Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2024-39536

Severity CVSS v4.0:
MEDIUM
Type:
Unavailable / Other
Publication date:
11/07/2024
Last modified:
22/01/2026

Description

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 <br /> <br /> Denial-of-Service (DoS).<br /> <br /> <br /> 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.<br /> <br /> <br /> <br /> Whether the leak occurs can be monitored with the following CLI command:<br /> <br /> &gt; show ppm request-queue<br /> <br /> <br /> FPC     Pending-request<br /> fpc0                   2<br /> request-total-pending: 2<br /> <br /> <br /> where a continuously increasing number of pending requests is indicative of the leak. <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> This issue affects:<br /> <br /> Junos OS:<br /> <br /> <br /> * All versions before 21.2R3-S8,<br /> * 21.4 versions before 21.4R3-S7,<br /> * 22.1 versions before 22.1R3-S4,<br /> * 22.2 versions before 22.2R3-S4, <br /> * 22.3 versions before 22.3R3,<br /> * 22.4 versions before 22.4R2-S2, 22.4R3.<br /> <br /> <br /> <br /> Junos OS Evolved:<br /> * All versions before 21.2R3-S8-EVO,<br /> * 21.4-EVO versions before 21.4R3-S7-EVO,<br /> * 22.2-EVO versions before 22.2R3-S4-EVO,<br /> * 22.3-EVO versions before 22.3R3-EVO,<br /> * 22.4-EVO versions before 22.4R3-EVO.

Impact

Vector 4.0
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 CVSS v4.0 Severity and Metrics:

Base Score: 6.00 MEDIUM
Vector: 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

Attack Vector (AV): Adjacent
Attack Complexity (AC): Low
Attack Requirements (AT): Present
Privileges Required (PR): None
User Interaction (UI): None
Confidentiality (VC): None
Integrity (VI): None
Availability (VA): High
Confidentiality (SC): None
Integrity (SI): None
Availability (SA): None

Base Score 4.0
6.00
Severity 4.0
MEDIUM
Vector 3.x
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.30 MEDIUM
Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Adjacent
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
5.30
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:* 21.2 (excluding)
cpe:2.3:o:juniper:junos:21.4:-:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:21.4:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:21.4:r1-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:21.4:r1-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:21.4:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:21.4:r2-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:21.4:r2-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:21.4:r3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:21.4:r3-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:21.4:r3-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:21.4:r3-s3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:21.4:r3-s4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:21.4:r3-s5:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:21.4:r3-s6:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools