CVE-2018-12434 Information disclosure in n/a

Medium 4.7 Published 15 Jun 2018 Updated 16 Sep 2024

Attackers with local or co-located VM access can recover private keys from DSA and ECDSA signatures via cache side-channel attacks.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2018-12434?

CVE-2018-12434 is a medium-severity vulnerability in n/a, published on 15 Jun 2018. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

LibreSSL before 2.6.5 and 2.7.x before 2.7.4 allows a memory-cache side-channel attack on DSA and ECDSA signatures, aka the Return Of the Hidden Number Problem or ROHNP. To discover a key, the attacker needs access to either the local machine or a different virtual machine on the same physical host.

Weakness: CWE-200

Which versions are affected by CVE-2018-12434?

It affects 1 product.

Products include Openbsd Libressl.

How do I fix CVE-2018-12434?

Upgrade to a fixed version.

Is CVE-2018-12434 being exploited?

There is no known exploitation of CVE-2018-12434 in the wild and no public exploit code.

Sources

Also known as GHSA-35v2-vq8r-rrr8.