Cisco ASA/Firepower Threat Defense Software Remote Access VPN resource consumption

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

Summaryinfo

A vulnerability was found in Cisco ASA and Firepower Threat Defense Software. It has been classified as critical. Impacted is an unknown function of the component Remote Access VPN. This manipulation causes resource consumption. The identification of this vulnerability is CVE-2023-20095. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Cisco ASA and Firepower Threat Defense Software (Firewall Software) (unknown version). It has been declared as critical. Affected by this vulnerability is an unknown code block of the component Remote Access VPN. The manipulation with an unknown input leads to a resource consumption vulnerability. The CWE definition for the vulnerability is CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. As an impact it is known to affect availability. The summary by CVE is:

A vulnerability in the remote access VPN feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper handling of HTTPS requests. An attacker could exploit this vulnerability by sending crafted HTTPS requests to an affected system. A successful exploit could allow the attacker to cause resource exhaustion, resulting in a DoS condition.

The weakness was shared 11/01/2023 as cisco-sa-asa-webvpn-dos-3GhZQBAS. The advisory is shared at sec.cloudapps.cisco.com. This vulnerability is known as CVE-2023-20095 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.

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: 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: Resource consumption
CWE: CWE-400 / 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 🔍
11/01/2023 +370 days 🔍
11/01/2023 +0 days 🔍
11/29/2023 +28 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-asa-webvpn-dos-3GhZQBAS
Status: Confirmed

CVE: CVE-2023-20095 (🔍)
GCVE (CVE): GCVE-0-2023-20095
GCVE (VulDB): GCVE-100-244249

Entryinfo

Created: 11/01/2023 19:19
Updated: 11/29/2023 16:06
Changes: 11/01/2023 19:19 (49), 11/29/2023 16:06 (12)
Complete: 🔍
Cache ID: 216::103

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