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Unrated severityNVD Advisory· Published Apr 9, 2025· Updated Apr 9, 2025

Junos OS and Junos OS Evolved: Receipt of a malformed LLDP TLV results in l2cpd crash

CVE-2025-30646

Description

A Signed to Unsigned Conversion Error vulnerability in the Layer 2 Control Protocol daemon (l2cpd) of Juniper Networks Junos OS and Juniper Networks Junos OS Evolved allows an unauthenticated adjacent attacker sending a specifically malformed LLDP TLV to cause the l2cpd process to crash and restart, causing a Denial of Service (DoS).  Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition.

When an LLDP telemetry subscription is active, receipt of a specifically malformed LLDP TLV causes the l2cpd process to crash and restart.

This issue affects:

Junos OS:

  • All versions before 21.2R3-S9,
  • from 21.4 before 21.4R3-S10,
  • from 22.2 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 21.4R3-S10-EVO,
  • from 22.2-EVO before 22.2R3-S6-EVO,
  • from 22.4-EVO before 22.4R3-S6-EVO,
  • from 23.2-EVO before 23.2R2-S3-EVO,
  • from 23.4-EVO before 23.4R2-S4-EVO,
  • from 24.2-EVO before 24.2R2-EVO.

Affected products

3
  • Juniper Networks/Junos OS Evolvedllm-fuzzy2 versions
    <21.4R3-S10-EVO, >=22.2-EVO <22.2R3-S6-EVO, >=22.4-EVO <22.4R3-S6-EVO, >=23.2-EVO <23.2R2-S3-EVO, >=23.4-EVO <23.4R2-S4-EVO, >=24.2-EVO <24.2R2-EVO+ 1 more
    • (no CPE)range: <21.4R3-S10-EVO, >=22.2-EVO <22.2R3-S6-EVO, >=22.4-EVO <22.4R3-S6-EVO, >=23.2-EVO <23.2R2-S3-EVO, >=23.4-EVO <23.4R2-S4-EVO, >=24.2-EVO <24.2R2-EVO
    • (no CPE)range: 0
  • Juniper Networks/Junosllm-fuzzy
    Range: <21.2R3-S9, >=21.4 <21.4R3-S10, >=22.2 <22.2R3-S6, >=22.4 <22.4R3-S6, >=23.2 <23.2R2-S3, >=23.4 <23.4R2-S4, >=24.2 <24.2R2

Patches

Vulnerability mechanics

References

1

News mentions

0

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