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CVE-2023-20187

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CVE-2023-20187

Published: Sep 27, 2023

Modified: Aug 2, 2024

PUBLISHED

CVSS v3.1

8.6

HIGH

Description

A vulnerability in the Multicast Leaf Recycle Elimination (mLRE) feature of Cisco IOS XE Software for Cisco ASR 1000 Series Aggregation Services Routers could allow an unauthenticated, remote attacker to cause the affected device to reload, resulting in a denial of service (DoS) condition. This vulnerability is due to incorrect handling of certain IPv6 multicast packets when they are fanned out more than seven times on an affected device. An attacker could exploit this vulnerability by sending a specific IPv6 multicast or IPv6 multicast VPN (MVPNv6) packet through the affected device. A successful exploit could allow the attacker to cause a reload of the affected device, resulting in a DoS condition.

VendorProductVersions

Cisco

Cisco IOS XE Software

affected
3.7.1S
affected
3.7.2S
affected
3.7.3S
affected
3.7.4S
affected
3.7.5S

+198 more versions

Weaknesses (CWE)

CWE-823

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

References

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