CVE-2018-0167: Cisco IOS, XR, and XE Software Buffer Overflow Vulnerability

Vulnerability summary

CVE-2018-0167 is a high (CVSS 8.8) vulnerability in Cisco IOS, XR, and XE Software. It is known to be exploited: CISA lists it, first on 03-03-2022. EPSS estimates a 3.35% chance of exploitation in the next 30 days, higher than 88.5% of scored vulnerabilities.

Timeline

1. 28-03-2018
   PublishedVulnerability first disclosed.
2. 03-03-2022
   Added to CISA KEVCisco IOS, XR, and XE Software Buffer Overflow Vulnerability
3. 17-03-2022
   CISA remediation dueApply updates per vendor instructions.
4. 12-01-2026
   Last modifiedVulnerability information updated.

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.

• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferThe product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.