6

CVE-2024-39536

Junos OS and Junos OS Evolved: Flaps of BFD sessions with authentication cause a ppmd memory leak

A Missing Release of Memory after Effective Lifetime vulnerability in the Periodic Packet Management Daemon (ppmd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker to cause a 

Denial-of-Service (DoS).


When a BFD session configured with authentication flaps, ppmd memory can leak. Whether the leak happens depends on a race condition which is outside the attackers control. This issue only affects BFD operating in distributed aka delegated (which is the default behavior) or inline mode.



Whether the leak occurs can be monitored with the following CLI command:

> show ppm request-queue


FPC     Pending-request
fpc0                   2
request-total-pending: 2


where a continuously increasing number of pending requests is indicative of the leak. 








This issue affects:

Junos OS:


  *  All versions before 21.2R3-S8,
  *  21.4 versions before 21.4R3-S7,
  *  22.1 versions before 22.1R3-S4,
  *  22.2 versions before 22.2R3-S4, 
  *  22.3 versions before 22.3R3,
  *  22.4 versions before 22.4R2-S2, 22.4R3.



Junos OS Evolved:
  *  All versions before 21.2R3-S8-EVO,
  *  21.4-EVO versions before 21.4R3-S7-EVO,
  *  22.2-EVO versions before 22.2R3-S4-EVO,
  *  22.3-EVO versions before 22.3R3-EVO,
  *  22.4-EVO versions before 22.4R3-EVO.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Juniper ≫ Junos Version < 21.2
Juniper ≫ Junos Version21.4 Update-
Juniper ≫ Junos Version21.4 Updater1
Juniper ≫ Junos Version21.4 Updater1-s1
Juniper ≫ Junos Version21.4 Updater1-s2
Juniper ≫ Junos Version21.4 Updater2
Juniper ≫ Junos Version21.4 Updater2-s1
Juniper ≫ Junos Version21.4 Updater2-s2
Juniper ≫ Junos Version21.4 Updater3
Juniper ≫ Junos Version21.4 Updater3-s1
Juniper ≫ Junos Version21.4 Updater3-s2
Juniper ≫ Junos Version21.4 Updater3-s3
Juniper ≫ Junos Version21.4 Updater3-s4
Juniper ≫ Junos Version21.4 Updater3-s5
Juniper ≫ Junos Version21.4 Updater3-s6
Juniper ≫ Junos Version22.1 Update-
Juniper ≫ Junos Version22.1 Updater1
Juniper ≫ Junos Version22.1 Updater1-s1
Juniper ≫ Junos Version22.1 Updater1-s2
Juniper ≫ Junos Version22.1 Updater2
Juniper ≫ Junos Version22.1 Updater2-s1
Juniper ≫ Junos Version22.1 Updater2-s2
Juniper ≫ Junos Version22.1 Updater3
Juniper ≫ Junos Version22.1 Updater3-s1
Juniper ≫ Junos Version22.1 Updater3-s2
Juniper ≫ Junos Version22.1 Updater3-s3
Juniper ≫ Junos Version22.2 Update-
Juniper ≫ Junos Version22.2 Updater1
Juniper ≫ Junos Version22.2 Updater1-s1
Juniper ≫ Junos Version22.2 Updater1-s2
Juniper ≫ Junos Version22.2 Updater2
Juniper ≫ Junos Version22.2 Updater2-s1
Juniper ≫ Junos Version22.2 Updater2-s2
Juniper ≫ Junos Version22.2 Updater3
Juniper ≫ Junos Version22.2 Updater3-s1
Juniper ≫ Junos Version22.2 Updater3-s2
Juniper ≫ Junos Version22.2 Updater3-s3
Juniper ≫ Junos Version22.3 Update-
Juniper ≫ Junos Version22.3 Updater1
Juniper ≫ Junos Version22.3 Updater1-s1
Juniper ≫ Junos Version22.3 Updater1-s2
Juniper ≫ Junos Version22.3 Updater2
Juniper ≫ Junos Version22.3 Updater2-s1
Juniper ≫ Junos Version22.3 Updater2-s2
Juniper ≫ Junos Version22.4 Update-
Juniper ≫ Junos Version22.4 Updater1
Juniper ≫ Junos Version22.4 Updater1-s1
Juniper ≫ Junos Version22.4 Updater1-s2
