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

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CVE-2024-30386

Severity CVSS v4.0:
HIGH
Type:
CWE-416 Use After Free
Publication date:
12/04/2024
Last modified:
06/02/2025

Description

A Use-After-Free vulnerability in the Layer 2 Address Learning Daemon (l2ald)<br /> <br /> of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker to cause l2ald to crash leading to a Denial-of-Service (DoS).<br /> <br /> In an EVPN-VXLAN scenario, when <br /> <br /> state updates are received and processed by the affected system, the correct order of some processing steps is not ensured, which can lead to an l2ald crash and restart. Whether the crash occurs depends on system internal timing which is outside the attackers control.<br /> This issue affects:<br /> <br /> Junos OS: <br /> <br /> <br /> <br /> * All versions before 20.4R3-S8,<br /> * 21.2 versions before 21.2R3-S6,<br /> * 21.3 versions before 21.3R3-S5,<br /> * 21.4 versions before 21.4R3-S4,<br /> * 22.1 versions before 22.1R3-S3,<br /> * 22.2 versions before 22.2R3-S1,<br /> * 22.3 versions before 22.3R3,,<br /> * 22.4 versions before 22.4R2;<br /> <br /> <br /> <br /> <br /> Junos OS Evolved: <br /> <br /> <br /> <br /> * All versions before 20.4R3-S8-EVO,<br /> * 21.2-EVO versions before 21.2R3-S6-EVO, <br /> * 21.3-EVO<br /> <br /> versions before 21.3R3-S5-EVO,<br /> * 21.4-EVO<br /> <br /> versions before 21.4R3-S4-EVO,<br /> * 22.1-EVO<br /> <br /> versions before 22.1R3-S3-EVO,<br /> * 22.2-EVO<br /> <br /> versions before 22.2R3-S1-EVO,<br /> * 22.3-EVO<br /> <br /> versions before 22.3R3-EVO,<br /> * 22.4-EVO<br /> <br /> versions before 22.4R2-EVO.

Impact

Vector 4.0
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L CVSS v4.0 Severity and Metrics:

Base Score: 7.10 HIGH
Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L

Attack Vector (AV): Adjacent
Attack Complexity (AC): Low
Attack Requirements (AT): None
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): Low

Base Score 4.0
7.10
Severity 4.0
HIGH
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:*:*:*:*:*:*:*:* 20.4 (excluding)
cpe:2.3:o:juniper:junos:20.4:-:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.4:r1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.4:r1-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.4:r2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.4:r2-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.4:r2-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.4:r3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.4:r3-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.4:r3-s2:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.4:r3-s3:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.4:r3-s4:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.4:r3-s5:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.4:r3-s6:*:*:*:*:*:*
cpe:2.3:o:juniper:junos:20.4:r3-s7:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools