CVE-2021-0262

Junos OS: QFX10002-60C: Use after free vulnerability found during static code analysis

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Through routine static code analysis of the Juniper Networks Junos OS software codebase, the Secure Development Life Cycle team identified a Use After Free vulnerability in PFE packet processing on the QFX10002-60C switching platform. Exploitation of this vulnerability may allow a logically adjacent attacker to trigger a Denial of Service (DoS). Continued exploitation of this vulnerability will sustain the Denial of Service (DoS) condition. This issue only affects QFX10002-60C devices. No other product or platform is vulnerable to this issue. This issue affects Juniper Networks Junos OS on QFX10002-60C: 19.1 version 19.1R3-S1 and later versions; 19.1 versions prior to 19.1R3-S3; 19.2 version 19.2R2 and later versions; 19.2 versions prior to 19.2R3-S1; 20.2 versions prior to 20.2R1-S2. This issue does not affect Juniper Networks Junos OS: versions prior to 19.1R3; 19.2 versions prior to 19.2R2; any version of 19.3; version 20.2R2 and later releases.

A través del análisis de código estático de rutina de la base de código del software de Juniper Networks Junos OS, el equipo Secure Development Life Cycle identificó una vulnerabilidad Uso de la Memoria Previamente Liberada en el procesamiento de paquetes PFE en la plataforma de switching QFX10002-60C. La explotación de esta vulnerabilidad puede permitir a un atacante lógicamente adyacente activar una Denegación de Servicio (DoS). Una explotación continua de esta vulnerabilidad mantendrá la condición de Denegación de Servicio (DoS). Este problema solo afecta a los dispositivos QFX10002-60C. Ningún otro producto o plataforma es vulnerable a este problema. Este problema afecta a Juniper Networks Junos OS en QFX10002-60C: versiones 19.1 19.1R3-S1 y versiones posteriores; versiones 19.1 anteriores a 19.1R3-S3; versiones 19.2, 19.2R2 y versiones posteriores; versiones 19.2 anteriores a 19.2R3-S1; versiones 20.2 anteriores a 20.2R1-S2. Este problema no afecta al sistema operativo Junos de Juniper Networks: versiones anteriores a 19.1R3; versiones 19.2 anteriores a 19.2R2; cualquier versión de 19.3; versión 20.2R2 y versiones posteriores

*Credits: N/A

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Adjacent

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-10-27 CVE Reserved
2021-04-22 CVE Published
2024-01-06 EPSS Updated
2024-09-17 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-416: Use After Free

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://kb.juniper.net/JSA11153	2021-05-04

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				19.1 Search vendor "Juniper" for product "Junos" and version "19.1"		r3-s1		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				19.1 Search vendor "Juniper" for product "Junos" and version "19.1"		r3-s2		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				19.2 Search vendor "Juniper" for product "Junos" and version "19.2"		r2		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				19.2 Search vendor "Juniper" for product "Junos" and version "19.2"		r2-s1		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				19.2 Search vendor "Juniper" for product "Junos" and version "19.2"		r3		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				20.2 Search vendor "Juniper" for product "Junos" and version "20.2"		r1		Affected
Juniper Search vendor "Juniper"		Junos Search vendor "Juniper" for product "Junos"				20.2 Search vendor "Juniper" for product "Junos" and version "20.2"		r1-s1		Affected