Home/CVE/In OPC Foundation Local Discovery Server (LDS) before 1.04.402.463, remote attackers can cause a denial of service (DoS)
CVE

CVE-2021-40142

In OPC Foundation Local Discovery Server (LDS) before 1.04.402.463, remote attackers can cause a denial of service (DoS)

In OPC Foundation Local Discovery Server (LDS) before 1.04.402.463, remote attackers can cause a denial of service (DoS) by sending carefully crafted messages that lead to Access of a Memory Location After the End of a Buffer.

HIGH · CVSS 7.5 EPSS 0.00499
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
▤

Affected Products & Versions

8
opcfoundation local discover server< 1.04.402.463
siemens simatic process historian opc ua server firmware< 2022
siemens simatic process historian opc ua server firmwareall versions
siemens simatic net pcall versions
siemens simatic winccall versions
siemens simatic wincc runtimeall versions
siemens simatic wincc unified scada runtimeall versions
siemens telecontrol server basicall versions
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD27 Aug 2021 · 07:15 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

2
siemens-csafSSA-321292
cisa-csafcisa-csaf-csaf_files-OT-white-2022-icsa-22-132-12
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://cert-portal.siemens.com/productcert/pdf/ssa-321292.pdfPatchThird Party Advisory
https://files.opcfoundation.org/SecurityBulletins/OPCPatchVendor Advisory
https://opcfoundation.org/security-bulletins/Vendor Advisory
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