What is the CVSS score of CVE-2021-20093?

CVE-2021-20093 has a CVSS 3.1 base score of 9.1 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H. EPSS exploitation probability: 33.3%.

Is there a public PoC exploit available for CVE-2021-20093?

Yes, a public proof-of-concept exploit is available for CVE-2021-20093. Prioritise patching immediately. EPSS: 33.3%.

Is there a patch available for CVE-2021-20093?

Yes, a patch is available for CVE-2021-20093. Update the affected software to the latest version immediately.

Codemeter CVE-2021-20093

CRITICAL

Out-of-bounds Read (CWE-125)

2021-06-16 vulnreport@tenable.com

Buffer Overflow Information Disclosure Codemeter Pss Cape Sicam 230 Firmware Simatic Information Server Simatic Pcs Neo Simatic Wincc Oa Simit Simulation Platform Sinec Infrastructure Network Services Sinema Remote Connect Server Simatic Process Historian

9.1

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.1 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Lifecycle Timeline

CVE Published

Jun 16, 2021 - 12:15 nvd

CRITICAL 9.1

DescriptionNVD

A buffer over-read vulnerability exists in Wibu-Systems CodeMeter versions < 7.21a. An unauthenticated remote attacker can exploit this issue to disclose heap memory contents or crash the CodeMeter Runtime Server.

AnalysisAI

A buffer over-read vulnerability exists in Wibu-Systems CodeMeter versions < 7.21a. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified as Out-of-bounds Read (CWE-125), which allows attackers to read data from memory outside the intended buffer boundaries. A buffer over-read vulnerability exists in Wibu-Systems CodeMeter versions < 7.21a. An unauthenticated remote attacker can exploit this issue to disclose heap memory contents or crash the CodeMeter Runtime Server. Affected products include: Wibu Codemeter, Siemens Pss Cape, Siemens Sicam 230 Firmware, Siemens Simatic Information Server, Siemens Simatic Pcs Neo.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Validate array indices and buffer lengths. Use memory-safe languages. Enable AddressSanitizer during testing.