UDP: Junos OS on SRX Series Unauthenticated DoS

This signature detects attempts to exploit a known vulnerability against Juniper Networks Junos OS on SRX Series. A successful attack can result in a denial-of-service condition.

Extended 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.

References

CVE: CVE-2024-21586

URL: https://supportportal.juniper.net/s/article/2024-07-Out-of-Cycle-Security-Bulletin-Junos-OS-SRX-Series-Specific-valid-traffic-leads-to-a-PFE-crash-CVE-2024-21586?language=en_US https://www.cve.org/cverecord?id=CVE-2024-21586

Short Name

UDP:CVE-2024-21586-DOS

Severity

Major

Recommended

True

Recommended Action

None

UDP: Junos OS on SRX Series Unauthenticated DoS

Extended Description

References

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