High

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

IdentifiersCVE-2024-0056CWE-319· Cleartext Transmission of…

CVE-2024-0056 is a security feature bypass vulnerability in the Microsoft.Data.SqlClient and System.Data.SqlClient SQL data providers. The provided content identifies it as a cleartext transmission of sensitive information issue (CWE-319) and describes it as a SQL Data Provider security feature bypass. In Siemens COMOS deployments, the issue affects installations using the COMOS Snapshots component in versions prior to 10.4.5. The underlying vulnerable components are remediated by upgrading Microsoft.Data.SqlClient to 2.1.7 or later and System.Data.SqlClient to 4.8.6 or later. Specific vulnerable functions or code paths are not provided in the available content.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation could bypass an intended security feature in the SQL data provider. The supplied advisory context further states that exploitation may lead to data infiltration. The listed CVSS v3.1 score is 8.7 with vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N, indicating potential high confidentiality and integrity impact without an availability impact.

Mitigation

If you can’t patch tonight, do this now.

If immediate patching is not possible, reduce exposure by limiting untrusted inputs and access paths to database connectivity code, enforcing least-privilege database credentials, and restricting network access to SQL endpoints through firewalling and segmentation. In ICS environments, additionally minimize network exposure, avoid direct internet accessibility for control system assets, isolate control networks from business networks, and use secure remote access methods such as updated VPN solutions.

Remediation

Patch, then assume compromise.

Upgrade Microsoft.Data.SqlClient to version 2.1.7 or later and System.Data.SqlClient to version 4.8.6 or later. In Siemens COMOS environments, update COMOS to version 10.4.5 or later where the vulnerable COMOS Snapshots-related exposure is addressed. Follow Siemens operational guidance for industrial security when deploying the update.

PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

Microsoft Corporation.Net Frameworkapplication

Microsoft CorporationData Sql Clientapplication

Microsoft CorporationMicrosoft.Data.Sqlclientapplication

Microsoft CorporationNetapplication

Microsoft CorporationSql Serverapplication

Microsoft CorporationSystem.Data.Sqlclientapplication

Microsoft CorporationVisual Studioapplication

Microsoft CorporationVisual Studio 2022application

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

3 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.

3 SOURCESView more in app

No news coverage yet. Advisories and community discussion only.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity2

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES

MITRE CVE

cve.org · CVE-2024-0056

NVD

nvd.nist.gov/vuln/detail/CVE-2024-0056

MITRE CWE · CWE-319

Cleartext Transmission of Sensitive Information

Patch

msrc.microsoft.com/update-guide/vulnerability/CVE-2024-0056