CVE-2024-39550

Junos OS: MX Series with SPC3 line card: Port flaps causes rtlogd memory leak leading to Denial of Service

Severity Score

7.1

*CVSS v4

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

A Missing Release of Memory after Effective Lifetime vulnerability in the rtlogd process of Juniper Networks Junos OS on MX Series with SPC3 allows an unauthenticated, adjacent attacker to trigger internal events cause ( which can be done by repeated port flaps) to cause a slow memory leak, ultimately leading to a Denial of Service (DoS).

Memory can only be recovered by manually restarting rtlogd process.
The memory usage can be monitored using the below command.

user@host> show system processes extensive | match rtlog

This issue affects Junos OS on MX Series with SPC3 line card:

* from 21.2R3 before 21.2R3-S8,
* from 21.4R2 before 21.4R3-S6,
* from 22.1 before 22.1R3-S5,
* from 22.2 before 22.2R3-S3,
* from 22.3 before 22.3R3-S2,
* from 22.4 before 22.4R3-S1,
* from 23.2 before 23.2R2,
* from 23.4 before 23.4R2.

Una vulnerabilidad de liberación de memoria faltante después de la vida útil efectiva en el proceso rtlogd de Juniper Networks Junos OS en la serie MX con SPC3 permite que un atacante adyacente no autenticado desencadene una causa de eventos internos (que se puede lograr mediante solapas repetidas de puertos) para causar una pérdida de memoria lenta. , lo que en última instancia conduce a una denegación de servicio (DoS). La memoria sólo se puede recuperar reiniciando manualmente el proceso rtlogd. El uso de la memoria se puede monitorear usando el siguiente comando. usuario@host> show system processes extensive | match rtlog Este problema afecta a Junos OS en la serie MX con tarjeta de línea SPC3: * desde 21.2R3 antes de 21.2R3-S8, * desde 21.4R2 antes de 21.4R3-S6, * desde 22.1 antes de 22.1R3-S5, * desde 22.2 antes de 22.2R3 -S3, * de 22.3 antes de 22.3R3-S2, * de 22.4 antes de 22.4R3-S1, * de 23.2 antes de 23.2R2, * de 23.4 antes de 23.4R2.

*Credits: N/A

CVSS Scores

Attack Vector

Adjacent

Attack Complexity

Low

Attack Requirements

None

Privileges Required

None

User Interaction

None

System

Vulnerable | Subsequent

Confidentiality

None

Integrity

None

Availability

High

None

Attack Vector

Adjacent

Attack Complexity

Low

Attack Requirements

None

Privileges Required

None

User Interaction

None

System

Vulnerable | Subsequent

Confidentiality

None

Integrity

None

Availability

High

None

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-06-25 CVE Reserved
2024-07-11 CVE Published
2024-07-12 EPSS Updated
2024-08-02 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-401: Missing Release of Memory after Effective Lifetime

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://supportportal.juniper.net/JSA83012	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"				>= 21.2R3 < 21.2R3-S8 Search vendor "Juniper Networks" for product "Junos OS" and version " >= 21.2R3 < 21.2R3-S8"		en		Affected
Juniper Networks Search vendor "Juniper Networks"		Junos OS Search vendor "Juniper Networks" for product "Junos OS"				>= 21.4R2 < 21.4R3-S6 Search vendor "Juniper Networks" for product "Junos OS" and version " >= 21.4R2 < 21.4R3-S6"		en		Affected
Juniper Networks Search vendor "Juniper Networks"		Junos OS Search vendor "Juniper Networks" for product "Junos OS"				>= 22.1 < 22.1R3-S5 Search vendor "Juniper Networks" for product "Junos OS" and version " >= 22.1 < 22.1R3-S5"		en		Affected
Juniper Networks Search vendor "Juniper Networks"		Junos OS Search vendor "Juniper Networks" for product "Junos OS"				>= 22.2 < 22.2R3-S3 Search vendor "Juniper Networks" for product "Junos OS" and version " >= 22.2 < 22.2R3-S3"		en		Affected
Juniper Networks Search vendor "Juniper Networks"		Junos OS Search vendor "Juniper Networks" for product "Junos OS"				>= 22.3 < 22.3R3-S2 Search vendor "Juniper Networks" for product "Junos OS" and version " >= 22.3 < 22.3R3-S2"		en		Affected
Juniper Networks Search vendor "Juniper Networks"		Junos OS Search vendor "Juniper Networks" for product "Junos OS"				>= 22.4 < 22.4R3-S1 Search vendor "Juniper Networks" for product "Junos OS" and version " >= 22.4 < 22.4R3-S1"		en		Affected
Juniper Networks Search vendor "Juniper Networks"		Junos OS Search vendor "Juniper Networks" for product "Junos OS"				>= 23.2 < 23.2R2 Search vendor "Juniper Networks" for product "Junos OS" and version " >= 23.2 < 23.2R2"		en		Affected
Juniper Networks Search vendor "Juniper Networks"		Junos OS Search vendor "Juniper Networks" for product "Junos OS"				>= 23.4 < 23.4R2 Search vendor "Juniper Networks" for product "Junos OS" and version " >= 23.4 < 23.4R2"		en		Affected