Actively exploited in the wild
Cisco IOS, XR, and XE Software Buffer Overflow Vulnerability
Cisco - IOS, XR, and XE Software · Listed in the CISA KEV since 2022-03-03. This indicates confirmed attacks in production environments.
Required action: Apply updates per vendor instructions.
CVE-2018-0167
HighCVSS 8.8KEVSummary
Multiple buffer overflow vulnerabilities in the LLDP subsystem of Cisco IOS, IOS XE, and IOS XR Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) or execute arbitrary code with elevated privileges. The issue affects LLDP packet processing.
Risk Assessment
An attacker on the same L2 domain can remotely crash the device or execute code with elevated privileges. This can lead to serious network security breaches and data confidentiality loss.
Recommendation
Upgrade Cisco IOS/IOS XE/IOS XR software to versions containing fixes for Cisco Bug IDs CSCuo17183 and CSCvd73487. Restrict LLDP port access and apply network segmentation to minimize adjacent attack risk.
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Original NVD description (English source)
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.