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TI-2018-08931 Aliases CVE-2018-12439GHSA-m4cc-wf88-c8gq

MatrixSSL through 3.9.5 Open allows a memory-cache side-channel attack on ECDSA…

Priority LOW 21CWE-200Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-200.

Summary

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.

Why it matters now

EPSS 0.00271 19th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:matrixssl:matrixssl:*:*:*:*:*:*:*:*up to 3.9.5VulnerableMatrixssl
  • cpe:2.3:a:matrixssl:matrixssl:*:*:*:*:*:*:*:* Versions up to 3.9.5 Vulnerable ·Matrixssl

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-12439
  2. 2026-10-03 Alias added: GHSA-m4cc-wf88-c8gq

References

Advisory 1

  • TI-2022-22985 An issue in MatrixSSL 4.5.1-open and earlier leads to failure to securely check the… CVSS 3.1HIGH 7.5
  • TI-2016-05915 Heap-based buffer overflow in MatrixSSL before 3.8.6 allows remote attackers to execute… CVSS 3.0CRITICAL 9.8
  • TI-2019-10761 In MatrixSSL 3.8.3 Open through 4.2.1 Open, the DTLS server mishandles incoming network… CVSS 3.1CRITICAL 9.8
  • TI-2017-02003 Out-of-bounds write in Inside Secure MatrixSSL CVSS 3.1CRITICAL 9.8
  • TI-2017-02002 Out-of-bounds write in Inside Secure MatrixSSL CVSS 3.1CRITICAL 9.8
  • TI-2022-21609 MatrixSSL 4.0.4 through 4.5.1 has an integer overflow in matrixSslDecodeTls13. CVSS 3.1CRITICAL 9.8
See all 23 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences