CVE-2024-0056

Microsoft .Net Framework 4.8 – 4.8.04690.02

Published

09 January 2024

Modified

21 November 2024

Patch / advisory

View advisory

CVSS Score v3.1 8.7

Click a component to see what it means

Raw vector

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

EPSS Score 0.012 67th percentile

Risk Priority 63 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2024-0056 is a high-severity Cleartext Transmission of Sensitive Information (CWE-319) vulnerability in Microsoft .Net Framework. Its CVSS base score is 8.7 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Network Sniffing (T1040); ranked in the top 33% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SC-8 (Transmission Confidentiality and Integrity) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2024-0311

Vulnerability Data

Microsoft.Data.SqlClient and System.Data.SqlClient SQL Data Provider Security Feature Bypass Vulnerability

CWE(s): CWE-319 NVD-CWE-noinfo

Related Threats

MITRE ATT&CK Enterprise Techniques

T1040 Network Sniffing Credential Access

Adversaries may passively sniff network traffic to capture information about an environment, including authentication material passed over the network.

attack.mitre.org →

T1003.004 LSA Secrets Credential Access

Adversaries with SYSTEM access to a host may attempt to access Local Security Authority (LSA) secrets, which can contain a variety of different credential materials, such as credentials for service accounts.

attack.mitre.org →

T1003.008 /etc/passwd and /etc/shadow Credential Access

Adversaries may attempt to dump the contents of <code>/etc/passwd</code> and <code>/etc/shadow</code> to enable offline password cracking.

attack.mitre.org →

T1006 Direct Volume Access Stealth

Adversaries may directly access a volume to bypass file access controls and file system monitoring.

attack.mitre.org →

T1007 System Service Discovery Discovery

Adversaries may try to gather information about registered local system services.

attack.mitre.org →

T1010 Application Window Discovery Discovery

Adversaries may attempt to get a listing of open application windows.

attack.mitre.org →

Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2024-21406Same product: Microsoft Windows 10 1607

CVE-2026-34346Same product: Microsoft Windows 10 1607

CVE-2025-53139Same product: Microsoft Windows 10 21H2

CVE-2024-38167Same product: Microsoft .Net

CVE-2026-23661Same vendor: Microsoft

CVE-2024-38081Same product: Microsoft .Net

CVE-2024-21409Same product: Microsoft .Net

CVE-2024-0057Same product: Microsoft .Net

CVE-2024-29059Same product: Microsoft .Net Framework

CVE-2023-36049Same product: Microsoft .Net

Affected Assets

microsoft

microsoft.data.sqlclient

2.1 — 2.1.7 · 3.1 — 3.1.5 · 4.0 — 4.0.5

microsoft

sql server

2022

microsoft

system.data.sqlclient

≤ 4.8.6

microsoft

visual studio 2022

17.2 — 17.2.23 · 17.4 — 17.4.15 · 17.6 — 17.6.11

microsoft

.net framework

2.0, 3.5, 4.6.2, 4.7, 4.7.1 · 4.8 — 4.8.04690.02 · 4.8 — 4.8.04690.01 · 4.8 — 4.8.04690.02

microsoft

.net

8.0.0 · 6.0.0 — 6.0.26 · 7.0.0 — 7.0.15

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SC-8 Transmission Confidentiality and Integrity good match

SC-8 directly requires protecting confidentiality of transmitted information, which structurally eliminates cleartext transmission of sensitive data.

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.DS-02 partial match

blocks

Encryption of data-in-transit directly prevents cleartext transmission while the control also addresses integrity and availability.

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.5.14 Information transfer partial match

blocks

Mandating cryptographic protection and stronger authentication on public networks stops the transmission of plaintext sensitive information.

A.5.15 Access control partial match

removes

A.5.16 Identity management partial match

removes

A.5.17 Authentication information partial match

removes

A.5.18 Access rights partial match

removes

A.8.10 Information deletion partial match