Advisory Details

April 9th, 2024

Microsoft Azure Private 5G Core InitialUEMessage Improper Input Validation Denial-of-Service Vulnerability

CVE ID	CVE-2024-20685
CVSS SCORE	5.9, AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
AFFECTED VENDORS	Microsoft
AFFECTED PRODUCTS	Azure
VULNERABILITY DETAILS	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.
ADDITIONAL DETAILS	Microsoft has issued an update to correct this vulnerability. More details can be found at: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-20685
DISCLOSURE TIMELINE	2024-03-07 - Vulnerability reported to vendor 2024-04-09 - Coordinated public release of advisory 2024-07-01 - Advisory Updated
CREDIT	Salim S.I, Richard Y Lin, Atlas Huang (CTOne/TrendMicro)

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