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

CVE-2024-30386

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

Description

A Use-After-Free vulnerability in the Layer 2 Address Learning Daemon (l2ald)

of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker to cause l2ald to crash leading to a Denial-of-Service (DoS).

In an EVPN-VXLAN scenario, when

state updates are received and processed by the affected system, the correct order of some processing steps is not ensured, which can lead to an l2ald crash and restart. Whether the crash occurs depends on system internal timing which is outside the attackers control.
This issue affects:

Junos OS: 

  • All versions before 20.4R3-S8,
  • 21.2 versions before 21.2R3-S6,
  • 21.3 versions before 21.3R3-S5,
  • 21.4 versions before 21.4R3-S4,
  • 22.1 versions before 22.1R3-S3,
  • 22.2 versions before 22.2R3-S1,
  • 22.3 versions before 22.3R3,,
  • 22.4 versions before 22.4R2;

Junos OS Evolved: 

  • All versions before 20.4R3-S8-EVO,
  • 21.2-EVO versions before 21.2R3-S6-EVO, 
  • 21.3-EVO

versions before 21.3R3-S5-EVO,

  • 21.4-EVO

versions before 21.4R3-S4-EVO,

  • 22.1-EVO

versions before 22.1R3-S3-EVO,

  • 22.2-EVO

versions before 22.2R3-S1-EVO,

  • 22.3-EVO

versions before 22.3R3-EVO,

  • 22.4-EVO

versions before 22.4R2-EVO.

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CVSS V3 Severity and Metrics
Base Score:
5.3 Medium
Impact Score:
3.6
Exploitability Score:
1.6
Vector:
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector (AV):
Adjacent_network
Attack Complexity (AC):
High
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