Summaryinfo

A vulnerability has been found in Cisco IOS and IOS XE and classified as problematic. Affected by this vulnerability is an unknown functionality of the component IPv6 Handler. The manipulation as part of IPv6 Packet leads to input validation. This vulnerability is known as CVE-2018-0467. The attack can be launched remotely. There is no exploit available. It is recommended to upgrade the affected component. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Cisco IOS and IOS XE (Router Operating System) (affected version unknown). Affected is an unknown functionality of the component IPv6 Handler. The manipulation as part of a IPv6 Packet leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. 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. This is going to have an impact on availability. CVE summarizes:

A vulnerability in the IPv6 processing code of Cisco IOS and IOS XE Software could allow an unauthenticated, remote attacker to cause the device to reload. The vulnerability is due to incorrect handling of specific IPv6 hop-by-hop options. An attacker could exploit this vulnerability by sending a malicious IPv6 packet to or through the affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a denial of service (DoS) condition on an affected device.

The bug was discovered 09/26/2018. The weakness was published 10/05/2018 as cisco-sa-20180926-ipv6hbh as confirmed advisory (Website). The advisory is shared for download at tools.cisco.com. This vulnerability is traded as CVE-2018-0467 since 11/26/2017. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 117949 (Cisco IOS Software IPv6 Hop-by-Hop DoS Vulnerability (cisco-sa-20180926-ipv6hbh)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CISCO and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 316327 (Cisco IOS and IOS XE Software IPv6 Hop-by-Hop Options Denial of Service Vulnerability(cisco-sa-20180926-ipv6hbh)).

Upgrading eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (117949). Similar entry is available at VDB-124859. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Router Operating System

Vendor

• Cisco

Name

• IOS
• IOS XE

License

• commercial

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