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NuGet package

amazon.extensions.s3.encryption

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1 actionable advisory, newest first. Withdrawn advisories and news are excluded. Coverage is partial.

  1. Medium, CVSS 6.0NuGetPublished

    Amazon S3 Encryption Client for .NET has a Key Commitment Issue

    CVE-2025-14759 · GHSA-4v42-65r3-3gjx

    Affected
    • NuGet amazon.extensions.s3.encryption < 3.2.0
    Fixed in
    3.2.0· Vendor fix available
    Issue
    S3 Encryption Client for .NET (S3EC) is an open-source client-side encryption library used to facilitate writing and reading encrypted records to S3. When the encrypted data key (EDK) is stored in an "Instruction File" instead of S3's metadata record, the EDK is exposed to an "Invisible Salamanders" attack (https://eprint.iacr.org/2019/016), which could allow the EDK to be replaced with a new key. Impact Background - Key Commitment There is a cryptographic property whereby under certain conditions, a single ciphertext can be decrypted into 2 different plaintexts by using different encryption keys. To address this issue, strong encryption schemes use what is known as "key commitment", a process by which an encrypted message can only be decrypted by one key; the key used to originally encrypt the message. In older versions of S3EC, when customers are also using a feature called "Instruction File" to store EDKs, key commitment is not implemented because multiple EDKs could be…

    Recommended action: Upgrade to 3.2.0 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.

    Sources:github.comSource checked Evidence →