CVE-2019-1715

Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Low-Entropy Keys Vulnerability

Severity Score

7.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Attend

*SSVC

Descriptions

A vulnerability in the Deterministic Random Bit Generator (DRBG), also known as Pseudorandom Number Generator (PRNG), used in Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a cryptographic collision, enabling the attacker to discover the private key of an affected device. The vulnerability is due to insufficient entropy in the DRBG when generating cryptographic keys. An attacker could exploit this vulnerability by generating a large number of cryptographic keys on an affected device and looking for collisions with target devices. A successful exploit could allow the attacker to impersonate an affected target device or to decrypt traffic secured by an affected key that is sent to or from an affected target device.

Una vulnerabilidad en el Deterministic Random Bit Generator (DRBG), conocido como Pseudorandom Number Generator (PRNG), utilizado en los programas Adaptive Security Appliance (ASA) y Firepower Threat Defense (FTD) de Cisco, podría permitir que un atacante remoto no identificado genere una colisión criptográfica, que permite al atacante descubrir la clave privada de un dispositivo afectado. La vulnerabilidad se debe a una entropía insuficiente en la DRBG al generar claves criptográficas. Un atacante podría atacar esta vulnerabilidad al generar una gran cantidad de claves criptográficas en un dispositivo afectado y provocar colisiones con los dispositivos de destino. Una operación exito podría permitir al atacante hacerse pasar por un dispositivo de destino afectado o descifrar el tráfico protegido por una clave afectada que se envía desde un dispositivo de destino afectado.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:Attend

Exploitation

None

Automatable

Yes

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2018-12-06 CVE Reserved
2019-05-03 CVE Published
2023-03-07 EPSS Updated
2024-11-19 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-332: Insufficient Entropy in PRNG

