CVE-2025-21591

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-21591
A Buffer Access with Incorrect Length Value vulnerability in the jdhcpd daemon of Juniper Networks Junos OS, when DHCP snooping is enabled, allows an unauthenticated, adjacent, attacker to send a DHCP packet with a malformed DHCP option to cause jdhcp to crash creating a Denial of Service (DoS) condition. Continuous receipt of these DHCP packets using the malformed DHCP Option will create a sustained Denial of Service (DoS) condition. This issue affects Junos OS: * from 23.1 before 23.2R2-S3, * from 23.4 before 23.4R2-S3, * from 24.2 before 24.2R2. This issue isn't applicable to any versions of Junos OS before 23.1R1. This issue doesn't affect vSRX Series which doesn't support DHCP Snooping. This issue doesn't affect Junos OS Evolved. There are no indicators of compromise for this issue.

7.4 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 4.0

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope CHANGED

References
Link Resource
https://supportportal.juniper.net/JSA96448
Configurations

No configuration.

History

28 Apr 2025, 17:15

Type Values Removed Values Added
Summary (en) A Buffer Access with Incorrect Length Value vulnerability in the jdhcpd daemon of Juniper Networks Junos OS, when DHCP snooping is enabled, allows an unauthenticated, adjacent, attacker to send a DHCP packet with a malformed DHCP option to cause jdhcp to crash creating a Denial of Service (DoS) condition. Continuous receipt of these DHCP packets using the malformed DHCP Option will create a sustained Denial of Service (DoS) condition. This issue affects Junos OS: * from 23.1R1 before 23.2R2-S3, * from 23.4 before 23.4R2-S3, * from 24.2 before 24.2R2. This issue isn't applicable to any versions of Junos OS before 23.1R1. This issue doesn't affect vSRX Series which doesn't support DHCP Snooping. This issue doesn't affect Junos OS Evolved. There are no indicators of compromise for this issue. (en) A Buffer Access with Incorrect Length Value vulnerability in the jdhcpd daemon of Juniper Networks Junos OS, when DHCP snooping is enabled, allows an unauthenticated, adjacent, attacker to send a DHCP packet with a malformed DHCP option to cause jdhcp to crash creating a Denial of Service (DoS) condition. Continuous receipt of these DHCP packets using the malformed DHCP Option will create a sustained Denial of Service (DoS) condition. This issue affects Junos OS: * from 23.1 before 23.2R2-S3, * from 23.4 before 23.4R2-S3, * from 24.2 before 24.2R2. This issue isn't applicable to any versions of Junos OS before 23.1R1. This issue doesn't affect vSRX Series which doesn't support DHCP Snooping. This issue doesn't affect Junos OS Evolved. There are no indicators of compromise for this issue.

11 Apr 2025, 15:40

Type Values Removed Values Added
Summary
  • (es) Una vulnerabilidad de acceso al búfer con valor de longitud incorrecto en el demonio jdhcpd de Juniper Networks Junos OS, cuando la vigilancia DHCP está habilitada, permite que un atacante adyacente no autenticado envíe un paquete DHCP con una opción DHCP mal formada para provocar el bloqueo de jdhcp, creando una condición de denegación de servicio (DoS). La recepción continua de estos paquetes DHCP mediante la opción DHCP mal formada creará una condición de denegación de servicio (DoS) sostenida. Este problema afecta a Junos OS: * de 23.1R1 a 23.2R2-S3, * de 23.4 a 23.4R2-S3, * de 24.2 a 24.2R2. Este problema no afecta a ninguna versión de Junos OS anterior a 23.1R1. Este problema no afecta a la serie vSRX, que no admite la vigilancia DHCP. Este problema no afecta a Junos OS Evolved. No hay indicadores de compromiso para este problema.

09 Apr 2025, 20:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-04-09 20:15

Updated : 2025-04-28 17:15

NVD link : CVE-2025-21591

Mitre link : CVE-2025-21591

CVE.ORG link : CVE-2025-21591

JSON object : View

Products Affected

No product.

CWE
CWE-805

Buffer Access with Incorrect Length Value