CVEs-PoC/2018/CVE-2018-0495.md

### [CVE-2018-0495](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-0495)
![](https://img.shields.io/static/v1?label=Product&message=Libgcrypt%20before%201.7.10%20and%201.8.x%20before%201.8.3&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=side-channel%20attack&color=brighgreen)

### Description

Libgcrypt before 1.7.10 and 1.8.x before 1.8.3 allows a memory-cache side-channel attack on ECDSA signatures that can be mitigated through the use of blinding during the signing process in the _gcry_ecc_ecdsa_sign function in cipher/ecc-ecdsa.c, aka the Return Of the Hidden Number Problem or ROHNP. To discover an ECDSA key, the attacker needs access to either the local machine or a different virtual machine on the same physical host.

### POC

#### Reference
- https://usn.ubuntu.com/3689-2/
- https://usn.ubuntu.com/3692-1/

#### Github
- https://github.com/ARPSyndicate/cvemon
- https://github.com/mrodden/vyger