Cyber Resilience

CVE-2023-2758

Contec Conprosys Hmi System ≤ 3.5.3

Public PoC
Published
31 May 2023
Modified
21 November 2024
CVSS Score v3.1 3.7
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
EPSS Score 0.010 61th percentile
Risk Priority 35 floored blend · peak EPSS

Summary

CVE-2023-2758 is a low-severity Improper Control of Interaction Frequency (CWE-799) vulnerability in Contec Conprosys Hmi System. Its CVSS base score is 3.7 (Low).

Operationally, exploitation aligns with the MITRE ATT&CK technique Brute Force (T1110); ranked in the top 39% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

OWASP Top 10 for Web (2025)

A06:2025 Insecure Design

EU & UK References

Vulnerability Data

A denial of service vulnerability exists in Contec CONPROSYS HMI System versions 3.5.2 and prior. When there is a time-zone mismatch in certain configuration files, a remote, unauthenticated attacker may deny logins for an extended period of time.

CWE(s)
CWE-799NVD-CWE-Other

Related Threats

MITRE ATT&CK Enterprise Techniques

T1110 Brute Force Credential Access
Adversaries may use brute force techniques to gain access to accounts when passwords are unknown or when password hashes are obtained.
attack.mitre.org →
T1499.002 Service Exhaustion Flood Impact
Adversaries may target the different network services provided by systems to conduct a denial of service (DoS).
attack.mitre.org →
T1499.003 Application Exhaustion Flood Impact
Adversaries may target resource intensive features of applications to cause a denial of service (DoS), denying availability to those applications.
attack.mitre.org →
T1667 Email Bombing Impact
Adversaries may flood targeted email addresses with an overwhelming volume of messages.
attack.mitre.org →
T1110.001 Password Guessing Credential Access
Adversaries with no prior knowledge of legitimate credentials within the system or environment may guess passwords to attempt access to accounts.
attack.mitre.org →
T1110.003 Password Spraying Credential Access
Adversaries may use a single or small list of commonly used passwords against many different accounts to attempt to acquire valid account credentials.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2023-28657Same product: Contec Conprosys Hmi System
CVE-2025-34080Same product: Contec Conprosys Hmi System
CVE-2023-28399Same product: Contec Conprosys Hmi System
CVE-2023-22334Same product: Contec Conprosys Hmi System
CVE-2023-22339Same product: Contec Conprosys Hmi System
CVE-2023-29154Same product: Contec Conprosys Hmi System
CVE-2025-34081Same product: Contec Conprosys Hmi System
CVE-2023-28824Same product: Contec Conprosys Hmi System
CVE-2023-22331Same product: Contec Conprosys Hmi System
CVE-2022-44456Same product: Contec Conprosys Hmi System

Affected Assets

contec
conprosys hmi system
≤ 3.5.3

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

PL-6 Security-related Activity Planning
addresses: CWE-799

The control requires defining frequency, timing, and approval for security interactions, directly addressing uncontrolled interaction rates.

SC-6 Resource Availability
addresses: CWE-799

Allocation policies inherently restrict interaction frequency, reducing the impact of excessive requests.

SI-8 Spam Protection
addresses: CWE-799

Spam protection explicitly controls interaction frequency by detecting and acting on bulk unsolicited messages from external sources.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.IR-01 partial match
prevents

Protecting networks from unauthorized usage can incorporate rate limiting to bound interaction frequency.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.20 Networks security partial match
mitigates

Network security controls can enforce rate limiting and throttling at the perimeter.

A.8.26 Application security requirements partial match
prevents

Application security requirements explicitly include controls on interaction frequency and throttling.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture principles recommend rate-limiting and resource-management mechanisms.

A.8.28 Secure coding partial match
prevents

Secure coding practices can embed input-frequency and throttling checks in code.

A.8.6 Capacity management partial match
degrades

Capacity management directly limits request rates and resource exhaustion that CWE-799 describes.

References