Juniper ≫ Junos Version22.4 Updater2
Juniper ≫ Junos Version22.4 Updater2-s1
Juniper ≫ Junos Version22.4 Updater3
Juniper ≫ Junos Os Evolved Version < 21.2
Juniper ≫ Junos Os Evolved Version21.2 Update-
Juniper ≫ Junos Os Evolved Version21.2 Updater1
Juniper ≫ Junos Os Evolved Version21.2 Updater1-s1
Juniper ≫ Junos Os Evolved Version21.2 Updater1-s2
Juniper ≫ Junos Os Evolved Version21.2 Updater2
Juniper ≫ Junos Os Evolved Version21.2 Updater2-s1
Juniper ≫ Junos Os Evolved Version21.2 Updater2-s2
Juniper ≫ Junos Os Evolved Version21.2 Updater3
Juniper ≫ Junos Os Evolved Version21.2 Updater3-s1
Juniper ≫ Junos Os Evolved Version21.2 Updater3-s2
Juniper ≫ Junos Os Evolved Version21.2 Updater3-s3
Juniper ≫ Junos Os Evolved Version21.2 Updater3-s4
Juniper ≫ Junos Os Evolved Version21.2 Updater3-s5
Juniper ≫ Junos Os Evolved Version21.2 Updater3-s6
Juniper ≫ Junos Os Evolved Version21.2 Updater3-s7
Juniper ≫ Junos Os Evolved Version21.4 Update-
Juniper ≫ Junos Os Evolved Version21.4 Updater1
Juniper ≫ Junos Os Evolved Version21.4 Updater1-s1
Juniper ≫ Junos Os Evolved Version21.4 Updater1-s2
Juniper ≫ Junos Os Evolved Version21.4 Updater2
Juniper ≫ Junos Os Evolved Version21.4 Updater2-s1
Juniper ≫ Junos Os Evolved Version21.4 Updater2-s2
Juniper ≫ Junos Os Evolved Version21.4 Updater3
Juniper ≫ Junos Os Evolved Version21.4 Updater3-s1
Juniper ≫ Junos Os Evolved Version21.4 Updater3-s2
Juniper ≫ Junos Os Evolved Version21.4 Updater3-s3
Juniper ≫ Junos Os Evolved Version21.4 Updater3-s4
Juniper ≫ Junos Os Evolved Version21.4 Updater3-s5
Juniper ≫ Junos Os Evolved Version21.4 Updater3-s6
Juniper ≫ Junos Os Evolved Version22.2 Update-
Juniper ≫ Junos Os Evolved Version22.2 Updater1
Juniper ≫ Junos Os Evolved Version22.2 Updater1-s1
Juniper ≫ Junos Os Evolved Version22.2 Updater1-s2
Juniper ≫ Junos Os Evolved Version22.2 Updater2
Juniper ≫ Junos Os Evolved Version22.2 Updater2-s1
Juniper ≫ Junos Os Evolved Version22.2 Updater2-s2
Juniper ≫ Junos Os Evolved Version22.2 Updater3
Juniper ≫ Junos Os Evolved Version22.2 Updater3-s1
Juniper ≫ Junos Os Evolved Version22.2 Updater3-s2
Juniper ≫ Junos Os Evolved Version22.2 Updater3-s3
Juniper ≫ Junos Os Evolved Version22.3 Update-
Juniper ≫ Junos Os Evolved Version22.3 Updater1
Juniper ≫ Junos Os Evolved Version22.3 Updater1-s1
Juniper ≫ Junos Os Evolved Version22.3 Updater1-s2
Juniper ≫ Junos Os Evolved Version22.3 Updater2
Juniper ≫ Junos Os Evolved Version22.3 Updater2-s1
Juniper ≫ Junos Os Evolved Version22.3 Updater2-s2
Juniper ≫ Junos Os Evolved Version22.4 Update-
Juniper ≫ Junos Os Evolved Version22.4 Updater1
Juniper ≫ Junos Os Evolved Version22.4 Updater1-s1
Juniper ≫ Junos Os Evolved Version22.4 Updater1-s2
Juniper ≫ Junos Os Evolved Version22.4 Updater2
Juniper ≫ Junos Os Evolved Version22.4 Updater2-s1
Juniper ≫ Junos Os Evolved Version22.4 Updater2-s2
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EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.15% 0.365
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
sirt@juniper.net 6 0 0
CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
sirt@juniper.net 5.3 1.6 3.6
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-401 Missing Release of Memory after Effective Lifetime

The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory.