Cisco ASA/Firepower Threat Defense/IOS/IOS XE IPv6 DHCP Client denial of service

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.1$0-$5k0.00

Summaryinfo

A vulnerability was found in Cisco ASA, Firepower Threat Defense, IOS and IOS XE. It has been classified as problematic. Affected by this issue is some unknown functionality of the component IPv6 DHCP Client. The manipulation leads to denial of service. This vulnerability is uniquely identified as CVE-2023-20081. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Cisco ASA, Firepower Threat Defense, IOS and IOS XE (Firewall Software) (unknown version). This issue affects an unknown code block of the component IPv6 DHCP Client. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability.

The weakness was disclosed 03/23/2023 as cisco-sa-asaftdios-dhcpv6-cli-Zf3zTv. The advisory is shared at sec.cloudapps.cisco.com. The identification of this vulnerability is CVE-2023-20081 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-2023-24260). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 6.1

VulDB Base Score: 5.9
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.9
NVD Vector: 🔍

CNA Base Score: 6.8
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-asaftdios-dhcpv6-cli-Zf3zTv
Status: Confirmed

CVE: CVE-2023-20081 (🔍)
GCVE (CVE): GCVE-0-2023-20081
GCVE (VulDB): GCVE-100-223697
EUVD: 🔍
scip Labs: https://www.scip.ch/en/?labs.20150108

Entryinfo

Created: 03/23/2023 18:04
Updated: 08/21/2025 23:17
Changes: 03/23/2023 18:04 (39), 04/13/2023 13:24 (1), 04/13/2023 13:30 (21), 07/28/2023 11:42 (1), 08/21/2025 23:17 (16)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

 Anonymous User (+0)
3 years ago
Good morning,
Could you use the official NVD Nist cpe "cisco:adaptive_security_appliance" instead of "cisco:asa"?
I would really appreciate!

Best Regards,
TEAM CERT
 VulDB Community Team3 years ago
Thank you, we have just aligned the CPE.

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