Cisco IOS/IOS XE LLDP Subsystem format string

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7.0$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Cisco IOS and IOS XE. The impacted element is an unknown function of the component LLDP Subsystem. This manipulation causes format string. This vulnerability is tracked as CVE-2018-0175. The attack is only possible within the local network. Moreover, an exploit is present. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Cisco IOS and IOS XE (Router Operating System) (version now known) and classified as critical. Affected by this vulnerability is some unknown processing of the component LLDP Subsystem. The manipulation with an unknown input leads to a format string vulnerability. The CWE definition for the vulnerability is CWE-134. The product uses a function that accepts a format string as an argument, but the format string originates from an external source. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Format String vulnerability 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: CSCvd73664.

The bug was discovered 03/28/2018. The weakness was disclosed 03/28/2018 with Cisco (Website). The advisory is shared at securityfocus.com. This vulnerability is known as CVE-2018-0175 since 11/27/2017. Access to the local network is required for this attack to succeed. The exploitation doesn't need any form of authentication. Technical details are unknown but an exploit is available.

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)). The CISA Known Exploited Vulnerabilities Catalog lists this issue since 03/03/2022 with a due date of 03/17/2022:

Apply updates per vendor instructions.

Upgrading eliminates this vulnerability. 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†). The entry VDB-115170 is pretty similar. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.1
VulDB Meta Temp Score: 7.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.0
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Format string
CWE: CWE-134 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Attacked

EPSS Score: 🔍
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KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
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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: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
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: securityfocus.com⛔
Researcher: Cisco.
Organization: Cisco
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-0175 (🔍)
GCVE (CVE): GCVE-0-2018-0175
GCVE (VulDB): GCVE-100-115177

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 (69), 01/17/2020 18:03 (7), 02/06/2021 12:28 (2), 02/06/2021 12:31 (1), 04/23/2024 17:05 (27), 07/24/2024 16:24 (1), 09/09/2024 22:29 (1), 10/28/2025 17:09 (3)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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