CVEvulnerability

CVE-2018-0167

8.8 HIGH Known exploited Published 2018-03-28 Modified 2026-06-17 Official page ↗

CISA Known Exploited Vulnerability

Cisco IOS, XR, and XE Software Buffer Overflow Vulnerability — Cisco IOS, XR, and XE Software

There is a buffer overflow vulnerability in the Link Layer Discovery Protocol (LLDP) subsystem of Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR Software which could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition or execute arbitrary code.

Added to KEV: 2022-03-03
Remediation due: 2022-03-17
Ransomware use: Unknown
Required action: Apply updates per vendor instructions.
Notes: https://nvd.nist.gov/vuln/detail/CVE-2018-0167

Status: Analyzed
Published: 2018-03-28
Last modified: 2026-06-17
Assigner: [email protected]
CVSS 3.1 ([email protected]): 8.8 HIGH — CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0): 8.8 HIGH — CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected]): 8.3 HIGH — AV:A/AC:L/Au:N/C:C/I:C/A:C
Weaknesses: CWE-119

Description

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.

Affected configurations

• cisco ios 5.2.0.base • cisco ios xe 5.2.0.base • cisco ios xr (>= 4.1 < 5.1.3) • cisco ios (<= 15.6.3m1) • cisco ios xe (<= 15.6.3m1) • cisco ios (<= 15.2\(6\)e0a) • cisco ios xe (<= 15.2\(6\)e0a) • cisco ios (<= 15.2\(4a\)ea5) • cisco ios xe (<= 15.2\(4a\)ea5)

Weakness · CWE (1)

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer weakness

References