Junos OS: SRX Series and NFX Series: Specific valid traffic leads to a PFE crash

Summary

An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on SRX Series and NFX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS). If an affected device receives specific valid traffic destined to the device, it will cause the PFE to crash and restart. Continued receipt and processing of this traffic will create a sustained DoS condition. This issue affects Junos OS on SRX Series: • 21.4 versions before 21.4R3-S7.9, • 22.1 versions before 22.1R3-S5.3, • 22.2 versions before 22.2R3-S4.11, • 22.3 versions before 22.3R3, • 22.4 versions before 22.4R3. This issue affects Junos OS on NFX Series: • 21.4 versions before 21.4R3-S8, • 22.1 versions after 22.1R1, • 22.2 versions before 22.2R3-S5, • 22.3 versions before 22.3R3, • 22.4 versions before 22.4R3. Junos OS versions prior to 21.4R1 are not affected by this issue.

Timeline

1. Jul 1, 2024, 4:34 PM UTCCVE published
2. Jul 1, 2024, 6:15 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: yes · Technical impact: partial

3. Aug 1, 2024, 10:27 PM UTCRecord last updated

Affected versions

• Juniper Networks Junos OS

  From 21.4 · fixed in 21.4R3-S7.9; From 22.1 · fixed in 22.1R3-S5.3; From 22.2 · fixed in 22.2R3-S4.11; From 22.3 · fixed in 22.3R3; From 22.4 · fixed in 22.4R3

• Juniper Networks Junos OS

  From 21.4 · fixed in 21.4R3-S8; From 22.2 · fixed in 22.2R3-S5; From 22.3 · fixed in 22.3R3; From 22.4 · fixed in 22.4R3

References 1