Missing cryptographic key commitment in the Amazon S3 Encryption Client for .NET may allow a user with write access to the S3 bucket to introduce a new EDK that decrypts to different plaintext when the encrypted data key is stored in an "instruction file" instead of S3's metadata record.

To mitigate this issue, upgrade Amazon S3 Encryption Client for .NET to version 3.2.0 or later.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

Affected Vendors & Products

No data.

No data.

No data.

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://aws.amazon.com/security/security-bulletins/AWS-2025-032/ cve-icon cve-icon
https://github.com/aws/amazon-s3-encryption-client-dotnet/releases/tag/release_2025-12-17 cve-icon cve-icon
https://github.com/aws/amazon-s3-encryption-client-dotnet/security/advisories/GHSA-4v42-65r3-3gjx cve-icon cve-icon
History

Wed, 17 Dec 2025 21:15:00 +0000

Type Values Removed Values Added
Description The Amazon S3 Encryption Client for .NET is an open-source client-side encryption library used to facilitate writing and reading encrypted records to S3. Missing cryptographic key commitment in the Amazon S3 Encryption Client for .NET may allow a user with write access to the S3 bucket to introduce a new EDK that decrypts to different plaintext when the encrypted data key is stored in an "instruction file" instead of S3's metadata record. To mitigate this issue, upgrade Amazon S3 Encryption Client for .NET to version 3.2.0 or later. Missing cryptographic key commitment in the Amazon S3 Encryption Client for .NET may allow a user with write access to the S3 bucket to introduce a new EDK that decrypts to different plaintext when the encrypted data key is stored in an "instruction file" instead of S3's metadata record. To mitigate this issue, upgrade Amazon S3 Encryption Client for .NET to version 3.2.0 or later.
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 17 Dec 2025 21:00:00 +0000

Type Values Removed Values Added
Description The Amazon S3 Encryption Client for .NET is an open-source client-side encryption library used to facilitate writing and reading encrypted records to S3. Missing cryptographic key commitment in the Amazon S3 Encryption Client for .NET may allow a user with write access to the S3 bucket to introduce a new EDK that decrypts to different plaintext when the encrypted data key is stored in an "instruction file" instead of S3's metadata record. To mitigate this issue, upgrade Amazon S3 Encryption Client for .NET to version 4.0.0 or later. The Amazon S3 Encryption Client for .NET is an open-source client-side encryption library used to facilitate writing and reading encrypted records to S3. Missing cryptographic key commitment in the Amazon S3 Encryption Client for .NET may allow a user with write access to the S3 bucket to introduce a new EDK that decrypts to different plaintext when the encrypted data key is stored in an "instruction file" instead of S3's metadata record. To mitigate this issue, upgrade Amazon S3 Encryption Client for .NET to version 3.2.0 or later.

Wed, 17 Dec 2025 20:45:00 +0000

Type Values Removed Values Added
References

Wed, 17 Dec 2025 20:15:00 +0000

Type Values Removed Values Added
Description The Amazon S3 Encryption Client for .NET is an open-source client-side encryption library used to facilitate writing and reading encrypted records to S3. Missing cryptographic key commitment in the Amazon S3 Encryption Client for .NET may allow a user with write access to the S3 bucket to introduce a new EDK that decrypts to different plaintext when the encrypted data key is stored in an "instruction file" instead of S3's metadata record. To mitigate this issue, upgrade Amazon S3 Encryption Client for .NET to version 4.0.0 or later.
Weaknesses CWE-327
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N'}

cvssV4_0

{'score': 6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N'}

Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: AMZN

Published:

Updated: 2025-12-17T21:05:55.069Z

Reserved: 2025-12-16T00:24:26.089Z

Link: CVE-2025-14759

cve-icon Vulnrichment

Updated: 2025-12-17T20:36:42.579Z

cve-icon NVD

Status : Received

Published: 2025-12-17T20:15:52.773

Modified: 2025-12-17T21:15:53.110

Link: CVE-2025-14759

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses