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MEDIUM · 6.5

CVE-2025-59969

A Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in the advanced forwarding toolkit (evo-aftmand/evo-pfemand) of Juniper Networks Junos OS Evolved on PTX Series o...

Vulnerability Description

A Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in the advanced forwarding toolkit (evo-aftmand/evo-pfemand) of Juniper Networks Junos OS Evolved on PTX Series or QFX5000 Series allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS).An attacker sending crafted multicast packets will cause line cards running evo-aftmand/evo-pfemand to crash and restart or non-line card devices to crash and restart. Continued receipt and processing of these packets will sustain the Denial of Service (DoS) condition. This issue affects Junos OS Evolved PTX Series: * All versions before 22.4R3-S8-EVO, * from 23.2 before 23.2R2-S5-EVO, * from 23.4 before 23.4R2-EVO, * from 24.2 before 24.2R2-EVO, * from 24.4 before 24.4R2-EVO. This issue affects Junos OS Evolved on QFX5000 Series: * 22.2-EVO version before 22.2R3-S7-EVO, * 22.4-EVO version before 22.4R3-S7-EVO, * 23.2-EVO versions before 23.2R2-S4-EVO, * 23.4-EVO versions before 23.4R2-S5-EVO, * 24.2-EVO versions before 24.2R2-S1-EVO, * 24.4-EVO versions before 24.4R1-S3-EVO, 24.4R2-EVO. This issue does not affect Junos OS Evolved on QFX5000 Series versions before: 21.2R2-S1-EVO, 21.2R3-EVO, 21.3R2-EVO, 21.4R1-EVO, and 22.1R1-EVO.

CVSS Score

6.5

MEDIUM

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH

Affected Products

VendorProductVersions
JuniperJunos Os Evolved< 22.4
JuniperPtx10001-36Mr-
JuniperPtx10002-36Qdd-
JuniperPtx10003-
JuniperPtx10004-
JuniperPtx10008-
JuniperPtx10016-
JuniperPtx12008-
JuniperQfx5110-
JuniperQfx5120-
JuniperQfx5130-
JuniperQfx5200-
JuniperQfx5210-
JuniperQfx5220-
JuniperQfx5230-64Cd-
JuniperQfx5240-
JuniperQfx5241-
JuniperQfx5700-

Related Weaknesses (CWE)

CWE-120

References

FAQ

What is CVE-2025-59969?

CVE-2025-59969 is a vulnerability with a CVSS score of 6.5 (MEDIUM). A Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in the advanced forwarding toolkit (evo-aftmand/evo-pfemand) of Juniper Networks Junos OS Evolved on PTX Series o...

How severe is CVE-2025-59969?

CVE-2025-59969 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-59969?

Check the references section above for vendor advisories and patch information. Affected products include: Juniper Junos Os Evolved, Juniper Ptx10001-36Mr, Juniper Ptx10002-36Qdd, Juniper Ptx10003, Juniper Ptx10004.