Juniper Networks Junos OS up to 23.2R1 Telemetry Sensor Process heap-based overflow

Summaryinfo

A vulnerability categorized as critical has been discovered in Juniper Networks Junos OS up to 23.2R1. Affected by this issue is some unknown functionality of the component Telemetry Sensor Process. Such manipulation leads to heap-based overflow. This vulnerability is listed as CVE-2024-39518. The attack may be performed from remote. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Juniper Networks Junos OS up to 23.2R1. Affected by this issue is an unknown functionality of the component Telemetry Sensor Process. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). Impacted is availability. CVE summarizes:

A Heap-based Buffer Overflow vulnerability in the telemetry sensor process (sensord) of Juniper Networks Junos OS on MX240, MX480, MX960 platforms using MPC10E causes a steady increase in memory utilization, ultimately leading to a Denial of Service (DoS). When the device is subscribed to a specific subscription on Junos Telemetry Interface, a slow memory leak occurs and eventually all resources are consumed and the device becomes unresponsive. A manual reboot of the Line Card will be required to restore the device to its normal functioning.  This issue is only seen when telemetry subscription is active. The Heap memory utilization can be monitored using the following command:   > show system processes extensive The following command can be used to monitor the memory utilization of the specific sensor   > show system info | match sensord PID NAME MEMORY PEAK MEMORY %CPU THREAD-COUNT CORE-AFFINITY UPTIME 1986 sensord 877.57MB 877.57MB 2 4 0,2-15 7-21:41:32 This issue affects Junos OS:  * from 21.2R3-S5 before 21.2R3-S7,  * from 21.4R3-S4 before 21.4R3-S6,  * from 22.2R3 before 22.2R3-S4,  * from 22.3R2 before 22.3R3-S2,  * from 22.4R1 before 22.4R3,  * from 23.2R1 before 23.2R2.

The advisory is available at supportportal.juniper.net. This vulnerability is handled as CVE-2024-39518 since 06/25/2024. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 07/11/2024).

Upgrading to version 21.2R3-S7, 21.4R3-S6, 22.2R3-S4, 22.3R3-S2, 22.4R3 or 23.2R2 eliminates this vulnerability.

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Productinfo

Type

• Router Operating System

Vendor

• Juniper Networks

Name

• Junos OS

Version

• 21.2R3-S6
• 21.4R3-S5
• 22.2R3-S3
• 22.3R3-S1
• 22.4R2
• 23.2R1

License

• commercial

CPE 2.3info

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CPE 2.2info

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