Medium [CVE-2025-59969] 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
This medium-severity Juniper Networks advisory covers CVE-2025-59969 affecting Junos OS Evolved, Junos OS, Junos.
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Summary
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,
- 22.2-EVO version before 22.2R3-S7-EVO,
- * All versions before 22
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- 22.4R3-S8-EVO
- 23.2R2-S5-EVO
- 23.4R2-EVO
- 24.2R2-EVO
- 24.4R2-EVO
- 22.2R3-S7-EVO
- 22.4R3-S7-EVO
- 23.2R2-S4-EVO
- 23.4R2-S5-EVO
- 24.2R2-S1-EVO
- 24.4R1-S3-EVO
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation
Upgrade to a fixed release: 22.4R3-S8-EVO, 23.2R2-S5-EVO, 23.4R2-EVO, 24.2R2-EVO, 24.4R2-EVO, 22.2R3-S7-EVO. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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