CVE-2023-44188

published 2023-10-11

CVE-2023-44188: A Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in telemetry processing of Juniper Networks Junos OS allows a network-based authenticated…

Priority P4 29 medium 5.3 CVSS 3.1

AV N AC H PR L UI N S U C N I N A H

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.

Note: jkdsd is not shipped with SRX Series devices and therefore are not affected by this vulnerability.
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.

This issue does not affect Juniper Networks Junos OS versions prior to 19.4R1.

Affected

24 ranges

Vendor	Product	Version range	Fixed in
juniper	junos	< 20.4	20.4
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos	—	—
juniper	junos_os	—	—
juniper	srx_series	—	—
juniper_networks	junos_os	>= 20.4 < 20.4R3-S9	20.4R3-S9
juniper_networks	junos_os	>= 21.1R1 < 21.1*	21.1*
juniper_networks	junos_os	>= 21.2 < 21.2R3-S6	21.2R3-S6
juniper_networks	junos_os	>= 21.3 < 21.3R3-S5	21.3R3-S5
juniper_networks	junos_os	>= 21.4 < 21.4R3-S5	21.4R3-S5
juniper_networks	junos_os	>= 22.1 < 22.1R3-S4	22.1R3-S4
juniper_networks	junos_os	>= 22.2 < 22.2R3-S2	22.2R3-S2
juniper_networks	junos_os	>= 22.3 < 22.3R2-S1, 22.3R3-S1	22.3R2-S1, 22.3R3-S1
juniper_networks	junos_os	>= 22.4 < 22.4R2-S2, 22.4R3	22.4R2-S2, 22.4R3
juniper_networks	junos_os	>= 23.1 < 23.1R2	23.1R2

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