Home/CVE/Cisco IOS, XR, and XE Software Buffer Overflow Vulnerability
CVE

CVE-2018-0167

Cisco IOS, XR, and XE Software Buffer Overflow Vulnerability

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.

HIGH · CVSS 8.8 ⚠ CISA KEV EPSS 0.01211
Act now
  • Listed on CISA KEV (known exploited in the wild)
  • SSVC exploitation status: active
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬢

Required Remediation

Apply updates per vendor instructions.

⬡

Weakness Classification

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

Affected Products & Versions

9
cisco iosall versions
cisco ios xeall versions
cisco ios xr>= 4.1 and < 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
▣

Scoring & Timeline

8.8
HIGH · CVSS v3.1 · psirt@cisco.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD28 Mar 2018 · 10:29 PM
CVSS VectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

5
cisaKEV-CVE-2018-0167
cisco-csafcisco-sa-20180328-lldp
cisa-csafcisa-csaf-csaf_files-OT-white-2018-icsa-18-107-03
cisa-csafcisa-csaf-csaf_files-OT-white-2018-icsa-18-107-04
cisa-csafcisa-csaf-csaf_files-OT-white-2018-icsa-18-107-05
🔗

References & Sources

7
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.securityfocus.com/bid/103564Broken LinkThird Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1040586Broken LinkThird Party AdvisoryVDB Entry
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-03Third Party AdvisoryUS Government Resource
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04Third Party AdvisoryUS Government Resource
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05Third Party AdvisoryUS Government Resource
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-lldpVendor Advisory
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