: 6.3
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Attacked
KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
KEV Notice: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 108881
Nessus Name: Cisco IOS XE Software Link Layer Discovery Protocol Buffer Overflow Vulnerabilities (cisco-sa-20180328-lldp)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Firewall
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

11/27/2017 🔍
03/28/2018 +121 days 🔍
03/28/2018 +0 days 🔍
03/28/2018 +0 days 🔍
03/28/2018 +0 days 🔍
03/28/2018 +0 days 🔍
03/29/2018 +1 days 🔍
04/06/2018 +8 days 🔍
10/28/2025 +2762 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20180328-lldp
Researcher: Cisco.
Organization: Cisco
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-0167 (🔍)
GCVE (CVE): GCVE-0-2018-0167
GCVE (VulDB): GCVE-100-115170

OVAL: 🔍

SecurityFocus: 103564 - Cisco IOS/IOS XE/IOS XR Software Multiple Remote Code Execution and Format String Vulnerabilities
SecurityTracker: 1040586

scip Labs: https://www.scip.ch/en/?labs.20150108
See also: 🔍

Entryinfo

Created: 03/29/2018 09:14
Updated: 10/28/2025 17:09
Changes: 03/29/2018 09:14 (72), 01/17/2020 17:22 (6), 02/06/2021 11:38 (2), 02/06/2021 11:40 (1), 04/23/2024 16:27 (27), 07/24/2024 17:10 (1), 09/09/2024 22:29 (1), 10/28/2025 17:09 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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