Riskcovery

CVE-2025-30646

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

State
Published
Severity
7.1 High
Published
Apr 9, 2025
Updated
Apr 9, 2025
Reserved
Mar 24, 2025

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
4.07.1 HighCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/V:C/RE:Mjuniper
3.16.5 MediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hjuniper

Weaknesses

  • CWE-195 Signed to Unsigned Conversion Error

Affected Products

ProductVersions
Junos OSJuniper Networks
  • before 21.2R3-S9Affected
  • 21.4 to before 21.4R3-S10Affected
  • 22.2 to before 22.2R3-S6Affected
  • 22.4 to before 22.4R3-S6Affected
  • 23.2 to before 23.2R2-S3Affected
  • 23.4 to before 23.4R2-S4Affected
  • 24.2 to before 24.2R2Affected
Junos OS EvolvedJuniper Networks
  • before 21.4R3-S10-EVOAffected
  • 22.2-EVO to before 22.2R3-S6-EVOAffected
  • 22.4-EVO to before 22.4R3-S6-EVOAffected
  • 23.2-EVO to before 23.2R2-S3-EVOAffected
  • 23.4-EVO to before 23.4R2-S4-EVOAffected
  • 24.2-EVO to before 24.2R2-EVOAffected

References

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