PT-2018-11175 · Matrixssl · Matrixssl

Published 2018-06-15 · Updated 2018-08-06 · CVE-2018-12439

Positive Technologies (AI Summary)

CVSS v3.1

4.7

Medium

Base vector

AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions MatrixSSL versions prior to 3.9.6

Description The issue allows a memory-cache side-channel attack on ECDSA signatures, also known as the Return Of the Hidden Number Problem or ROHNP. An attacker can discover an ECDSA key if they have access to either the local machine or a different virtual machine on the same physical host.

Recommendations For MatrixSSL versions prior to 3.9.6, update to version 3.9.6 or later to resolve the issue. As a temporary workaround, consider restricting access to sensitive ECDSA key material to minimize the risk of exploitation.

Fix

Information Disclosure

Weakness Enumeration

CWE-200

Related Identifiers

CVE-2018-12439

Affected Products

Matrixssl

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2018-12439 · Security Note
• https://osv.dev/vulnerability/CVE-2018-12439 · Vendor Advisory
• https://nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem · Note