CVE-2023-46324 : Exploit Details and Defense Strategies
Learn about CVE-2023-46324, a security flaw in free5GC udm version before 1.2.0 enabling an Invalid Curve Attack and arbitrary decryption attempts by threat actors.
A security vulnerability in free5GC udm version before 1.2.0 has been identified, allowing an Invalid Curve Attack to take place. Attackers can manipulate SUCIs to the UDM, leading to potential decryption via unauthorized keys.
Understanding CVE-2023-46324
This section provides insights into the nature and impact of the CVE-2023-46324 vulnerability.
What is CVE-2023-46324?
The CVE-2023-46324 vulnerability exists in free5GC udm before version 1.2.0, specifically when using Go versions before 1.19. It enables an Invalid Curve Attack due to the computation of a shared secret via an uncompressed public key that lacks validation.
The Impact of CVE-2023-46324
The vulnerability allows threat actors to send arbitrary SUCIs to the UDM, which can then attempt to decrypt them using both the malicious public key and its private key.
Technical Details of CVE-2023-46324
In this section, we delve deeper into the technical aspects of the CVE-2023-46324 vulnerability.
Vulnerability Description
The root cause of this vulnerability lies in the insecure computation of shared secrets and the lack of validation for uncompressed public keys.
Affected Systems and Versions
The vulnerability impacts free5GC udm versions prior to 1.2.0 when utilizing Go versions before 1.19.
Exploitation Mechanism
Attackers exploit this vulnerability by manipulating SUCIs to initiate unauthorized decryption attempts by the UDM.
Mitigation and Prevention
Discover the actions and measures to mitigate the risks posed by CVE-2023-46324 in this section.
Immediate Steps to Take
It is crucial to update the free5GC udm to version 1.2.0 or above to eliminate this vulnerability. Additionally, validating public keys before computing shared secrets is a recommended practice.
Long-Term Security Practices
In the long term, enforcing strict input validation, utilizing secure cryptographic practices, and staying updated with the latest software versions are essential to prevent similar vulnerabilities.
Patching and Updates
Regularly check for security patches and updates from free5GC to ensure your systems are protected against known vulnerabilities.