wolfSSL 1.3 Key input validation

Summaryinfo

A vulnerability categorized as critical has been discovered in wolfSSL 1.3. The impacted element is an unknown function of the component Key Handler. Executing a manipulation can lead to input validation. This vulnerability is registered as CVE-2023-3724. It is possible to launch the attack remotely. No exploit is available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in wolfSSL 1.3. It has been declared as critical. This vulnerability affects an unknown functionality of the component Key Handler. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

If a TLS 1.3 client gets neither a PSK (pre shared key) extension nor a KSE (key share extension) when connecting to a malicious server, a default predictable buffer gets used for the IKM (Input Keying Material) value when generating the session master secret. Using a potentially known IKM value when generating the session master secret key compromises the key generated, allowing an eavesdropper to reconstruct it and potentially allowing access to or meddling with message contents in the session. This issue does not affect client validation of connected servers, nor expose private key information, but could result in an insecure TLS 1.3 session when not controlling both sides of the connection. wolfSSL recommends that TLS 1.3 client side users update the version of wolfSSL used. 

The weakness was published 07/18/2023. The advisory is shared for download at github.com. This vulnerability was named CVE-2023-3724 since 07/17/2023. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 212833 (CBL Mariner 2.0 Security Update: mariadb (CVE-2023-3724)), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the vulnerability database at Tenable (212833). Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

• wolfSSL

Version

• 1.3

License

• open-source

Website

• Product: https://github.com/wolfSSL/wolfssl/

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CPE 2.2info

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Once again VulDB remains the best source for vulnerability data.

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