What is the CVSS score of CVE-2021-40142?

CVE-2021-40142 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 2.6%.

Is there a patch available for CVE-2021-40142?

Yes, a patch is available for CVE-2021-40142. Update the affected software to the latest version immediately.

Telecontrol Server Basic CVE-2021-40142

HIGH

Buffer Overflow (CWE-119)

2021-08-27 cve@mitre.org

Buffer Overflow Denial Of Service Siemens Telecontrol Server Basic Simatic Wincc Simatic Wincc Runtime Simatic Net Pc Simatic Process Historian Opc Ua Server Firmware Local Discover Server Simatic Wincc Unified Scada Runtime Opcfoundation

7.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.5 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

CVE Published

Aug 27, 2021 - 07:15 nvd

HIGH 7.5

DescriptionNVD

AnalysisAI

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. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Buffer Overflow vulnerability could allow attackers to corrupt memory to execute arbitrary code or crash the application.

Technical ContextAI

This vulnerability is classified as Buffer Overflow (CWE-119), which allows attackers to corrupt memory to execute arbitrary code or crash the application. 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. Affected products include: Opcfoundation Local Discover Server, Siemens Simatic Process Historian Opc Ua Server Firmware, Siemens Simatic Net Pc, Siemens Simatic Wincc, Siemens Simatic Wincc Runtime. Version information: before 1.04.402.463.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Use memory-safe languages or bounds-checking. Enable ASLR, DEP/NX, stack canaries. Use safe string functions.