CVE-2023-44188 Junos OS: jkdsd crash due to multiple telemetry requests
An authenticated attacker can cause a denial of service in Junos OS by flooding telemetry requests, crashing the jkdsd process.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-44188?
CVE-2023-44188 is a medium-severity vulnerability in Juniper Junos, published on 11 Oct 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-367
Which versions are affected by CVE-2023-44188?
It affects 1 product.
Products include Juniper Junos.
How do I fix CVE-2023-44188?
No fix has been published for CVE-2023-44188 yet. Limit exposure of the affected software until one is available.
Is CVE-2023-44188 being exploited?
There is no known exploitation of CVE-2023-44188 in the wild and no public exploit code.
Other vulnerabilities in Juniper Junos
- CVE-2023-36845 Juniper Junos OS EX Series and SRX Series PHP External Variable Modification
- CVE-2020-1631 Juniper Junos OS Path Traversal
- CVE-2025-21590 Juniper Junos OS Improper Isolation or Compartmentalization
- CVE-2023-36851 Juniper Junos OS SRX Series Missing Authentication for Critical Function
- CVE-2023-36844 Juniper Junos OS EX Series PHP External Variable Modification
Sources
Also known as GHSA-w3pf-28jm-x86v.