CVE-2024-39530

Junos OS: Attempting to access specific sensors on platforms not supporting these will lead to a chassisd crash

Severity Score

8.7

*CVSS v4

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Attend

*SSVC

Descriptions

An Improper Check for Unusual or Exceptional Conditions vulnerability in the chassis management daemon (chassisd) of Juniper Networks Junos OS allows an unauthenticated, network-based attacker to cause a

Denial-of-Service (DoS).

If an attempt is made to access specific sensors on platforms not supporting these sensors, either via GRPC or netconf, chassisd will crash and restart leading to a restart of all FPCs and thereby a complete outage.

This issue affects Junos OS:

* 21.4 versions from 21.4R3 before 21.4R3-S5,
* 22.1 versions from 22.1R3 before 22.1R3-S4,
* 22.2 versions from 22.2R2 before 22.2R3,
* 22.3 versions from 22.3R1 before 22.3R2-S2, 22.3R3,
* 22.4 versions from 22.4R1 before 22.4R2.

This issue does not affect Junos OS versions earlier than 21.4.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Attack Requirements

None

Privileges Required

None

User Interaction

None

System

Vulnerable | Subsequent

Confidentiality

None

Integrity

None

Availability

High

Low

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:Attend

Exploitation

None

Automatable

Yes

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-06-25 CVE Reserved
2024-07-11 CVE Published
2024-08-02 CVE Updated
2024-09-24 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-754: Improper Check for Unusual or Exceptional Conditions

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://supportportal.juniper.net/JSA82989	2024-07-11

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Juniper Networks Search vendor "Juniper Networks"		Junos OS Search vendor "Juniper Networks" for product "Junos OS"				>= 21.4R3 < 21.4R3-S5 Search vendor "Juniper Networks" for product "Junos OS" and version " >= 21.4R3 < 21.4R3-S5"		en		Affected
Juniper Networks Search vendor "Juniper Networks"		Junos OS Search vendor "Juniper Networks" for product "Junos OS"				>= 22.1R3 < 22.1R3-S4 Search vendor "Juniper Networks" for product "Junos OS" and version " >= 22.1R3 < 22.1R3-S4"		en		Affected
Juniper Networks Search vendor "Juniper Networks"		Junos OS Search vendor "Juniper Networks" for product "Junos OS"				>= 22.2R2 < 22.2R3 Search vendor "Juniper Networks" for product "Junos OS" and version " >= 22.2R2 < 22.2R3"		en		Affected
Juniper Networks Search vendor "Juniper Networks"		Junos OS Search vendor "Juniper Networks" for product "Junos OS"				>= 22.3R1 < 22.3R2-S2 Search vendor "Juniper Networks" for product "Junos OS" and version " >= 22.3R1 < 22.3R2-S2"		en		Affected
Juniper Networks Search vendor "Juniper Networks"		Junos OS Search vendor "Juniper Networks" for product "Junos OS"				>= 22.3R1 < 22.3R3 Search vendor "Juniper Networks" for product "Junos OS" and version " >= 22.3R1 < 22.3R3"		en		Affected
Juniper Networks Search vendor "Juniper Networks"		Junos OS Search vendor "Juniper Networks" for product "Junos OS"				>= 22.4R1 < 22.4R2 Search vendor "Juniper Networks" for product "Junos OS" and version " >= 22.4R1 < 22.4R2"		en		Affected