CVE-2023-28984

Summary

A Use After Free vulnerability in the Layer 2 Address Learning Manager (l2alm) of Juniper Networks Junos OS on QFX Series allows an adjacent attacker to cause the Packet Forwarding Engine to crash and restart, leading to a Denial of Service (DoS). The PFE may crash when a lot of MAC learning and aging happens, but due to a Race Condition (Concurrent Execution using Shared Resource with Improper Synchronization) that is outside the attackers direct control. This issue affects: Juniper Networks Junos OS versions prior to 19.4R3-S10 on QFX Series; 20.2 versions prior to 20.2R3-S7 on QFX Series; 20.3 versions prior to 20.3R3-S6 on QFX Series; 20.4 versions prior to 20.4R3-S5 on QFX Series; 21.1 versions prior to 21.1R3-S4 on QFX Series; 21.2 versions prior to 21.2R3-S3 on QFX Series; 21.3 versions prior to 21.3R3-S3 on QFX Series; 21.4 versions prior to 21.4R3 on QFX Series; 22.1 versions prior to 22.1R3 on QFX Series; 22.2 versions prior to 22.2R2 on QFX Series.

Affected Software

VendorProductVersion RangeStatus
Juniper NetworksJunos OSunspecified < 19.4R3-S10affected
Juniper NetworksJunos OS20.2 < 20.2R3-S7affected
Juniper NetworksJunos OS20.3 < 20.3R3-S6affected
Juniper NetworksJunos OS20.4 < 20.4R3-S5affected
Juniper NetworksJunos OS21.1 < 21.1R3-S4affected
Juniper NetworksJunos OS21.2 < 21.2R3-S3affected
Juniper NetworksJunos OS21.3 < 21.3R3-S3affected
Juniper NetworksJunos OS21.4 < 21.4R3affected
Juniper NetworksJunos OS22.1 < 22.1R3affected
Juniper NetworksJunos OS22.2 < 22.2R2affected

Weaknesses

  • CWE-362: CWE-362 Race Condition (Concurrent Execution using Shared Resource with Improper Synchronization)
  • Denial of Service (DoS)
  • CWE-416: CWE-416 Use After Free

Workarounds

There are no known workarounds for this issue.

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

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

References