CVE-2024-39540: Junos OS: SRX Series, and MX Series with SPC3: Specific valid TCP traffic can cause a pfe crash
An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS on SRX Series, and MX Series with SPC3 allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).
When an affected device receives specific valid TCP traffic, the pfe crashes and restarts leading to a momentary but complete service outage.
This issue affects Junos OS:
21.2 releases from 21.2R3-S5 before 21.2R3-S6.
This issue does not affect earlier or later releases.
Affected Software
Remediation
Information
Event History
Frequently Asked Questions
What is the severity of CVE-2024-39540?
CVE-2024-39540 is classified as a critical vulnerability due to its potential to cause Denial-of-Service (DoS) attacks.
How do I fix CVE-2024-39540?
To fix CVE-2024-39540, you should upgrade your Junos OS to a version later than 21.2R3-S6.
Who is affected by CVE-2024-39540?
CVE-2024-39540 affects Juniper Networks Junos OS on SRX Series and MX Series devices with SPC3.
Can CVE-2024-39540 be exploited remotely?
Yes, CVE-2024-39540 can be exploited by unauthenticated, network-based attackers.
What is the impact of CVE-2024-39540?
The impact of CVE-2024-39540 is the potential for a Denial-of-Service (DoS), disrupting network availability.