#VU107437 Buffer access with incorrect length value in Juniper Junos OS - CVE-2025-21591

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Main Vulnerability Database Vulnerabilities #VU107437

#VU107437 Buffer access with incorrect length value in Juniper Junos OS - CVE-2025-21591

Published: April 14, 2025


Vulnerability identifier: #VU107437
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-21591
CWE-ID:
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Juniper Junos OS
Software vendor:
Juniper Networks, Inc.

Description

The vulnerability allows a remote non-authenticated attacker to a crash the entire system.

The vulnerability exists due to buffer access with incorrect length value error in the jdhcpd daemon. A remote non-authenticated attacker can send a DHCP packet with a malformed DHCP option to cause jdhcp to crash creating a Denial of Service (DoS) condition.


Remediation

Install updates from vendor's website.

External links