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

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CVE-2024-39559

Severity CVSS v4.0:
HIGH
Type:
Unavailable / Other
Publication date:
10/07/2024
Last modified:
07/02/2025

Description

An Improper Check for Unusual or Exceptional Conditions vulnerability in packet processing of Juniper Networks Junos OS Evolved may allow a network-based unauthenticated attacker to crash the device (vmcore) by sending a specific TCP packet over an established TCP session with MD5 authentication enabled, destined to an accessible port on the device, resulting in a Denial of Service (DoS).  The receipt of this packet must occur within a specific timing window outside the attacker&amp;#39;s control (i.e., race condition).<br /> <br /> Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition.<br /> <br /> This issue only affects dual RE systems with Nonstop Active Routing (NSR) enabled.<br /> Exploitation can only occur over TCP sessions with MD5 authentication enabled (e.g., BGP with MD5 authentication).<br /> <br /> This issue affects Junos OS Evolved: <br /> <br /> <br /> <br /> * All versions before 21.2R3-S8-EVO, <br /> * from 21.4-EVO before 21.4R3-S6-EVO, <br /> * from 22.1-EVO before 22.1R3-S4-EVO, <br /> * from 22.2-EVO before 22.2R3-S4-EVO, <br /> * from 22.3-EVO before 22.3R3-S3-EVO, <br /> * from 22.4-EVO before 22.4R2-S2-EVO, 22.4R3-EVO.

Impact

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

Base Score: 8.20 HIGH
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/R:A

Attack Vector (AV): Network
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): Low
Recovery (R): Automatic

Base Score 4.0
8.20
Severity 4.0
HIGH
Vector 3.x
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.90 MEDIUM
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
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
5.90
Severity 3.x
MEDIUM

Vulnerable products and versions

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

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


References to Advisories, Solutions, and Tools