CVE-2024-39545 Denial of service in Junos OS

High 8.7 Published 11 Jul 2024 Updated 2 Aug 2024

An unauthenticated attacker can crash the IKE daemon by sending mismatched IPsec parameters, causing a denial of service on Juniper network devices.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2024-39545?

CVE-2024-39545 is a high-severity denial of service vulnerability in Juniper Junos, published on 11 Jul 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An Improper Check for Unusual or Exceptional Conditions vulnerability in the the IKE daemon (iked) of Juniper Networks Junos OS on SRX Series, MX Series with SPC3 and NFX350 allows allows an unauthenticated, network-based attacker sending specific mismatching parameters as part of the IPsec negotiation to trigger an iked crash leading to Denial of Service (DoS).

This issue is applicable to all platforms that run iked. This issue affects Junos OS on SRX Series, MX Series with SPC3 and NFX350:

* All versions before 21.2R3-S8, * from 21.4 before 21.4R3-S7, * from 22.1 before 22.1R3-S2, * from 22.2 before 22.2R3-S1, * from 22.3 before 22.3R2-S1, 22.3R3, * from 22.4 before 22.4R1-S2, 22.4R2, 22.4R3.

Weakness: CWE-754

Which versions are affected by CVE-2024-39545?

It affects 1 product.

Products include Juniper Junos.

How do I fix CVE-2024-39545?

No fix has been published for CVE-2024-39545 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2024-39545 being exploited?

There is no known exploitation of CVE-2024-39545 in the wild and no public exploit code.

All Juniper Junos vulnerabilities

Sources

Also known as GHSA-mhxw-prxv-h6hr.