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

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CVE-2024-39540

Severity CVSS v4.0:
HIGH
Type:
Unavailable / Other
Publication date:
11/07/2024
Last modified:
11/04/2025

Description

An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS on SRX Series, and MX Series with SPC3 allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).<br /> <br /> When an affected device receives specific valid TCP traffic, the pfe crashes and restarts leading to a momentary but complete service outage.<br /> <br /> This issue affects Junos OS:<br /> <br /> 21.2 releases from 21.2R3-S5 before 21.2R3-S6.<br /> <br /> This issue does not affect earlier or later releases.

Impact

Vector 4.0
CVSS:4.0/AV:N/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: 8.70 HIGH
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L

Attack Vector (AV): Network
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
8.70
Severity 4.0
HIGH
Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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

Base Score 3.x
7.50
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:juniper:junos:21.2:r3-s5:*:*:*:*:*:*
cpe:2.3:h:juniper:csrx:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:mx240:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:mx480:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:mx960:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:srx100:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:srx110:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:srx1400:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:srx1500:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:srx1600:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:srx210:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:srx220:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:srx2300:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:srx240:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:srx240h2:-:*:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools