CVE-2024-21586

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

Description

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.

Remediation

Solution:

  • The following software releases have been updated to resolve this specific issue: SRX Series: 21.4R3-S7.9, 22.1R3-S5.3, 22.2R3-S4.11, 22.3R3, 22.4R3, 23.2R1, and all subsequent releases; NFX Series: 21.4R3-S8, 22.2R3-S5*, 22.3R3, 22.4R3, 23.2R1, and all subsequent releases. * Pending publication. Please note that the software versions 21.4R3-S7.9, 22.1R3-S5.3 and 22.2R3-S4.11 are respins of previously released versions, so special attention needs to be paid to the last digits of the version number.

Workaround:

  • There are no known workarounds for this issue.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.24%
Vendor Advisory juniper.net
Affected: Juniper Networks Junos OS
Affected: Juniper Networks Junos OS
Published at:
Updated at:

References

Link Tags
https://supportportal.juniper.net/JSA83195 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2024-21586?
CVE-2024-21586 has been scored as a high severity vulnerability.
How to fix CVE-2024-21586?
To fix CVE-2024-21586: The following software releases have been updated to resolve this specific issue: SRX Series: 21.4R3-S7.9, 22.1R3-S5.3, 22.2R3-S4.11, 22.3R3, 22.4R3, 23.2R1, and all subsequent releases; NFX Series: 21.4R3-S8, 22.2R3-S5*, 22.3R3, 22.4R3, 23.2R1, and all subsequent releases. * Pending publication. Please note that the software versions 21.4R3-S7.9, 22.1R3-S5.3 and 22.2R3-S4.11 are respins of previously released versions, so special attention needs to be paid to the last digits of the version number.
Is CVE-2024-21586 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2024-21586 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-21586?
CVE-2024-21586 affects Juniper Networks Junos OS, Juniper Networks Junos OS.
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