GHSA-72fp-w44g-625q Signing DynamoDB Sets when using the AWS Database Encryption SDK.
Signature validation failures occur for DynamoDB Sets marked SIGN_ONLY, causing read errors and potential denial of service for applications using the library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is GHSA-72fp-w44g-625q?
GHSA-72fp-w44g-625q is a vulnerability in software.amazon.cryptography:aws-database-encryption-sdk-dynamodb, published on 9 Nov 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Impact
This advisory addresses an issue when a DynamoDB Set attribute is marked as SIGN_ONLY in the AWS Database Encryption SDK (DB-ESDK) for DynamoDB. This also includes when a Set is part of a List or a Map.
DB-ESDK for DynamoDB supports SIGN_ONLY and ENCRYPT_AND_SIGN attribute actions. In version 3.1.0 and below, when a Set type is assigned a SIGN_ONLY attribute action, there is a chance that signature validation of the record containing a Set will fail on read, even if the Set attributes contain the same values. The probability of a failure depends on the order of the elements in the Set combined with how DynamoDB returns this data, which is undefined.
This update addresses the issue by ensuring that any Set values are canonicalized in the same order while written to DynamoDB as when read back from DynamoDB.
Patches
Fixed in version 3.1.1 We recommend all users upgrade as soon as possible.
Workarounds
None
References
For more information on how to address records with Sets marked as SIGN_ONLY written by versions 3.1.0 and below of DB-ESDK, see AWS Database Encryption SDK Decrypt with Permute
Which versions are affected by GHSA-72fp-w44g-625q?
2 open source packages ship an affected version, including software.amazon.cryptography:aws-database-encryption-sdk-dynamodb.
| Package | Affected | Fixed in |
|---|---|---|
software.amazon.cryptography:aws-database-encryption-sdk-dynamodb Maven | From 3.0.0 | 3.1.1 |
software.amazon.cryptography:aws-database-encryption-sdk-dynamodb Maven | From 3.0.0 | 3.1.1 |
How do I fix GHSA-72fp-w44g-625q?
Upgrade software.amazon.cryptography:aws-database-encryption-sdk-dynamodb to 3.1.1 or later.
Is GHSA-72fp-w44g-625q being exploited?
There is no known exploitation of GHSA-72fp-w44g-625q in the wild and no public exploit code.