2025-07 Security Bulletin: Junos OS and Junos OS Evolved: When route validation is enabled, route validation cache connection establishment leads to an rpd crash (CVE-2025-52958)

Product Affected

This issue affects Junos OS and Junos OS Evolved

Severity

Medium

Severity Assessment (CVSS) Score

CVSS: v3.1: 5.3 (CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVSS: v4.0: 6 (CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/R:A/RE:M/U:Green)

Problem

A Reachable Assertion vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent, unauthenticated attacker to cause a Denial of Service (DoS).

On all Junos OS and Junos OS Evolved devices, when route validation is enabled, a rare condition during route validation cache connection establishment can lead to an rpd crash, which impacts BGP session establishment. This occurs specifically when the connection request fails during an error-handling scenario.

Continued session establishment failures lead to a sustained DoS condition.

This issue affects Junos OS:

All versions before 22.2R3-S6,
from 22.4 before 22.4R3-S6,
from 23.2 before 23.2R2-S3,
from 23.4 before 23.4R2-S4,
from 24.2 before 24.2R2;

Junos OS Evolved:

All versions before 22.2R3-S6-EVO,
from 22.4 before 22.4R3-S6-EVO,
from 23.2 before 23.2R2-S3-EVO,
from 23.4 before 23.4R2-S4-EVO,
from 24.2 before 24.2R2-EVO.

Solution

The following software releases have been updated to resolve this specific issue:

Junos OS Evolved: 22.2R3-S6-EVO, 22.4R3-S6-EVO, 23.2R2-S3-EVO, 23.4R2-S4-EVO, 24.2R2-EVO, 24.4R1-EVO, and all subsequent releases.

Junos OS: 22.2R3-S6, 22.4R3-S6, 23.2R2-S3, 23.4R2-S4, 24.2R2, 24.4R1, and all subsequent releases.

This issue is being tracked as 1851205 which is visible on the Customer Support website.

Note: Juniper SIRT's policy is not to evaluate releases which are beyond End of Engineering (EOE) or End of Life (EOL).

Workaround

There are no known workarounds for this issue.

Severity Assessment

Information for how Juniper Networks uses CVSS can be found at KB 16446 [juniper.net] "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."

Modification History

2025-07-09: Initial Publication