Edgeless Systems Contrast up to 1.12.0 Secure Persistent Volume Feature missing encryption

Summaryinfo

A vulnerability was found in Edgeless Systems Contrast up to 1.12.0. It has been declared as problematic. This issue affects some unknown processing of the component Secure Persistent Volume Feature. The manipulation results in missing encryption. This vulnerability is identified as CVE-2025-71422. The attack is only possible with local access. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Edgeless Systems Contrast up to 1.12.0. It has been classified as problematic. Affected is some unknown processing of the component Secure Persistent Volume Feature. The manipulation with an unknown input leads to a missing encryption vulnerability. CWE is classifying the issue as CWE-311. The product does not encrypt sensitive or critical information before storage or transmission. This is going to have an impact on confidentiality. CVE summarizes:

Contrast is a Kubernetes runtime for confidential containers. In versions before 1.12.1, the secure persistent volume feature is vulnerable to a malicious host supplying a crafted LUKS2 volume to a pod VM. LUKS2 volume metadata is not authenticated and, with cryptsetup versions prior to 2.8.1, a header specifying the null keyslot encryption algorithm (cipher_null-ecb) is accepted without error. Because the Contrast Initializer assumes a device is protected if `cryptsetup open` succeeds with the secret seed, the guest will open the attacker-supplied volume and write secret data in plaintext, or under a volume key known to the attacker, allowing the host to read confidential data that should have been encrypted. Contrast v1.12.1 ships cryptsetup 2.8.1, which disables null ciphers in keyslots when the passphrase is non-empty; v1.13.0 adds detached-header validation in guest memory and integrity protection for secure persistent storage. Contrast persistent volumes were not integrity protected, so integrity impact is not considered.

The advisory is available at github.com. This vulnerability is traded as CVE-2025-71422 since 09/27/2026. The exploitability is told to be difficult. Local access is required to approach this attack. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1600 by the MITRE ATT&CK project.

Upgrading to version 1.12.1 eliminates this vulnerability.

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Productinfo

Vendor

• Edgeless Systems

Name

• Contrast

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12.0

CPE 2.3info

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CPE 2.2info

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