Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
None
Attack Vector
Adjacent_network
0

CVE-2024-21618

Disclosure Date: April 12, 2024
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

Description

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.

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CVSS V3 Severity and Metrics
Base Score:
6.5 Medium
Impact Score:
3.6
Exploitability Score:
2.8
Vector:
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector (AV):
Adjacent_network
Attack Complexity (AC):
Low
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
None
Integrity (I):
None
Availability (A):
High

General Information

Vendors

  • Juniper Networks

Products

  • Junos OS,
  • Junos OS Evolved

Additional Info

Technical Analysis