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

CVE-2018-0495

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/
• https://usn.ubuntu.com/3692-2/
• https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html

Github

• https://github.com/ARPSyndicate/cvemon
• https://github.com/mrodden/vyger