CVE-2018-12439

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.

Category

4.7
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.06%
Third-Party Advisory nccgroup.trust
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/ third party advisory

Frequently Asked Questions

What is the severity of CVE-2018-12439?
CVE-2018-12439 has been scored as a medium severity vulnerability.
How to fix CVE-2018-12439?
To fix CVE-2018-12439, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-12439 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2018-12439 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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