PT-2018-2100 · Cisco · Cisco Ios+1

Published 2018-09-26 · Updated 2025-10-30 · CVE-2018-0197

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Cisco IOS Software and Cisco IOS XE Software (affected versions not specified)

Description A vulnerability in the VLAN Trunking Protocol (VTP) subsystem 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 issue is due to a logic error in how the affected software handles a subset of VTP packets. An attacker could exploit this by sending VTP packets in a sequence that triggers a timeout in the VTP message processing code, potentially impacting the ability to create, modify, or delete VLANs.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

RCE

Weakness Enumeration

CWE-20

Related Identifiers

BDU:2019-00051

CVE-2018-0197

Affected Products

Cisco Ios

Cisco Ios Xe

References · 7

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180926-vtp · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2018-0197 · Vendor Advisory
• https://bdu.fstec.ru/vul/2019-00051 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2018-0197 · Security Note
• https://securityfocus.com/bid/105424/info · Note
• http://securityfocus.com/bid/105424 · Note
• https://t.me/cveNotify/141049 · Telegram Post