CVE-2018-12439 Information disclosure in n/a

Medium 4.7 Published 15 Jun 2018 Updated 16 Sep 2024

Attackers can recover ECDSA private keys via memory-cache side-channel attacks if they have local or co-located VM access.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2018-12439?

CVE-2018-12439 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

MatrixSSL through 3.9.5 Open allows a memory-cache side-channel attack on ECDSA signatures, 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.

Weakness: CWE-200

Which versions are affected by CVE-2018-12439?

It affects 1 product.

Products include Matrixssl Matrixssl.

How do I fix CVE-2018-12439?

No fix has been published for CVE-2018-12439 yet. Limit exposure of the affected software until one is available.

Is CVE-2018-12439 being exploited?

There is no known exploitation of CVE-2018-12439 in the wild and no public exploit code.

Sources

Also known as GHSA-m4cc-wf88-c8gq.