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CVE-2023-20031

Publication date 1 November 2023

Last updated 24 July 2024


Ubuntu priority

Cvss 3 Severity Score

5.4 · Medium

Score breakdown

A vulnerability in the SSL/TLS certificate handling of Snort 3 Detection Engine integration with Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the Snort 3 detection engine to restart. This vulnerability is due to a logic error that occurs when an SSL/TLS certificate that is under load is accessed when it is initiating an SSL connection. Under specific, time-based constraints, an attacker could exploit this vulnerability by sending a high rate of SSL/TLS connection requests to be inspected by the Snort 3 detection engine on an affected device. A successful exploit could allow the attacker to cause the Snort 3 detection engine to reload, resulting in either a bypass or a denial of service (DoS) condition, depending on device configuration. The Snort detection engine will restart automatically. No manual intervention is required.

Read the notes from the security team

Status

Package Ubuntu Release Status
snort 24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar Ignored end of life, was needs-triage
22.04 LTS jammy
Not affected
20.04 LTS focal
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected

Notes


yomonokio

The vulnerability affected Cisco FTD Software

Severity score breakdown

Parameter Value
Base score 5.4 · Medium
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Scope Changed
Confidentiality None
Integrity impact Low
Availability impact Low
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:L