CVE-2019-12647 HIGH

CVE-2019-12647: Cisco IOS and IOS XE Software IP Ident Denial of Service Vulnerability

Vendor Cisco
Product Cisco IOS
Weakness CWE-476
Published September 25, 2019
Last update November 19, 2024

CVSS base score

8.6/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

What the vulnerability does

01Description

A vulnerability in the Ident protocol handler of Cisco IOS and IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload. The vulnerability exists because the affected software incorrectly handles memory structures, leading to a NULL pointer dereference. An attacker could exploit this vulnerability by opening a TCP connection to specific ports and sending traffic over that connection. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a denial of service (DoS) condition.

Key dates

02Disclosure timeline

September 25, 2019 CVE published
November 19, 2024 Record updated

Related vulnerabilities

04Related CVE