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Junos CVE-2024-30402

HIGH
Improper Check for Unusual or Exceptional Conditions (CWE-754)
2024-04-12 sirt@juniper.net
Juniper Denial Of Service Junos Junos Os Evolved
8.2
CVSS 4.0 · Vendor: juniper
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Severity by source

Vendor (juniper) PRIMARY
8.2 HIGH
CVSS:4.0/AV:N/AC:L/AT:P/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

Primary rating from Vendor (juniper) · only source for this CVE.

CVSS VectorVendor: juniper

CVSS:4.0/AV:N/AC:L/AT:P/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
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

1
CVE Published
Apr 12, 2024 - 16:15 cve.org
HIGH 8.2

DescriptionCVE.org

An Improper Check for Unusual or Exceptional Conditions vulnerability in the Layer 2 Address Learning Daemon (l2ald) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS).

When telemetry requests are sent to the device, and the Dynamic Rendering Daemon (drend) is suspended, the l2ald crashes and restarts due to factors outside the attackers control. Repeated occurrences of these events causes a sustained DoS condition.

This issue affects: Junos OS:

  • All versions earlier than 20.4R3-S10;
  • 21.2 versions earlier than 21.2R3-S7;
  • 21.4 versions earlier than 21.4R3-S5;
  • 22.1 versions earlier than 22.1R3-S4;
  • 22.2 versions earlier than 22.2R3-S3;
  • 22.3 versions earlier than 22.3R3-S1;
  • 22.4 versions earlier than 22.4R3;
  • 23.2 versions earlier than 23.2R1-S2, 23.2R2.

Junos OS Evolved:

  • All versions earlier than 21.4R3-S5-EVO;
  • 22.1-EVO versions earlier than 22.1R3-S4-EVO;
  • 22.2-EVO versions earlier than 22.2R3-S3-EVO;
  • 22.3-EVO versions earlier than 22.3R3-S1-EVO;
  • 22.4-EVO versions earlier than 22.4R3-EVO;
  • 23.2-EVO versions earlier than 23.2R2-EVO.

AnalysisAI

An Improper Check for Unusual or Exceptional Conditions vulnerability in the Layer 2 Address Learning Daemon (l2ald) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated,. Rated high severity (CVSS 8.2), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-754. An Improper Check for Unusual or Exceptional Conditions vulnerability in the Layer 2 Address Learning Daemon (l2ald) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS). When telemetry requests are sent to the device, and the Dynamic Rendering Daemon (drend) is suspended, the l2ald crashes and restarts due to factors outside the attackers control. Repeated occurrences of these events causes a sustained DoS condition. This issue affects: Junos OS: * All versions earlier than 20.4R3-S10; * 21.2 versions earlier than 21.2R3-S7; * 21.4 versions earlier than 21.4R3-S5; * 22.1 versions earlier than 22.1R3-S4; * 22.2 versions earlier than 22.2R3-S3; * 22.3 versions earlier than 22.3R3-S1; * 22.4 versions earlier than 22.4R3; * 23.2 versions earlier than 23.2R1-S2, 23.2R2. Junos OS Evolved: * All versions earlier than 21.4R3-S5-EVO; * 22.1-EVO versions earlier than 22.1R3-S4-EVO; * 22.2-EVO versions earlier than 22.2R3-S3-EVO; * 22.3-EVO versions earlier than 22.3R3-S1-EVO; * 22.4-EVO versions earlier than 22.4R3-EVO; * 23.2-EVO versions earlier than 23.2R2-EVO. Affected products include: Juniper Junos, Juniper Junos Os Evolved.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

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CVE-2024-30402 vulnerability details – vuln.today
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