PT-2024-8671 · Juniper Networks · Junos+1

Published

2024-07-10

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Updated

2024-07-12

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CVE-2024-39542

CVSS v4.0

8.7

High

VectorAV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Name of the Vulnerable Software and Affected Versions Junos OS versions prior to 21.2R3-S4 Junos OS versions 21.4 prior to 21.4R2 Junos OS versions 22.2 prior to 22.2R3-S2 Junos OS Evolved versions prior to 21.2R3-S8-EVO Junos OS Evolved versions 21.4 prior to 21.4R2-EVO
Description An Improper Validation of Syntactic Correctness of Input issue in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS). This issue can occur in two scenarios:
  1. If a device configured with SFLOW and ECMP receives specific valid transit traffic subject to sampling, the packetio process crashes, leading to an evo-aftman crash and causing the FPC to stop working until it is restarted.
  2. If a device receives a malformed CFM packet on an interface configured with CFM, the packetio process crashes, leading to an evo-aftman crash and causing the FPC to stop working until it is restarted.
Recommendations For Junos OS versions prior to 21.2R3-S4, update to version 21.2R3-S4 or later. For Junos OS versions 21.4 prior to 21.4R2, update to version 21.4R2 or later. For Junos OS versions 22.2 prior to 22.2R3-S2, update to version 22.2R3-S2 or later. For Junos OS Evolved versions prior to 21.2R3-S8-EVO, update to version 21.2R3-S8-EVO or later. For Junos OS Evolved versions 21.4 prior to 21.4R2-EVO, update to version 21.4R2-EVO or later.

Fix

Weakness Enumeration

CWE-1286

Related Identifiers

BDU:2024-10273
CVE-2024-39542

Affected Products

Junos
Junos Evolved