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-asa-ftd-entropy	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"	Adaptive Security Appliance Device Manager Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager"	>= 9.8 < 9.8.4 Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager" and version " >= 9.8 < 9.8.4"	-	Affected	in	Cisco Search vendor "Cisco"	Asa-5506-x Search vendor "Cisco" for product "Asa-5506-x"	-	-	Safe
Cisco Search vendor "Cisco"	Adaptive Security Appliance Device Manager Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager"	>= 9.8 < 9.8.4 Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager" and version " >= 9.8 < 9.8.4"	-	Affected	in	Cisco Search vendor "Cisco"	Asa-5506h-x Search vendor "Cisco" for product "Asa-5506h-x"	-	-	Safe
Cisco Search vendor "Cisco"	Adaptive Security Appliance Device Manager Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager"	>= 9.8 < 9.8.4 Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager" and version " >= 9.8 < 9.8.4"	-	Affected	in	Cisco Search vendor "Cisco"	Asa-5506w-x Search vendor "Cisco" for product "Asa-5506w-x"	-	-	Safe
Cisco Search vendor "Cisco"	Adaptive Security Appliance Device Manager Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager"	>= 9.8 < 9.8.4 Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager" and version " >= 9.8 < 9.8.4"	-	Affected	in	Cisco Search vendor "Cisco"	Asa-5508-x Search vendor "Cisco" for product "Asa-5508-x"	-	-	Safe
Cisco Search vendor "Cisco"	Adaptive Security Appliance Device Manager Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager"	>= 9.8 < 9.8.4 Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager" and version " >= 9.8 < 9.8.4"	-	Affected	in	Cisco Search vendor "Cisco"	Asa-5516-x Search vendor "Cisco" for product "Asa-5516-x"	-	-	Safe
Cisco Search vendor "Cisco"	Adaptive Security Appliance Device Manager Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager"	>= 9.8 < 9.8.4 Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager" and version " >= 9.8 < 9.8.4"	-	Affected	in	Cisco Search vendor "Cisco"	Asa-5525-x Search vendor "Cisco" for product "Asa-5525-x"	-	-	Safe
Cisco Search vendor "Cisco"	Adaptive Security Appliance Device Manager Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager"	>= 9.8 < 9.8.4 Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager" and version " >= 9.8 < 9.8.4"	-	Affected	in	Cisco Search vendor "Cisco"	Asa-5545-x Search vendor "Cisco" for product "Asa-5545-x"	-	-	Safe
Cisco Search vendor "Cisco"	Adaptive Security Appliance Device Manager Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager"	>= 9.8 < 9.8.4 Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager" and version " >= 9.8 < 9.8.4"	-	Affected	in	Cisco Search vendor "Cisco"	Asa-5555-x Search vendor "Cisco" for product "Asa-5555-x"	-	-	Safe
Cisco Search vendor "Cisco"	Adaptive Security Appliance Device Manager Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager"	>= 9.8 < 9.8.4 Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager" and version " >= 9.8 < 9.8.4"	-	Affected	in	Cisco Search vendor "Cisco"	Asa 5500 Search vendor "Cisco" for product "Asa 5500"	-	-	Safe
Cisco Search vendor "Cisco"	Adaptive Security Appliance Device Manager Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager"	>= 9.9 < 9.9.2.50 Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager" and version " >= 9.9 < 9.9.2.50"	-	Affected	in	Cisco Search vendor "Cisco"	Asa-5506-x Search vendor "Cisco" for product "Asa-5506-x"	-	-	Safe
Cisco Search vendor "Cisco"	Adaptive Security Appliance Device Manager Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager"	>= 9.9 < 9.9.2.50 Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager" and version " >= 9.9 < 9.9.2.50"	-	Affected	in	Cisco Search vendor "Cisco"	Asa-5506h-x Search vendor "Cisco" for product "Asa-5506h-x"	-	-	Safe
Cisco Search vendor "Cisco"	Adaptive Security Appliance Device Manager Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager"	>= 9.9 < 9.9.2.50 Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager" and version " >= 9.9 < 9.9.2.50"	-	Affected	in	Cisco Search vendor "Cisco"	Asa-5506w-x Search vendor "Cisco" for product "Asa-5506w-x"	-	-	Safe
Cisco Search vendor "Cisco"	Adaptive Security Appliance Device Manager Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager"	>= 9.9 < 9.9.2.50 Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager" and version " >= 9.9 < 9.9.2.50"	-	Affected	in	Cisco Search vendor "Cisco"	Asa-5508-x Search vendor "Cisco" for product "Asa-5508-x"	-	-	Safe
Cisco Search vendor "Cisco"	Adaptive Security Appliance Device Manager Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager"	>= 9.9 < 9.9.2.50 Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager" and version " >= 9.9 < 9.9.2.50"	-	Affected	in	Cisco Search vendor "Cisco"	Asa-5516-x Search vendor "Cisco" for product "Asa-5516-x"	-	-	Safe
Cisco Search vendor "Cisco"	Adaptive Security Appliance Device Manager Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager"	>= 9.9 < 9.9.2.50 Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager" and version " >= 9.9 < 9.9.2.50"	-	Affected	in	Cisco Search vendor "Cisco"	Asa-5525-x Search vendor "Cisco" for product "Asa-5525-x"	-	-	Safe
Cisco Search vendor "Cisco"	Adaptive Security Appliance Device Manager Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager"	>= 9.9 < 9.9.2.50 Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager" and version " >= 9.9 < 9.9.2.50"	-	Affected	in	Cisco Search vendor "Cisco"	Asa-5545-x Search vendor "Cisco" for product "Asa-5545-x"	-	-	Safe
