CVE-2024-39536

published 2024-07-11

CVE-2024-39536: A Missing Release of Memory after Effective Lifetime vulnerability in the Periodic Packet Management Daemon (ppmd) of Juniper Networks Junos OS and Junos OS…

medium 6 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

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.

Affected

25 ranges

Vendor	Product	Version range	Fixed in
juniper	junos	< 21.2	21.2
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos_os	—	—
juniper	junos_os_evolved	< 21.2	21.2
juniper	junos_os_evolved	—	—
juniper	junos_os_evolved	—	—
juniper	junos_os_evolved	—	—
juniper	junos_os_evolved	—	—
juniper	junos_os_evolved	—	—
juniper_networks	junos_os	< 21.2R3-S8	21.2R3-S8
juniper_networks	junos_os	>= 21.4 < 21.4R3-S7	21.4R3-S7
juniper_networks	junos_os	>= 22.1 < 22.1R3-S4	22.1R3-S4
juniper_networks	junos_os	>= 22.2 < 22.2R3-S4	22.2R3-S4
juniper_networks	junos_os	>= 22.3 < 22.3R3	22.3R3
juniper_networks	junos_os	>= 22.4 < 22.4R2-S2, 22.4R3	22.4R2-S2, 22.4R3
juniper_networks	junos_os_evolved	>= 21.2-EVO < 21.2R3-S8-EVO	21.2R3-S8-EVO
juniper_networks	junos_os_evolved	>= 21.4-EVO < 21.4R3-S7-EVO	21.4R3-S7-EVO
juniper_networks	junos_os_evolved	>= 22.2-EVO < 22.2R3-S4-EVO	22.2R3-S4-EVO
juniper_networks	junos_os_evolved	>= 22.3-EVO < 22.3R3-EVO	22.3R3-EVO
juniper_networks	junos_os_evolved	>= 22.4-EVO < 22.4R3-EVO	22.4R3-EVO
juniper_networks	junos_os_evolved	>= 23.2-EVO < 23.2R1-EVO	23.2R1-EVO

CWE-401