Vulnerability Details : CVE-2018-0197

A vulnerability in the VLAN Trunking Protocol (VTP) subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to corrupt the internal VTP database on an affected device and cause a denial of service (DoS) condition. The vulnerability is due to a logic error in how the affected software handles a subset of VTP packets. An attacker could exploit this vulnerability by sending VTP packets in a sequence that triggers a timeout in the VTP message processing code of the affected software. A successful exploit could allow the attacker to impact the ability to create, modify, or delete VLANs and cause a DoS condition. There are workarounds that address this vulnerability. This vulnerability affects Cisco devices that are running a vulnerable release of Cisco IOS Software or Cisco IOS XE Software, are operating in VTP client mode or VTP server mode, and do not have a VTP domain name configured. The default configuration for Cisco devices that are running Cisco IOS Software or Cisco IOS XE Software and support VTP is to operate in VTP server mode with no domain name configured.
Published 2018-10-05 14:29:00
Updated 2019-10-09 23:31:26
Source Cisco Systems, Inc.
View at NVD,   CVE.org
Vulnerability category: Input validationDenial of service

Products affected by CVE-2018-0197

Exploit prediction scoring system (EPSS) score for CVE-2018-0197

EPSS FAQ
0.05%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 21 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2018-0197

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
3.3
 LOW AV:A/AC:L/Au:N/C:N/I:N/A:P
6.5
2.9
 NIST
6.5
 MEDIUM CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
2.8
3.6
 NIST

CWE ids for CVE-2018-0197

  • 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)
    • ykramarz@cisco.com (Secondary)

References for CVE-2018-0197

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