Cisco IOS/IOS XE IPv6 DHCP Relay denial of service

CVSS Meta Temp Score
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CTI Interest Score
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7.8$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Cisco IOS and IOS XE. This affects an unknown function of the component IPv6 DHCP Relay. This manipulation causes denial of service. This vulnerability appears as CVE-2023-20080. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco IOS and IOS XE (Router Operating System) (affected version unknown). It has been declared as critical. Affected by this vulnerability is an unknown functionality of the component IPv6 DHCP Relay. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability.

The weakness was presented 03/23/2023 as cisco-sa-ios-dhcpv6-dos-44cMvdDK. The advisory is shared at sec.cloudapps.cisco.com. This vulnerability is known as CVE-2023-20080 since 10/27/2022. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-24259). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

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

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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 🔍
03/23/2023 +147 days 🔍
03/23/2023 +0 days 🔍
08/21/2025 +882 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-ios-dhcpv6-dos-44cMvdDK
Status: Confirmed

CVE: CVE-2023-20080 (🔍)
GCVE (CVE): GCVE-0-2023-20080
GCVE (VulDB): GCVE-100-223693
EUVD: 🔍
scip Labs: https://www.scip.ch/en/?labs.20150108

Entryinfo

Created: 03/23/2023 18:01
Updated: 08/21/2025 19:55
Changes: 03/23/2023 18:01 (39), 04/13/2023 12:28 (1), 04/13/2023 12:36 (21), 08/21/2025 19:55 (16)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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