CVE-2019-1741

Cisco IOS XE Software Encrypted Traffic Analytics Denial of Service Vulnerability

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Attend

*SSVC

Descriptions

A vulnerability in the Cisco Encrypted Traffic Analytics (ETA) feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to a logic error that exists when handling a malformed incoming packet, leading to access to an internal data structure after it has been freed. An attacker could exploit this vulnerability by sending crafted, malformed IP packets to an affected device. A successful exploit could allow the attacker to cause an affected device to reload, resulting in a DoS condition.

Una vulnerabilidad en la característica ETA (Cisco Encrypted Traffic Analytics) del software Cisco IOS XE podría permitir que un atacante remoto sin autenticar provoque una denegación de servicio (DoS). La vulnerabilidad se debe a un error de lógica que existe al manejar un paquete entrante mal formado, lo que conduce al acceso a la estructura interna de datos una vez se ha liberado. Un atacante podría explotar esta vulnerabilidad enviando paquetes IP manipulados y mal formados a un dispositivo afectado. Si se explota con éxito, podría permitir que el atacante consiga que el dispositivo afectado se reinicie, provocando una denegación de servicio.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* 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
2019-03-27 CVE Published
2024-08-17 EPSS Updated
2024-11-19 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation
CWE-416: Use After Free

CAPEC

References (2)

URL	Tag	Source
http://www.securityfocus.com/bid/107614	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190327-eta-dos	2020-10-08

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"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				3.2.0ja Search vendor "Cisco" for product "Ios Xe" and version "3.2.0ja"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.6.1 Search vendor "Cisco" for product "Ios Xe" and version "16.6.1"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.6.2 Search vendor "Cisco" for product "Ios Xe" and version "16.6.2"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.6.3 Search vendor "Cisco" for product "Ios Xe" and version "16.6.3"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.7.1 Search vendor "Cisco" for product "Ios Xe" and version "16.7.1"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.7.1a Search vendor "Cisco" for product "Ios Xe" and version "16.7.1a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.7.1b Search vendor "Cisco" for product "Ios Xe" and version "16.7.1b"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.8.1 Search vendor "Cisco" for product "Ios Xe" and version "16.8.1"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.8.1a Search vendor "Cisco" for product "Ios Xe" and version "16.8.1a"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.8.1b Search vendor "Cisco" for product "Ios Xe" and version "16.8.1b"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.8.1c Search vendor "Cisco" for product "Ios Xe" and version "16.8.1c"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.8.1d Search vendor "Cisco" for product "Ios Xe" and version "16.8.1d"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.8.1e Search vendor "Cisco" for product "Ios Xe" and version "16.8.1e"		-		Affected
Cisco Search vendor "Cisco"		Ios Xe Search vendor "Cisco" for product "Ios Xe"				16.8.1s Search vendor "Cisco" for product "Ios Xe" and version "16.8.1s"		-		Affected