PT-2025-29235 · Juniper Networks · Junos+1

Published 2025-07-09 · Updated 2025-07-11 · CVE-2025-52946

Positive Technologies (AI Summary)

CVSS v4.0

8.7

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:A/V:C/RE:M/U:X

Name of the Vulnerable Software and Affected Versions: Juniper Networks Junos OS versions prior to 21.2R3-S9 Juniper Networks Junos OS version 21.4 Juniper Networks Junos OS versions 22.2 through 22.2R3-S6 Juniper Networks Junos OS versions 22.4 through 22.4R3-S5 Juniper Networks Junos OS versions 23.2 through 23.2R2-S3 Juniper Networks Junos OS versions 23.4 through 23.4R2-S4 Juniper Networks Junos OS versions 24.2 through 24.2R2 Juniper Networks Junos OS Evolved versions prior to 22.4R3-S5-EVO Juniper Networks Junos OS Evolved versions 23.2-EVO through 23.2R2-S3-EVO Juniper Networks Junos OS Evolved versions 23.4-EVO through 23.4R2-S4-EVO Juniper Networks Junos OS Evolved versions 24.2-EVO through 24.2R2-EVO

Description: A Use After Free vulnerability exists in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved. An attacker can exploit this by sending a BGP update with a specifically malformed AS PATH, causing the rpd process to crash and leading to a Denial of Service (DoS). Continuous sending of the malformed AS PATH attribute can result in a sustained DoS condition. The vulnerability requires an established BGP session and only affects systems with BGP traceoptions enabled.

Recommendations: Update to Junos OS version 21.2R3-S9 or later. Update to Junos OS version 22.2R3-S6 or later. Update to Junos OS version 22.4R3-S5 or later. Update to Junos OS version 23.2R2-S3 or later. Update to Junos OS version 23.4R2-S4 or later. Update to Junos OS version 24.2R2 or later. Update to Junos OS Evolved version 22.4R3-S5-EVO or later. Update to Junos OS Evolved version 23.2R2-S3-EVO or later. Update to Junos OS Evolved version 23.4R2-S4-EVO or later. Update to Junos OS Evolved version 24.2R2-EVO or later.

Fix

DoS

Use After Free

Weakness Enumeration

CWE-130

CWE-416

Related Identifiers

BDU:2025-08761

BDU:2025-08764

CVE-2025-52946

Affected Products

Junos

Junos Evolved

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2025-52946 · Security Note
• https://supportportal.juniper.net/JSA100050 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-08764 · Security Note
• https://osv.dev/vulnerability/CVE-2025-52946 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-08761 · Security Note
• https://supportportal.juniper.net/s/article/2025-07-Security-Bulletin-Junos-OS-and-Junos-OS-Evolved-With-traceoptions-enabled-receipt-of-malformed-AS-PATH-causes-RPD-crash-CVE-2025-52946?language=en_US · Note
• https://twitter.com/CVEnew/status/1943700218567958857 · Twitter Post
• https://twitter.com/VulmonFeeds/status/1943730263659340148 · Twitter Post