CVE-2022-20940

Severity Score

5.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A vulnerability in the TLS handler of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to gain access to sensitive information.
This vulnerability is due to improper implementation of countermeasures against a Bleichenbacher attack on a device that uses SSL decryption policies. An attacker could exploit this vulnerability by sending crafted TLS messages to an affected device, which would act as an oracle and allow the attacker to carry out a chosen-ciphertext attack. A successful exploit could allow the attacker to perform cryptanalytic operations that may allow decryption of previously captured TLS sessions to the affected device.

Una vulnerabilidad en el controlador TLS del software Cisco Firepower Threat Defense (FTD) podría permitir que un atacante remoto no autenticado obtenga acceso a información confidencial. Esta vulnerabilidad se debe a la implementación inadecuada de contramedidas contra un ataque Bleichenbacher en un dispositivo que utiliza políticas de descifrado SSL. Un atacante podría aprovechar esta vulnerabilidad enviando mensajes TLS manipulados a un dispositivo afectado, lo que actuaría como un oráculo y permitiría al atacante llevar a cabo un ataque de texto cifrado elegido. Un exploit exitoso podría permitir al atacante realizar operaciones criptoanalíticas que podrían permitir el descifrado de sesiones TLS previamente capturadas en el dispositivo afectado.

*Credits: N/A

CVSS Scores

NISTv3.1 5.3

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-11-02 CVE Reserved
2022-11-10 CVE Published
2024-06-02 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-203: Observable Discrepancy

CAPEC

References (1)

URL	Tag	Source
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-tls-bb-rCgtmY2

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC

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 Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"				>= 6.2.3 <= 6.2.3.18 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.2.3 <= 6.2.3.18"		-		Affected
Cisco Search vendor "Cisco"		Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"				>= 6.3.0 <= 6.3.0.5 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.3.0 <= 6.3.0.5"		-		Affected
Cisco Search vendor "Cisco"		Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"				>= 6.4.0 <= 6.4.0.14 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.4.0 <= 6.4.0.14"		-		Affected
Cisco Search vendor "Cisco"		Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"				>= 6.5.0 <= 6.5.0.5 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.5.0 <= 6.5.0.5"		-		Affected
Cisco Search vendor "Cisco"		Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"				>= 6.7.0 <= 6.7.0.3 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.7.0 <= 6.7.0.3"		-		Affected
Cisco Search vendor "Cisco"		Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"				>= 7.0.0 <= 7.0.3 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 7.0.0 <= 7.0.3"		-		Affected
Cisco Search vendor "Cisco"		Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"				6.6.0 Search vendor "Cisco" for product "Firepower Threat Defense" and version "6.6.0"		-		Affected
Cisco Search vendor "Cisco"		Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"				6.6.0.1 Search vendor "Cisco" for product "Firepower Threat Defense" and version "6.6.0.1"		-		Affected
Cisco Search vendor "Cisco"		Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"				6.6.1 Search vendor "Cisco" for product "Firepower Threat Defense" and version "6.6.1"		-		Affected
Cisco Search vendor "Cisco"		Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"				6.6.3 Search vendor "Cisco" for product "Firepower Threat Defense" and version "6.6.3"		-		Affected
Cisco Search vendor "Cisco"		Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"				6.6.4 Search vendor "Cisco" for product "Firepower Threat Defense" and version "6.6.4"		-		Affected
Cisco Search vendor "Cisco"		Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"				6.6.5 Search vendor "Cisco" for product "Firepower Threat Defense" and version "6.6.5"		-		Affected
Cisco Search vendor "Cisco"		Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"				6.6.5.1 Search vendor "Cisco" for product "Firepower Threat Defense" and version "6.6.5.1"		-		Affected
Cisco Search vendor "Cisco"		Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"				6.6.5.2 Search vendor "Cisco" for product "Firepower Threat Defense" and version "6.6.5.2"		-		Affected
Cisco Search vendor "Cisco"		Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"				7.1.0.0 Search vendor "Cisco" for product "Firepower Threat Defense" and version "7.1.0.0"		-		Affected
Cisco Search vendor "Cisco"		Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"				7.1.0.1 Search vendor "Cisco" for product "Firepower Threat Defense" and version "7.1.0.1"		-		Affected
Cisco Search vendor "Cisco"		Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense"				7.1.0.2 Search vendor "Cisco" for product "Firepower Threat Defense" and version "7.1.0.2"		-		Affected