CVE-2019-1833

Cisco Firepower Threat Defense Software SSL/TLS Policy Bypass Vulnerability

Severity Score

5.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A vulnerability in the Secure Sockets Layer (SSL)/Transport Layer Security (TLS) protocol parser of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass configured policies. The vulnerability is due to improper parsing of specific attributes in a TLS packet header. An attacker could exploit this vulnerability by sending malicious TLS messages to the affected system. A successful exploit could allow the attacker to bypass the configured policies for the system, which could allow traffic to flow through without being inspected.

Una vulnerabilidad en Secure Sockets Layer (SSL)/Transport Layer Security (TLS) protocol parser of Cisco Firepower Threat Defense (FTD) Software, podría permitir a un atacante remoto no autorizado omitir las políticas configuradas. La vulnerabilidad es debido a un análisis incorrecto de atributos específicos en un encabezado de paquete TLS. Un atacante podría explotar esta vulnerabilidad enviando mensajes TLS maliciosos al sistema afectado. Una explotación exito podría permitir al atacante eludir las políticas configuradas para el sistema, lo que podría permitir que el tráfico fluya sin ser inspeccionado.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2018-12-06 CVE Reserved
2019-05-16 CVE Published
2023-03-07 EPSS Updated
2024-09-16 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-693: Protection Mechanism Failure

CAPEC

References (2)

URL	Tag	Source
http://www.securityfocus.com/bid/108338	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-ftd-ssltls-bypass	2019-10-09

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Cisco Search vendor "Cisco"		Firepower Management Center Search vendor "Cisco" for product "Firepower Management Center"				6.1.0 Search vendor "Cisco" for product "Firepower Management Center" and version "6.1.0"		-		Affected
Cisco Search vendor "Cisco"		Firepower Management Center Search vendor "Cisco" for product "Firepower Management Center"				6.2.0 Search vendor "Cisco" for product "Firepower Management Center" and version "6.2.0"		-		Affected
Cisco Search vendor "Cisco"		Firepower Management Center Search vendor "Cisco" for product "Firepower Management Center"				6.2.1 Search vendor "Cisco" for product "Firepower Management Center" and version "6.2.1"		-		Affected
Cisco Search vendor "Cisco"		Firepower Management Center Search vendor "Cisco" for product "Firepower Management Center"				6.2.2 Search vendor "Cisco" for product "Firepower Management Center" and version "6.2.2"		-		Affected
Cisco Search vendor "Cisco"		Firepower Management Center Search vendor "Cisco" for product "Firepower Management Center"				6.2.3 Search vendor "Cisco" for product "Firepower Management Center" and version "6.2.3"		-		Affected