CVE-2024-30386

Summary

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.

Affected Software

VendorProductVersion RangeStatus
Juniper NetworksJunos OS0 < 20.4R3-S8affected
Juniper NetworksJunos OS21.2 < 21.2R3-S6affected
Juniper NetworksJunos OS21.3 < 21.3R3-S5affected
Juniper NetworksJunos OS21.4 < 21.4R3-S4affected
Juniper NetworksJunos OS22.1 < 22.1R3-S3affected
Juniper NetworksJunos OS22.2 < 22.2R3-S1affected
Juniper NetworksJunos OS22.3 < 22.3R3affected
Juniper NetworksJunos OS22.4 < 22.4R2affected
Juniper NetworksJunos OS Evolved0 < 20.4R3-S8-EVOaffected
Juniper NetworksJunos OS Evolved21.2-EVO < 21.2R3-S6-EVOaffected
Juniper NetworksJunos OS Evolved21.3-EVO < 21.3R3-S5-EVOaffected
Juniper NetworksJunos OS Evolved21.4-EVO < 21.4R3-S4-EVOaffected
Juniper NetworksJunos OS Evolved22.1-EVO < 22.1R3-S3-EVOaffected
Juniper NetworksJunos OS Evolved22.2-EVO < 22.2R3-S1-EVOaffected
Juniper NetworksJunos OS Evolved22.3-EVO < 22.3R3-EVOaffected
Juniper NetworksJunos OS Evolved22.4-EVO < 22.4R2-EVOaffected

Weaknesses

  • CWE-416: CWE-416 Use After Free
  • Denial-of-Service (DoS)

Workarounds

There are no known workarounds for this issue.

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

References