CVE-2024-39557

Summary

An Uncontrolled Resource Consumption vulnerability in the

Layer 2 Address Learning Daemon (l2ald)

of Juniper Networks Junos OS Evolved allows an unauthenticated, adjacent attacker to cause a memory leak, eventually exhausting all system memory, leading to a system crash and Denial of Service (DoS).

Certain MAC table updates cause a small amount of memory to leak.  Once memory utilization reaches its limit, the issue will result in a system crash and restart.

To identify the issue, execute the CLI command:

user@device> show platform application-info allocations app l2ald-agent EVL Object Allocation Statistics:

Node   Application     Context Name                               Live   Allocs   Fails     Guids re0   l2ald-agent               net::juniper::rtnh::L2Rtinfo       1069096 1069302   0         1069302 re0   l2ald-agent               net::juniper::rtnh::NHOpaqueTlv     114     195       0         195

This issue affects Junos OS Evolved:

  • All versions before 21.4R3-S8-EVO,

  • from 22.2-EVO before 22.2R3-S4-EVO,

  • from 22.3-EVO before 22.3R3-S3-EVO,

  • from 22.4-EVO before 22.4R3-EVO,

  • from 23.2-EVO before 23.2R2-EVO.

Affected Software

VendorProductVersion RangeStatus
Juniper NetworksJunos OS Evolved0 < 21.4R3-S8-EVOaffected
Juniper NetworksJunos OS Evolved22.2-EVO < 22.2R3-S4-EVOaffected
Juniper NetworksJunos OS Evolved22.3-EVO < 22.3R3-S3-EVOaffected
Juniper NetworksJunos OS Evolved22.4-EVO < 22.4R3-EVOaffected
Juniper NetworksJunos OS Evolved23.2-EVO < 23.2R2-EVOaffected

Weaknesses

  • CWE-400: CWE-400 Uncontrolled Resource Consumption

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