Cyber Resilience

CVE-2023-32571

Dynamic-Linq Linq 1.0.7.10 – 1.2.25

Public PoC
Published
22 June 2023
Modified
21 November 2024
Patch / advisory
View advisory
CVSS Score v3.1 9.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.35 98th percentile
Risk Priority 97 floored blend · peak EPSS

Summary

CVE-2023-32571 is a critical-severity Incorrect Comparison (CWE-697) vulnerability in Dynamic-Linq Linq. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Obfuscated Files or Information (T1027); ranked in the top 2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

CVE-2023-32571 is a remote code execution vulnerability affecting Dynamic LINQ (System.Linq.Dynamic.Core) versions 1.0.7.10 through 1.2.25 prior to 1.3.0. The flaw arises when untrusted input is supplied to methods such as Where, Select, and OrderBy, which are then parsed without sufficient validation, enabling arbitrary code and command execution. The issue carries a CVSS 3.1 base score of 9.8.

An attacker with network access can supply crafted expressions to these methods in any application that accepts dynamic LINQ queries from external sources. Successful exploitation grants full confidentiality, integrity, and availability impact without requiring authentication or user interaction.

The project repository and NCC Group advisory both point to upgrading to version 1.3.0 or later as the primary remediation, which addresses the unsafe parsing behavior.

The associated EPSS score has reached a peak of 0.8049 with a current value of 0.7691, indicating sustained exploitation interest following disclosure.

EU & UK References

Vulnerability Data

Dynamic Linq 1.0.7.10 through 1.2.25 before 1.3.0 allows attackers to execute arbitrary code and commands when untrusted input to methods including Where, Select, OrderBy is parsed.

CWE(s)
CWE-697

Related Threats

MITRE ATT&CK Enterprise Techniques

T1027 Obfuscated Files or Information Stealth
Adversaries may attempt to make an executable or file difficult to discover or analyze by encrypting, encoding, or otherwise obfuscating its contents on the system or in transit.
attack.mitre.org →
T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
attack.mitre.org →
T1212 Exploitation for Credential Access Credential Access
Adversaries may exploit software vulnerabilities in an attempt to collect credentials.
attack.mitre.org →
T1548 Abuse Elevation Control Mechanism Privilege Escalation
Adversaries may circumvent mechanisms designed to control privilege elevation to gain higher-level permissions.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2024-39534Shared CWE-697
CVE-2023-23766Shared CWE-697
CVE-2025-12192Shared CWE-697
CVE-2023-46009Shared CWE-697
CVE-2023-33225Shared CWE-697
CVE-2024-24621Shared CWE-697
CVE-2023-49994Shared CWE-697
CVE-2020-5849Shared CWE-697
CVE-2024-23903Shared CWE-697
CVE-2023-28936Shared CWE-697

Affected Assets

dynamic-linq
linq
1.0.7.10 — 1.2.25

Mitigating Controls

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.PS-06 mostly match
prevents

Secure development practices directly require correct logic for security comparisons and thereby prevent this class of flaw.

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.8.29 Security testing in development and acceptance mostly match
finds

Security testing can detect incorrect comparison flaws before deployment.

A.8.25 Secure development life cycle partial match
prevents

Secure development lifecycle includes code review and testing that can catch incorrect comparison logic.

A.8.26 Application security requirements partial match
prevents

Application security requirements can mandate correct comparison logic for security decisions.

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

Secure architecture principles can require robust comparison mechanisms for access decisions.

A.8.28 Secure coding partial match
prevents

Secure coding standards directly address avoiding incorrect comparison operators and logic.

A.8.5 Secure authentication partial match
degrades

Secure authentication mechanisms rely on correct comparison of credentials or tokens.

References