External risk intelligence

CryptoPro Secure Disk Improper LUKS Validation Allows Bypassing Integrity Checks.

CVE advisorySeverity: CRITICAL (CVSS 9.1)

CVE-2025-59324

The vulnerability affects disk encryption software (CryptoPro Secure Disk) which operates at the local storage/filesystem level to protect data at rest. It is a client-side, local security mechanism not designed for network connectivity or public internet exposure.

Halo Surface Signal: 1 out of 5 — much less likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

This vulnerability impacts disk encryption software, potentially allowing file integrity checks to be bypassed if encryption is enabled. The primary concern is to confirm if this specific software is in use within our environment and, if so, to understand its precise configuration and exposure.

File integrity checks can be skipped.
Confirm software usage and exposure.
Understand if our data is at risk.

Attack Path

How an attacker could exploit the issue

An attacker could potentially bypass file integrity checks by exploiting a flaw in how CPSD CryptoPro Secure Disk handles LUKS encryption. If LUKS encryption is present, the software may skip its own security checks, allowing unauthorized access or modification of files.

No authentication or network access required.
Vulnerability triggered by LUKS encryption presence.
Risk of unauthorized file access or modification.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could affect the integrity and confidentiality of data stored on disks protected by CryptoPro Secure Disk. When LUKS encryption is present, file integrity checks are bypassed, potentially allowing unauthorized modifications or access to sensitive information when supported by the advisory.

Encrypted disk data.
Bypassed file integrity checks.
Data may be compromised.

Operational Fix

Recommended remediation, mitigation, and detection steps

The identified vulnerability in CryptoPro Secure Disk impacts the integrity of file encryption, potentially bypassing security checks if LUKS encryption is present. Ownership for addressing this issue likely resides with the platform or infrastructure teams responsible for endpoint security and data-at-rest protection. The immediate practical move is to identify all instances of the affected software, determine their reachability and criticality, and then coordinate with the relevant teams to plan remediation during the next appropriate maintenance window.

Platform and infrastructure teams own resolution.
Verify LUKS encryption and reachability.
Plan coordinated remediation actions.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is CPSD CryptoPro Secure Disk?

CryptoPro Secure Disk is security software designed to manage disk encryption, specifically for Bitlocker environments. It provides an additional layer of protection by enforcing file integrity checks to ensure that data at rest remains untampered and secure.

How does CVE-2025-59324 affect software security?

This vulnerability involves a failure in cryptographic signature validation, classified as CWE-347. Essentially, the software contains a flaw where it fails to correctly verify the integrity of data when LUKS encryption is detected. This logic error causes the program to skip its built-in security checks entirely, leaving the protected files vulnerable to unauthorized modification or access.

Do I need to be authenticated to trigger this flaw?

No. The vulnerability does not require authentication or specific network interaction to occur. The trigger condition is simply the presence of LUKS encryption on the disk handled by the software. If LUKS encryption is not in use, this specific bypass mechanism is not activated.

Is my system at risk according to Halo Surface Signal?

Halo Surface Signal indicates that this vulnerability is unlikely to be exposed via the internet. Because CryptoPro Secure Disk operates at the local storage and filesystem level to protect data, it is a client-side mechanism. Systems are primarily at risk if an attacker already has some form of access to the local environment where the disk encryption is managed.

What steps should I take to respond to this advisory?

First, conduct an inventory to identify all systems running versions of CryptoPro Secure Disk prior to 7.7.4. Once identified, confirm whether these systems utilize LUKS encryption, as that is the specific condition for this flaw. Coordinate with your infrastructure or platform security teams to schedule and apply the necessary updates to reach a non-vulnerable version.

References

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.