Buffer overflow in Opcfoundation Local Discover Server
CVE-2021-40142
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.026 (84.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 84.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.026 · newest: 0.026 · change: 0.000
Affected products
- Opcfoundation Local Discover Server
- Siemens Simatic Net Pc — versions 14, 15, 16
- Siemens Simatic Process Historian Opc Ua Server
- Siemens Simatic Process Historian Opc Ua Server Firmware — versions 2022
- Siemens Simatic Wincc
- Siemens Simatic Wincc Runtime
- Siemens Simatic Wincc Unified Scada Runtime
- Siemens Telecontrol Server Basic — versions 3.0
Weakness classification (CWE)
References
- opcfoundation.org/security-bulletins/ (Vendor Advisory)
- files.opcfoundation.org/SecurityBulletins/OPC Foundation Security Bulletin CVE-… (Patch, Vendor Advisory)
- cert-portal.siemens.com/productcert/pdf/ssa-321292.pdf (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-40142?
- CVE-2021-40142 is a high-severity vulnerability in Opcfoundation Local Discover Server, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2021-08-27.
- How severe is CVE-2021-40142?
- High severity. CVSS v3 base score is 7.5 out of 10.