PT-2024-28520 · Juniper Networks · Junos Evolved

Published 2024-07-10 · Updated 2026-01-22 · CVE-2024-39538

Positive Technologies (AI Summary)

CVSS v4.0

7.1

High

Base vector

AV:A/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:X/R:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions Junos OS Evolved on ACX7000 Series versions prior to 21.2R3-S8-EVO Junos OS Evolved on ACX7000 Series 21.4-EVO versions prior to 21.4R3-S7-EVO Junos OS Evolved on ACX7000 Series 22.2-EVO versions prior to 22.2R3-S4-EVO Junos OS Evolved on ACX7000 Series 22.3-EVO versions prior to 22.3R3-S3-EVO Junos OS Evolved on ACX7000 Series 22.4-EVO versions prior to 22.4R3-S2-EVO Junos OS Evolved on ACX7000 Series 23.2-EVO versions prior to 23.2R2-EVO Junos OS Evolved on ACX7000 Series 23.4-EVO versions prior to 23.4R1-S2-EVO, 23.4R2-EVO

Description A Buffer Copy without Checking Size of Input issue in the PFE management daemon (evo-pfemand) of Juniper Networks Junos OS Evolved on ACX7000 Series allows an unauthenticated, adjacent attacker to cause a Denial-of-Service (DoS). When multicast traffic with a specific, valid (S,G) is received, evo-pfemand crashes, which leads to an outage of the affected FPC until it is manually recovered.

Recommendations For Junos OS Evolved on ACX7000 Series versions prior to 21.2R3-S8-EVO, update to version 21.2R3-S8-EVO or later. For Junos OS Evolved on ACX7000 Series 21.4-EVO versions prior to 21.4R3-S7-EVO, update to version 21.4R3-S7-EVO or later. For Junos OS Evolved on ACX7000 Series 22.2-EVO versions prior to 22.2R3-S4-EVO, update to version 22.2R3-S4-EVO or later. For Junos OS Evolved on ACX7000 Series 22.3-EVO versions prior to 22.3R3-S3-EVO, update to version 22.3R3-S3-EVO or later. For Junos OS Evolved on ACX7000 Series 22.4-EVO versions prior to 22.4R3-S2-EVO, update to version 22.4R3-S2-EVO or later. For Junos OS Evolved on ACX7000 Series 23.2-EVO versions prior to 23.2R2-EVO, update to version 23.2R2-EVO or later. For Junos OS Evolved on ACX7000 Series 23.4-EVO versions prior to 23.4R1-S2-EVO, 23.4R2-EVO, update to version 23.4R1-S2-EVO or 23.4R2-EVO or later.

Fix

DoS

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

BDU:2025-08768

CVE-2024-39538

Affected Products

Junos Evolved

References · 9

• https://osv.dev/vulnerability/CVE-2024-39538 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-39538 · Security Note
• https://bdu.fstec.ru/vul/2025-08768 · Security Note
• https://supportportal.juniper.net/JSA82998 · Vendor Advisory
• https://t.me/cvedetector/691 · Telegram Post
• https://supportportal.juniper.net/s/article/2024-07-Security-Bulletin-Junos-OS-Evolved-ACX7000-Series-When-multicast-traffic-with-a-specific-S-G-is-received-evo-pfemand-crashes-CVE-2024-39538?language=en_US · Note
• https://t.me/cveNotify/149591 · Telegram Post
• https://twitter.com/VulmonFeeds/status/1811471239149453615 · Twitter Post
• https://twitter.com/CVEnew/status/1811440411518390781 · Twitter Post