cve/2013/CVE-2013-2061.md

### [CVE-2013-2061](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-2061)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

The openvpn_decrypt function in crypto.c in OpenVPN 2.3.0 and earlier, when running in UDP mode, allows remote attackers to obtain sensitive information via a timing attack involving an HMAC comparison function that does not run in constant time and a padding oracle attack on the CBC mode cipher.

### POC

#### Reference
- https://community.openvpn.net/openvpn/wiki/SecurityAnnouncement-f375aa67cc

#### Github
No PoCs found on GitHub currently.