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CVE-2018-12437

19
FAUCET Score

CVE-2018-12437 is a memory-cache side-channel vulnerability, also known as ROHNP, affecting LibTomCrypt through version 1.18.1 and related products like Linaro's implementations. This medium-severity vulnerability (CVSS 4.9) allows an attacker with local or co-resident virtual machine access to potentially discover ECDSA keys due to a high impact on confidentiality. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.18.1CPE matchmatch criteria
cpe:2.3:a:libtom:libtomcrypt:*:*:*:*:*:*:*:*
<= 3.5.0CPE matchmatch criteria
cpe:2.3:o:trustedfirmware:op-tee:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.9MEDIUM

CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N

Attack Vector
PHYSICAL
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
0.5
Impact Score
4.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.54%
Probability of exploitation in next 30 days
EPSS Percentile
42.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0054 is in the 89th percentile among its peer group of 152 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2018-12437

libtomcrypt: memory-cache side-channel attack on ECDSA signatures

Jun 13, 2018

References

security.gentoo.org / glsa/202007-53
Third Party Advisory
nccgroup.trust / us/our-research/technical-advisory-return-of-the-hidden-number-problem
ExploitTechnical DescriptionThird Party Advisory