CVE-2018-12437

lowpriority · track · 20EPSS 0.005 · 45 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.54% (45th) EPSS

CVSS 1.9 · low

Is it mine?

3 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-28

LibTomCrypt through 1.18.1 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.

cvss

Technical severity, 0–10. One row per scoring source.

4.9

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 1.9–4.9

v2.01.9lowAV:L/AC:M/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 3.4 · impact 2.9

v3.14.9mediumCVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 0.5 · impact 4

v3.14.5mediumCVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-200USprimary

affected products (3)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
libtom libtomcrypt≤ 1.18.1nvdUScpe:2.3:a:libtom:libtomcrypt:*:*:*:*:*:*:*:*
trustedfirmware op-tee≤ 3.5.0nvdUScpe:2.3:o:trustedfirmware:op-tee:*:*:*:*:*:*:*:*

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2018-06-15modified 2026-06-17

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+19470 more

references (7)

External citations — patches, advisories, analysis.

scry

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