cve/2024/CVE-2024-20337.md

### [CVE-2024-20337](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-20337)
![](https://img.shields.io/static/v1?label=Product&message=Cisco%20Secure%20Client&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3D%204.9.00086%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Improper%20Neutralization%20of%20CRLF%20Sequences%20('CRLF%20Injection')&color=brighgreen)

### Description

A vulnerability in the SAML authentication process of Cisco Secure Client could allow an unauthenticated, remote attacker to conduct a carriage return line feed (CRLF) injection attack against a user. 

 This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by persuading a user to click a crafted link while establishing a VPN session. A successful exploit could allow the attacker to execute arbitrary script code in the browser or access sensitive, browser-based information, including a valid SAML token. The attacker could then use the token to establish a remote access VPN session with the privileges of the affected user. Individual hosts and services behind the VPN headend would still need additional credentials for successful access.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/fkie-cad/nvd-json-data-feeds
- https://github.com/nomi-sec/PoC-in-GitHub
- https://github.com/swagcraftedd/CVE-2024-20337-POC