VulnerabilityModified
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.
HIGH 7.5EPSS 2.56%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.56%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 2.56% probability · 84th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-119
- Affected
- opcfoundation/local discover server · siemens/simatic process historian opc ua server firmware · siemens/simatic net pc · siemens/simatic wincc · siemens/simatic wincc runtime · siemens/simatic wincc unified scada runtime · siemens/telecontrol server basic
- Source
- cve@mitre.org
References
- https://cert-portal.siemens.com/productcert/pdf/ssa-321292.pdfPatch, Third Party Advisory
- https://files.opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2021-40142.pdfPatch, Vendor Advisory
- https://opcfoundation.org/security-bulletins/Vendor Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-321292.pdfPatch, Third Party Advisory
- https://files.opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2021-40142.pdfPatch, Vendor Advisory
- https://opcfoundation.org/security-bulletins/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.