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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.
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CVE Modified by Juniper Networks, Inc.7/18/2024 8:15:02 AM
Action
Type
Old Value
New Value
Changed
Description
An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).
If an SRX Series 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.
Junos OS versions prior to 21.4R1 are not affected by this issue.
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.
Removed
CVSS V4.0
Juniper Networks, Inc. AV: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:Y/R:A/V:X/RE:M/U:Red
New CVE Received from Juniper Networks, Inc.7/01/2024 1:15:05 PM
Action
Type
Old Value
New Value
Added
Description
An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).
If an SRX Series 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.
Junos OS versions prior to 21.4R1 are not affected by this issue.
Added
CVSS V4.0
Juniper Networks, Inc. CVSS:4.0/AV: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:Y/R:A/V:X/RE:M/U:Red
Added
CVSS V3.1
Juniper Networks, Inc. AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Added
CWE
Juniper Networks, Inc. CWE-754
Added
Reference
Juniper Networks, Inc. https://supportportal.juniper.net/JSA83195 [No types assigned]
Quick Info
CVE Dictionary Entry: CVE-2024-21586 NVD
Published Date: 07/01/2024 NVD
Last Modified: 01/22/2026
Source: Juniper Networks, Inc.