CVE-2024-20685

Azure Private 5G Core Denial of Service Vulnerability

Severity Score

5.9

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Attend

*SSVC

Descriptions

Azure Private 5G Core Denial of Service Vulnerability

Vulnerabilidad de denegación de servicio del núcleo privado 5G de Azure

This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Microsoft Azure Private 5G Core. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the handling of InitialUEMessage messages. The issue results from improper length validation. An attacker can leverage this vulnerability to create a denial-of-service condition on the 5G network.

*Credits: Salim S.I, Richard Y Lin, Atlas Huang (CTOne/TrendMicro)

CVSS Scores

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

High

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:Attend

Exploitation

None

Automatable

Yes

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2023-11-28 CVE Reserved
2024-04-09 CVE Published
2025-01-11 EPSS Updated
2025-01-23 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-130: Improper Handling of Length Parameter Inconsistency

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-20685	2024-04-10

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Microsoft Search vendor "Microsoft"		Azure Search vendor "Microsoft" for product "Azure"				*		-		Affected
Microsoft Search vendor "Microsoft"		Azure Private 5g Core Search vendor "Microsoft" for product "Azure Private 5g Core"				*		-		Affected