CVE-2024-39540: Junos OS: SRX Series, and MX Series with SPC3: Specific valid TCP traffic can cause a pfe crash
First published: Thu Jul 11 2024(Updated: )
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.
Credit: sirt@juniper.net
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Juniper Networks Junos OS | >=21.2R3-S5<21.2R3-S6 |
Remedy
The following software releases have been updated to resolve this specific issue: 21.2R3-S6.
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