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CVE-2018-12439

UnknownEPSS 0.27%

Last modified

CVE-2018-12439 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 0.27% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability
0.27%

19.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
MatrixsslMatrixssl<= 3.9.5

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2018-12439?
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.
How severe is CVE-2018-12439?
Severity scoring for CVE-2018-12439 is pending analysis. The EPSS model estimates a 0.27% probability of exploitation in the next 30 days.
How do I fix CVE-2018-12439?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-12439?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST