Juniper Junos OS Telemetry toctou

Summaryinfo

A vulnerability described as problematic has been identified in Juniper Junos OS. The impacted element is an unknown function of the component Telemetry. The manipulation results in toctou. This vulnerability is cataloged as CVE-2023-44188. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in Juniper Junos OS (Router Operating System) (unknown version). Affected is an unknown code block of the component Telemetry. The manipulation with an unknown input leads to a toctou vulnerability. CWE is classifying the issue as CWE-367. The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state. This is going to have an impact on availability. CVE summarizes:

A Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in telemetry processing of Juniper Networks Junos OS allows a network-based authenticated attacker to flood the system with multiple telemetry requests, causing the Junos Kernel Debugging Streaming Daemon (jkdsd) process to crash, leading to a Denial of Service (DoS). Continued receipt and processing of telemetry requests will repeatedly crash the jkdsd process and sustain the Denial of Service (DoS) condition. This issue is seen on all Junos platforms. The crash is triggered when multiple telemetry requests come from different collectors. As the load increases, the Dynamic Rendering Daemon (drend) decides to defer processing and continue later, which results in a timing issue accessing stale memory, causing the jkdsd process to crash and restart. This issue affects: Juniper Networks Junos OS: * 20.4 versions prior to 20.4R3-S9; * 21.1 versions 21.1R1 and later; * 21.2 versions prior to 21.2R3-S6; * 21.3 versions prior to 21.3R3-S5; * 21.4 versions prior to 21.4R3-S5; * 22.1 versions prior to 22.1R3-S4; * 22.2 versions prior to 22.2R3-S2; * 22.3 versions prior to 22.3R2-S1, 22.3R3-S1; * 22.4 versions prior to 22.4R2-S2, 22.4R3; * 23.1 versions prior to 23.1R2; * 23.2 versions prior to 23.2R2. This issue does not affect Juniper Networks Junos OS versions prior to 19.4R1.

The weakness was shared 10/12/2023 as JSA73152. The advisory is available at supportportal.juniper.net. This vulnerability is traded as CVE-2023-44188 since 09/26/2023. The technical details are unknown and an exploit is not available.

Upgrading eliminates this vulnerability.

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Productinfo

Type

• Router Operating System

Vendor

• Juniper

Name

• Junos OS

License

• commercial

Website

• Vendor: https://www.juniper.net/

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