Cisco Search vendor "Cisco"	Adaptive Security Appliance Device Manager Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager"	>= 9.9 < 9.9.2.50 Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager" and version " >= 9.9 < 9.9.2.50"	-	Affected	in	Cisco Search vendor "Cisco"	Asa-5555-x Search vendor "Cisco" for product "Asa-5555-x"	-	-	Safe
Cisco Search vendor "Cisco"	Adaptive Security Appliance Device Manager Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager"	>= 9.9 < 9.9.2.50 Search vendor "Cisco" for product "Adaptive Security Appliance Device Manager" and version " >= 9.9 < 9.9.2.50"	-	Affected	in	Cisco Search vendor "Cisco"	Asa 5500 Search vendor "Cisco" for product "Asa 5500"	-	-	Safe
Cisco Search vendor "Cisco"	Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"	>= 6.2.1 < 6.2.3.12 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.2.1 < 6.2.3.12"	-	Affected	in	Cisco Search vendor "Cisco"	Asa-5506-x Search vendor "Cisco" for product "Asa-5506-x"	-	-	Safe
Cisco Search vendor "Cisco"	Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"	>= 6.2.1 < 6.2.3.12 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.2.1 < 6.2.3.12"	-	Affected	in	Cisco Search vendor "Cisco"	Asa-5506h-x Search vendor "Cisco" for product "Asa-5506h-x"	-	-	Safe
Cisco Search vendor "Cisco"	Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"	>= 6.2.1 < 6.2.3.12 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.2.1 < 6.2.3.12"	-	Affected	in	Cisco Search vendor "Cisco"	Asa-5506w-x Search vendor "Cisco" for product "Asa-5506w-x"	-	-	Safe
Cisco Search vendor "Cisco"	Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"	>= 6.2.1 < 6.2.3.12 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.2.1 < 6.2.3.12"	-	Affected	in	Cisco Search vendor "Cisco"	Asa-5508-x Search vendor "Cisco" for product "Asa-5508-x"	-	-	Safe
Cisco Search vendor "Cisco"	Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"	>= 6.2.1 < 6.2.3.12 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.2.1 < 6.2.3.12"	-	Affected	in	Cisco Search vendor "Cisco"	Asa-5516-x Search vendor "Cisco" for product "Asa-5516-x"	-	-	Safe
Cisco Search vendor "Cisco"	Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"	>= 6.2.1 < 6.2.3.12 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.2.1 < 6.2.3.12"	-	Affected	in	Cisco Search vendor "Cisco"	Asa-5525-x Search vendor "Cisco" for product "Asa-5525-x"	-	-	Safe
Cisco Search vendor "Cisco"	Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"	>= 6.2.1 < 6.2.3.12 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.2.1 < 6.2.3.12"	-	Affected	in	Cisco Search vendor "Cisco"	Asa-5545-x Search vendor "Cisco" for product "Asa-5545-x"	-	-	Safe
Cisco Search vendor "Cisco"	Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"	>= 6.2.1 < 6.2.3.12 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.2.1 < 6.2.3.12"	-	Affected	in	Cisco Search vendor "Cisco"	Asa-5555-x Search vendor "Cisco" for product "Asa-5555-x"	-	-	Safe
Cisco Search vendor "Cisco"	Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"	>= 6.2.1 < 6.2.3.12 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.2.1 < 6.2.3.12"	-	Affected	in	Cisco Search vendor "Cisco"	Asa 5500 Search vendor "Cisco" for product "Asa 5500"	-	-	Safe
Cisco Search vendor "Cisco"	Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"	>= 6.3.0 < 6.3.0.3 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.3.0 < 6.3.0.3"	-	Affected	in	Cisco Search vendor "Cisco"	Asa-5506-x Search vendor "Cisco" for product "Asa-5506-x"	-	-	Safe
Cisco Search vendor "Cisco"	Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"	>= 6.3.0 < 6.3.0.3 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.3.0 < 6.3.0.3"	-	Affected	in	Cisco Search vendor "Cisco"	Asa-5506h-x Search vendor "Cisco" for product "Asa-5506h-x"	-	-	Safe
Cisco Search vendor "Cisco"	Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"	>= 6.3.0 < 6.3.0.3 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.3.0 < 6.3.0.3"	-	Affected	in	Cisco Search vendor "Cisco"	Asa-5506w-x Search vendor "Cisco" for product "Asa-5506w-x"	-	-	Safe
Cisco Search vendor "Cisco"	Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"	>= 6.3.0 < 6.3.0.3 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.3.0 < 6.3.0.3"	-	Affected	in	Cisco Search vendor "Cisco"	Asa-5508-x Search vendor "Cisco" for product "Asa-5508-x"	-	-	Safe
Cisco Search vendor "Cisco"	Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"	>= 6.3.0 < 6.3.0.3 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.3.0 < 6.3.0.3"	-	Affected	in	Cisco Search vendor "Cisco"	Asa-5516-x Search vendor "Cisco" for product "Asa-5516-x"	-	-	Safe
Cisco Search vendor "Cisco"	Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"	>= 6.3.0 < 6.3.0.3 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.3.0 < 6.3.0.3"	-	Affected	in	Cisco Search vendor "Cisco"	Asa-5525-x Search vendor "Cisco" for product "Asa-5525-x"	-	-	Safe
Cisco Search vendor "Cisco"	Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"	>= 6.3.0 < 6.3.0.3 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.3.0 < 6.3.0.3"	-	Affected	in	Cisco Search vendor "Cisco"	Asa-5545-x Search vendor "Cisco" for product "Asa-5545-x"	-	-	Safe
Cisco Search vendor "Cisco"	Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"	>= 6.3.0 < 6.3.0.3 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.3.0 < 6.3.0.3"	-	Affected	in	Cisco Search vendor "Cisco"	Asa-5555-x Search vendor "Cisco" for product "Asa-5555-x"	-	-	Safe
Cisco Search vendor "Cisco"	Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"	>= 6.3.0 < 6.3.0.3 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.3.0 < 6.3.0.3"	-	Affected	in	Cisco Search vendor "Cisco"	Asa 5500 Search vendor "Cisco" for product "Asa 5500"	-	-	Safe