Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2023-20187

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
27/09/2023
Last modified:
25/01/2024

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. <br /> <br /> 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.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
7.50
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:cisco:ios_xe:3.7.1s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7.2s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7.2ts:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7.3s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7.4s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7.5s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7.6s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.7.7s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.8.0s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.8.1s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.8.2s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.9.0s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.9.1s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.9.2s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.10.0s:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools