Cisco ASA/Firepower Threat Defense SSL/TLS 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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7.8$0-$5k0.00

Summaryinfo

A vulnerability was found in Cisco ASA and Firepower Threat Defense. It has been declared as problematic. Affected is an unknown function of the component SSL/TLS. Executing a manipulation can lead to denial of service. This vulnerability is handled as CVE-2023-20006. The attack can be executed remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Cisco ASA and Firepower Threat Defense (Firewall Software) (version now known). This vulnerability affects some unknown processing of the component SSL/TLS. 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. CVE summarizes:

A vulnerability in the hardware-based SSL/TLS cryptography functionality of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software for Cisco Firepower 2100 Series Appliances could allow an unauthenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to an implementation error within the cryptographic functions for SSL/TLS traffic processing when they are offloaded to the hardware. An attacker could exploit this vulnerability by sending a crafted stream of SSL/TLS traffic to an affected device. A successful exploit could allow the attacker to cause an unexpected error in the hardware-based cryptography engine, which could cause the device to reload.

The weakness was released 06/08/2023 as cisco-sa-asaftd-ssl-dos-uu7mV5p6. The advisory is shared for download at sec.cloudapps.cisco.com. This vulnerability was named CVE-2023-20006 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.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-24185). Once again VulDB remains the best source for 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: 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 🔍
06/08/2023 +224 days 🔍
06/08/2023 +0 days 🔍
08/13/2026 +1162 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-asaftd-ssl-dos-uu7mV5p6
Status: Confirmed

CVE: CVE-2023-20006 (🔍)
GCVE (CVE): GCVE-0-2023-20006
GCVE (VulDB): GCVE-100-231076
EUVD: 🔍

Entryinfo

Created: 06/08/2023 09:32
Updated: 08/13/2026 11:04
Changes: 06/08/2023 09:32 (40), 06/08/2023 12:21 (1), 07/07/2023 09:09 (1), 07/07/2023 09:12 (12), 07/28/2023 11:42 (1), 08/15/2025 05:17 (16), 08/13/2026 11:04 (14)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

Discussion

 Saeed.Sobhy (+0)
3 years ago
update vdb for ftd
 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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