CVE-2024-21618

Summary

An Access of Memory Location After End of Buffer vulnerability in the Layer-2 Control Protocols Daemon (l2cpd) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent, unauthenticated attacker to cause Denial of Service (DoS).

On all Junos OS and Junos OS Evolved platforms, when LLDP is enabled on a specific interface, and a malformed LLDP packet is received, l2cpd crashes and restarts. The impact of the l2cpd crash is reinitialization of STP protocols (RSTP, MSTP or VSTP), and MVRP and ERP. Also, if any services depend on LLDP state (like PoE or VoIP device recognition), then these will also be affected.

This issue affects:

Junos OS:

  • from 21.4 before 21.4R3-S4, 

  • from 22.1 before 22.1R3-S4, 

  • from 22.2 before 22.2R3-S2, 

  • from 22.3 before 22.3R2-S2, 22.3R3-S1, 

  • from 22.4 before 22.4R3, 

  • from 23.2 before 23.2R2.

Junos OS Evolved:

  • from 21.4-EVO before 21.4R3-S5-EVO, 

  • from 22.1-EVO before 22.1R3-S4-EVO, 

  • from 22.2-EVO before 22.2R3-S2-EVO, 

  • from 22.3-EVO before 22.3R2-S2-EVO, 22.3R3-S1-EVO, 

  • from 22.4-EVO before 22.4R3-EVO, 

  • from 23.2-EVO before 23.2R2-EVO.

This issue does not affect:

  • Junos OS versions prior to 21.4R1;

  • Junos OS Evolved versions prior to 21.4R1-EVO.

Affected Software

VendorProductVersion RangeStatus
Juniper NetworksJunos OS21.4 < 21.4R3-S4affected
Juniper NetworksJunos OS22.1 < 22.1R3-S4affected
Juniper NetworksJunos OS22.2 < 22.2R3-S2affected
Juniper NetworksJunos OS22.3 < 22.3R2-S2, 22.3R3-S1affected
Juniper NetworksJunos OS22.4 < 22.4R3affected
Juniper NetworksJunos OS23.2 < 23.2R2affected
Juniper NetworksJunos OS0 < 21.4R1unaffected
Juniper NetworksJunos OS Evolved21.4-EVO < 21.4R3-S5-EVOaffected
Juniper NetworksJunos OS Evolved22.1-EVO < 22.1R3-S4-EVOaffected
Juniper NetworksJunos OS Evolved22.2-EVO < 22.2R3-S2-EVOaffected
Juniper NetworksJunos OS Evolved22.3-EVO < 22.3R2-S2-EVO, 22.3R3-S1-EVOaffected
Juniper NetworksJunos OS Evolved22.4-EVO < 22.4R3-EVOaffected
Juniper NetworksJunos OS Evolved23.2-EVO < 23.2R2-EVOaffected
Juniper NetworksJunos OS Evolved0 < 21.4R1-EVOunaffected

Weaknesses

  • CWE-788: CWE-788: Access of Memory Location After End of Buffer
  • Denial of Service (DoS)

Workarounds

There are no available workarounds for this issue.

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But if LLDP and its services are not required, customers can disable LLDP.

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References