Cisco Firepower Threat Defense Software 7.2.0/7.2.0.1 TLS denial of service

Summaryinfo

A vulnerability marked as problematic has been reported in Cisco Firepower Threat Defense Software 7.2.0/7.2.0.1. Affected by this vulnerability is an unknown functionality of the component TLS Handler. This manipulation causes denial of service. This vulnerability is registered as CVE-2023-20070. Remote exploitation of the attack is possible. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Cisco Firepower Threat Defense Software 7.2.0/7.2.0.1 (Firewall Software) and classified as problematic. Affected by this vulnerability is an unknown code of the component TLS Handler. 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 summary by CVE is:

A vulnerability in the TLS 1.3 implementation of the Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the Snort 3 detection engine to unexpectedly restart. This vulnerability is due to a logic error in how memory allocations are handled during a TLS 1.3 session. Under specific, time-based constraints, an attacker could exploit this vulnerability by sending a crafted TLS 1.3 message sequence through an affected device. A successful exploit could allow the attacker to cause the Snort 3 detection engine to reload, resulting in a denial of service (DoS) condition. While the Snort detection engine reloads, packets going through the FTD device that are sent to the Snort detection engine will be dropped. The Snort detection engine will restart automatically. No manual intervention is required.

The weakness was published 11/01/2023 as cisco-sa-ftd-snort3-uAnUntcV. It is possible to read the advisory at sec.cloudapps.cisco.com. This vulnerability is known as CVE-2023-20070 since 10/27/2022. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Upgrading eliminates this vulnerability.

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Productinfo

Type

• Firewall Software

Vendor

• Cisco

Name

• Firepower Threat Defense Software

Version

• 7.2.0
• 7.2.0.1

License

• commercial

Website

• Vendor: https://www.cisco.com/

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