cve/2023/CVE-2023-27536.md

### [CVE-2023-27536](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-27536)
![](https://img.shields.io/static/v1?label=Product&message=https%3A%2F%2Fgithub.com%2Fcurl%2Fcurl&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Authentication%20Bypass%20by%20Primary%20Weakness%20(CWE-305)&color=brighgreen)

### Description

An authentication bypass vulnerability exists libcurl <8.0.0 in the connection reuse feature which can reuse previously established connections with incorrect user permissions due to a failure to check for changes in the CURLOPT_GSSAPI_DELEGATION option. This vulnerability affects krb5/kerberos/negotiate/GSSAPI transfers and could potentially result in unauthorized access to sensitive information. The safest option is to not reuse connections if the CURLOPT_GSSAPI_DELEGATION option has been changed.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/1g-v/DevSec_Docker_lab
- https://github.com/L-ivan7/-.-DevSec_Docker
- https://github.com/fkie-cad/nvd-json-data-feeds
- https://github.com/fokypoky/places-list