CVE-2025-14759
Unknown Unknown - Not Provided

Missing Key Commitment Vulnerability in Amazon S3 .NET Encryption Client

Publication date: 2025-12-17

Last updated on: 2025-12-17

Assigner: AMZN

Description
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.

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Meta Information

Published
2025-12-17
Last Modified
2025-12-17
Generated
2026-07-07
AI Q&A
2025-12-17
EPSS Evaluated
2026-07-05
NVD
CVE-2025-14759
EUVD
EUVD-2025-203939

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
amazon s3_encryption_client 4.0.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-327 The product uses a broken or risky cryptographic algorithm or protocol.

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Executive Summary

This vulnerability involves the Amazon S3 Encryption Client for .NET, where a missing cryptographic key commitment allows a user with write access to an S3 bucket to introduce a new encrypted data key (EDK) that decrypts to different plaintext. This occurs when the encrypted data key is stored in an "instruction file" instead of S3's metadata record, potentially leading to incorrect decryption of data.

Impact Analysis

The vulnerability can impact you by allowing a user with write access to the S3 bucket to manipulate encrypted data keys, causing data to decrypt incorrectly to different plaintext. This can lead to data integrity issues and potentially unauthorized data manipulation or confusion about the actual data content.

Mitigation Strategies

To mitigate this vulnerability, upgrade the Amazon S3 Encryption Client for .NET to version 4.0.0 or later.

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