cve/2023/CVE-2023-6936.md

### [CVE-2023-6936](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-6936)
![](https://img.shields.io/static/v1?label=Product&message=wolfSSL&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=0%3C%3D%205.6.5%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

In wolfSSL prior to 5.6.6, if callback functions are enabled (via the WOLFSSL_CALLBACKS flag), then a malicious TLS client or network attacker can trigger a buffer over-read on the heap of 5 bytes (WOLFSSL_CALLBACKS is only intended for debugging).

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/wolfSSL/Arduino-wolfSSL
- https://github.com/wolfSSL/wolfssl