CVE-2023-43650

Non-MFA account takeover via brute-force attack on weak password reset code in jumpserver

Severity Score

7.4

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

JumpServer is an open source bastion host. The verification code for resetting user's password is vulnerable to brute-force attacks due to the absence of rate limiting. JumpServer provides a feature allowing users to reset forgotten passwords. Affected users are sent a 6-digit verification code, ranging from 000000 to 999999, to facilitate the password reset. Although the code is only available in 1 minute, this window potentially allows for up to 1,000,000 validation attempts. This issue has been addressed in versions 2.28.20 and 3.7.1. Users are advised to upgrade. There are no known workarounds for this vulnerability.

JumpServer es un host de bastionado de código abierto. El código de verificación para restablecer la contraseña del usuario es vulnerable a ataques de fuerza bruta debido a la ausencia de rate limiting. JumpServer proporciona una función que permite a los usuarios restablecer contraseñas olvidadas. Los usuarios afectados reciben un código de verificación de 6 dígitos, que va del 000000 al 999999, para facilitar el restablecimiento de la contraseña. Aunque el código sólo está disponible en 1 minuto, esta ventana permite potencialmente hasta 1.000.000 de intentos de validación. Este problema se solucionó en las versiones 2.28.20 y 3.7.1. Se recomienda a los usuarios que actualicen. No se conocen workarounds para esta vulnerabilidad.

*Credits: N/A

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

Low

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2023-09-20 CVE Reserved
2023-09-27 CVE Published
2024-08-02 CVE Updated
2024-08-02 First Exploit
2024-08-27 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-640: Weak Password Recovery Mechanism for Forgotten Password

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC
https://github.com/jumpserver/jumpserver/security/advisories/GHSA-mwx4-8fwc-2xvw	2024-08-02

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
Fit2cloud Search vendor "Fit2cloud"		Jumpserver Search vendor "Fit2cloud" for product "Jumpserver"				>= 2.0.0 < 2.28.20 Search vendor "Fit2cloud" for product "Jumpserver" and version " >= 2.0.0 < 2.28.20"		-		Affected
Fit2cloud Search vendor "Fit2cloud"		Jumpserver Search vendor "Fit2cloud" for product "Jumpserver"				>= 3.0.0 < 3.7.1 Search vendor "Fit2cloud" for product "Jumpserver" and version " >= 3.0.0 < 3.7.1"		-		Affected