CVE-2024-21611

Summary

A Missing Release of Memory after Effective Lifetime vulnerability in the Routing Protocol Daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS).

In a Juniper Flow Monitoring (jflow) scenario route churn that causes BGP next hops to be updated will cause a slow memory leak and eventually a crash and restart of rpd.

Thread level memory utilization for the areas where the leak occurs can be checked using the below command:

user@host> show task memory detail | match so_in so_in6 28 32 344450 11022400 344760 11032320 so_in 8 16 1841629 29466064 1841734 29467744 This issue affects:

Junos OS

  • 21.4 versions earlier than 21.4R3;
  • 22.1 versions earlier than 22.1R3;
  • 22.2 versions earlier than 22.2R3.

Junos OS Evolved

  • 21.4-EVO versions earlier than 21.4R3-EVO;
  • 22.1-EVO versions earlier than 22.1R3-EVO;
  • 22.2-EVO versions earlier than 22.2R3-EVO.

This issue does not affect:

Juniper Networks Junos OS versions earlier than 21.4R1.

Juniper Networks Junos OS Evolved versions earlier than 21.4R1.

Affected Software

VendorProductVersion RangeStatus
Juniper NetworksJunos OS21.4 < 21.4R3affected
Juniper NetworksJunos OS22.1 < 22.1R3affected
Juniper NetworksJunos OS22.2 < 22.2R3affected
Juniper NetworksJunos OS Evolved21.4-EVO < 21.4R3-EVOaffected
Juniper NetworksJunos OS Evolved22.1-EVO < 22.1R3-EVOaffected
Juniper NetworksJunos OS Evolved22.2-EVO < 22.2R3-EVOaffected

Weaknesses

  • CWE-401: CWE-401 Missing Release of Memory after Effective Lifetime
  • Denial of Service (DoS)

Workarounds

Although not a workaround, it is advised to monitor the memory utilization proactively and when it reaches 85% of total RE memory, restart rpd or reboot the system.

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

References