Main Vulnerability Database Vulnerabilities #VU102521

#VU102521 Improper control of a resource through its lifetime in Juniper Junos OS and Junos OS Evolved - CVE-2025-21593

Published: January 10, 2025

Vulnerability identifier: #VU102521

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-2025-21593

CWE-ID: CWE-664

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerable software:
Juniper Junos OS
Junos OS Evolved

Software vendor:
Juniper Networks, Inc.

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to an improper control of a resource through its lifetime in the routing protocol daemon (rpd). A remote attacker can send a malformed BGP UPDATE packet to the affected device and perform a denial of service attack.

The vulnerability affects iBGP and eBGP, and both IPv4 and IPv6 protocols.

Remediation

Install updates from vendor's website.

External links

https://supportportal.juniper.net/s/article/2025-01-Security-Bulletin-Junos-OS-and-Junos-OS-Evolved-On-SRv6-enabled-devices-an-attacker-sending-a-malformed-BGP-update-can-cause-the-rpd-to-crash-CVE-2025-21593