Skip to main content

CVE-2018-0167

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

Cisco · CWE-119 · in CISA KEV since 2022-03-03

KEV since 2022 · listed over a yearCISA KEVActively Exploited
75

EVRS 75 of 100 Urgent

Patch This Cycle

Rank 1,174 of 2,960 tracked

Raised to the floor for a confirmed exploited vulnerability.

Download PDF

Why it scores 75

Evidence available: 6 of 7 signals

Listed in the CISA KEV catalog, and an EPSS probability of 0.034.

  • CISA KEVApplied
  • RansomwareDid not apply
  • Vendor exploitationDid not apply
  • EPSSApplied
  • Microsoft Exploitability IndexNot applicable
  • Pre-patch disclosureNo data
  • KEV recencyDid not apply
  • CVSSApplied

The band answers “how soon”, not “how bad”. No data for: Pre-patch disclosure. Why some signals show no data

Fix

Patch or fixed version identified

CISA required action

Fixed in

ios xr: update to 5.1.3 or later | ios: update to a version newer than 15.6.3m1 | ios xe: update to a version newer than 15.6.3m1 | ios: update to a version newer than 15.2\(6\)e0a | ios xe: update to a version newer than 15.2\(6\)e0a | ios: update to a version newer than 15.2\(4a\)ea5

Affected versions

  • ios5.2.0.base<= 15.6.3m1<= 15.2\(6\)e0a<= 15.2\(4a\)ea5
  • ios xe5.2.0.base<= 15.6.3m1<= 15.2\(6\)e0a<= 15.2\(4a\)ea5
  • ios xr>= 4.1 < 5.1.3
  • asr 9001
  • asr 9006
  • asr 9010
  • asr 9904
  • asr 9906

+10 more affected products; see the full list at NVD.

Remediation

Apply updates per vendor instructions.

Fixed versions from NVD.

Evidence

Each value with its source
MeasureValueSource
CVSS base scoreHow severe the flaw is in itself. It does not say how likely an attack is. 8.8 NVD
FIRST EPSSFIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs. 0.034 (88.6th pctl) FIRST EPSS
Actively exploitedWhether a source of record has confirmed attacks using it in the wild. Confirmed CISA KEV
Ransomware campaign useWhether CISA has seen ransomware operators use it. Unknown or none CISA KEV
CISA remediation deadlineThe date US federal agencies must have fixed or mitigated it. 2022-03-17 · KEV since 2022 · listed over a year CISA KEV
Public exploit moduleA module existing is not the same as active exploitation. None known Metasploit
EUVD cross-referenceENISA's record: CVSS 8.8 (v3.1), assigned by cisco. Listed ENISA EUVD

Description

NVD

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.

What CISA says to do