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    CVE-2024-39540

    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.

    Published:Jul 11, 2024
    Last Modified:Apr 11, 2025
    EPS:Jul 11, 2024
    EPSS Score:0.00516
    CVSS Score:7.5

    Affected Products

    Vendor
    Juniper
    Product
    Csrx
    Vendor
    Juniper
    Product
    Junos
    Vendor
    Juniper
    Product
    Mx240
    Vendor
    Juniper
    Product
    Mx480
    Vendor
    Juniper
    Product
    Mx960
    Vendor
    Juniper
    Product
    Srx100
    Vendor
    Juniper
    Product
    Srx110
    Vendor
    Juniper
    Product
    Srx1400
    Vendor
    Juniper
    Product
    Srx1500
    Vendor
    Juniper
    Product
    Srx1600
    Vendor
    Juniper
    Product
    Srx210
    Vendor
    Juniper
    Product
    Srx220
    Vendor
    Juniper
    Product
    Srx2300
    Vendor
    Juniper
    Product
    Srx240
    Vendor
    Juniper
    Product
    Srx240h2
    Vendor
    Juniper
    Product
    Srx240m
    Vendor
    Juniper
    Product
    Srx300
    Vendor
    Juniper
    Product
    Srx320
    Vendor
    Juniper
    Product
    Srx340
    Vendor
    Juniper
    Product
    Srx3400
    Vendor
    Juniper
    Product
    Srx345
    Vendor
    Juniper
    Product
    Srx3600
    Vendor
    Juniper
    Product
    Srx380
    Vendor
    Juniper
    Product
    Srx4000
    Vendor
    Juniper
    Product
    Srx4100
    Vendor
    Juniper
    Product
    Srx4200
    Vendor
    Juniper
    Product
    Srx4300
    Vendor
    Juniper
    Product
    Srx4600
    Vendor
    Juniper
    Product
    Srx4700
    Vendor
    Juniper
    Product
    Srx5000
    Vendor
    Juniper
    Product
    Srx5400
    Vendor
    Juniper
    Product
    Srx550
    Vendor
    Juniper
    Product
    Srx550 Hm
    Vendor
    Juniper
    Product
    Srx550m
    Vendor
    Juniper
    Product
    Srx5600
    Vendor
    Juniper
    Product
    Srx5800
    Vendor
    Juniper
    Product
    Srx650
    Vendor
    Juniper
    Product
    Vsrx

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2023-28985 (CVSS 7.5) — An Improper Validation of Syntactic Correctness of Input vulnerability in Intrusion Detection and Prevention (…
    CVE-2023-36838 (CVSS 5.5) — An Out-of-bounds Read vulnerability in the flow processing daemon (flowd) of Juniper Networks Junos OS on SRX …
    CVE-2023-36831 (CVSS 7.5) — An Improper Check or Handling of Exceptional Conditions vulnerability in the UTM (Unified Threat Management) W…
    CVE-2022-22251 (CVSS 7.8) — On cSRX Series devices software permission issues in the container filesystem and stored files combined with s…
    CVE-2021-0289 (CVSS 6.5) — When user-defined ARP Policer is configured and applied on one or more Aggregated Ethernet (AE) interface unit…
    CVE-2021-0266 (CVSS 8.1) — The use of multiple hard-coded cryptographic keys in cSRX Series software in Juniper Networks Junos OS allows …
    CVE-2019-0075 (CVSS 7.5) — A vulnerability in the srxpfe process on Protocol Independent Multicast (PIM) enabled SRX series devices may l…
    CVE-2019-0068 (CVSS 6.5) — The SRX flowd process, responsible for packet forwarding, may crash and restart when processing specific multi…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High