VDB-240720 · CVE-2023-20187 · GCVE-0-2023-20187

Cisco IOS XE on ASR 1000 IPv6 Multicast denial of service

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7.8	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Cisco IOS XE on ASR 1000 and classified as critical. The impacted element is an unknown function of the component IPv6 Multicast Handler. The manipulation results in denial of service. This vulnerability is known as CVE-2023-20187. It is possible to launch the attack remotely. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco IOS XE on ASR 1000 (Router Operating System) (the affected version is unknown). It has been classified as critical. Affected is an unknown code of the component IPv6 Multicast Handler. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. CVE summarizes:

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.

The weakness was published 09/27/2023 as cisco-sa-mlre-H93FswRz. The advisory is shared for download at sec.cloudapps.cisco.com. This vulnerability is traded as CVE-2023-20187 since 10/27/2022. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

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Productinfo

Type

Router Operating System

Vendor

Cisco

Name

IOS XE

License

commercial

Website

Vendor: https://www.cisco.com/

CPE 2.3info

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CPE 2.2info

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CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.9
VulDB Meta Temp Score: 7.8

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 8.6
CNA Vector (Cisco Systems, Inc.): 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/27/2022 🔍
09/27/2023 +335 days 🔍
09/27/2023 +0 days 🔍
10/21/2023 +24 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-mlre-H93FswRz
Status: Confirmed

CVE: CVE-2023-20187 (🔍)
GCVE (CVE): GCVE-0-2023-20187
GCVE (VulDB): GCVE-100-240720
scip Labs: https://www.scip.ch/en/?labs.20150108

Entryinfo

Created: 09/27/2023 21:51
Updated: 10/21/2023 08:57
Changes: 09/27/2023 21:51 (51), 10/21/2023 08:57 (11)
Complete: 🔍
Cache ID: 216::103