Improper handling of exceptional conditions in Junos OS Evolved and Juniper Junos OS

1) Improper handling of exceptional conditions

EUVDB-ID: #VU108104

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-30652

CWE-ID: CWE-755 - Improper Handling of Exceptional Conditions

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper handling of exceptional conditions error in routing protocol daemon (rpd). A local user can cause a Denial of Service (DoS).

When asregex-optimized is configured and a specific "show route as-path" CLI command is executed, the rpd crashes and restarts.

Repeated execution of this command will cause a sustained DoS condition.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Junos OS Evolved: before 21.2R3-S9-EVO, 21.4R3-S10-EVO, 22.2R3-S6-EVO, 22.4R3-S6-EVO, 23.2R2-S3-EVO, 23.4R2-S4-EVO, 24.2R2-EVO, 24.4R1-EVO

Juniper Junos OS: before 21.2R3-S9, 21.4R3-S10, 22.2R3-S6, 22.4R3-S6, 23.2R2-S3, 23.4R2-S4, 24.2R2, 24.4R1

CPE2.3

• cpe:2.3:o:juniper_networks:junos_os_evolved:*:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:juniper_junos_os:*:*:*:*:*:*:*:*

External links

https://supportportal.juniper.net/s/article/2025-04-Security-Bulletin-Junos-OS-and-Junos-OS-Evolved-Executing-a-specific-CLI-command-when-asregex-optimized-is-configured-causes-an-RPD-crash-CVE-2025-30652

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.