4.9

CVE-2018-12437: libtom libtomcrypt

CVSS: 4.9v3.1MediumModified
AliasesUBUNTU-CVE-2018-12437DEBIAN-CVE-2018-12437
Published 15-06-2018Last modified 05-08-2024
Open JSON

Vulnerability summary

CVE-2018-12437 is a medium (CVSS 4.9) vulnerability in libtom libtomcrypt. EPSS estimates a 0.54% chance of exploitation in the next 30 days, higher than 44.3% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
4.9/10
010
Medium · v3.1 (NVD)
EPSS score
0.54%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 1
MGASA-2018-0339

Timeline

  1. 15-06-2018
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

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 metrics

5 scores · 3 sources · 3 versions

EPSS trend

Probability

0.54%

Chance of exploitation in the next 30 days

Percentile

44%

Versus all other CVEs

30-day change

0.00 pp

From 0.54% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.54%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (nccgroup.trust)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • libtomcrypt< 1.18.2-1
Libtom1 product
Trustedfirmware1 product
Ubuntu1 product
  • libtomcrypt< 1.17-5ubuntu0.1 | < 1.17-7ubuntu0.1 | < 1.18.1-1ubuntu0.1

4 vendors · 4 products

References

6 links