A vulnerability in the Smart Install feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to improper validation of packet data. An attacker could exploit this vulnerability by sending a crafted packet to an affected device on TCP port 4786. Only Smart Install client switches are affected. Cisco devices that are configured as a Smart Install director are not affected by this vulnerability. Cisco Bug IDs: CSCvd40673.
Published 2018-03-28 22:29:00
Updated 2020-09-02 16:03:12
View at NVD,   CVE.org
Vulnerability category: Input validationDenial of service

CVE-2018-0156 is in the CISA Known Exploited Vulnerabilities Catalog

CISA vulnerability name:
Cisco IOS Software and Cisco IOS XE Software Smart Install Denial-of-Service Vulnerability
CISA required action:
Apply updates per vendor instructions.
CISA description:
A vulnerability in the Smart Install feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a denial-of-service (DoS) condition.
Notes:
https://nvd.nist.gov/vuln/detail/CVE-2018-0156
Added on 2022-03-03 Action due date 2022-03-17

Exploit prediction scoring system (EPSS) score for CVE-2018-0156

0.51%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 74 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2018-0156

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
7.8
HIGH AV:N/AC:L/Au:N/C:N/I:N/A:C
10.0
6.9
NIST
7.5
HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.9
3.6
NIST

CWE ids for CVE-2018-0156

  • The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
    Assigned by: nvd@nist.gov (Primary)
  • Assigned by: ykramarz@cisco.com (Secondary)

References for CVE-2018-0156

Products affected by CVE-2018-0156

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