CVE-2018-12439

low-risk
Published 2018-06-15

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.

Do I need to act?

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0.06% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.7/10 Medium
LOCAL / HIGH complexity

Affected Products (1)

Affected Vendors

Matrixssl

References (2)

Third Party Advisory https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidd...
Third Party Advisory https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidd...
17
/ 100
low-risk
Severity 12/34 · Low
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal