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GHSA-vxgg-mqx2-3w59
No affected components available
Apache Polaris accepts literal * characters in namespace and table names. When it later builds temporary S3 access policies for delegated table access, those same characters appear to be reused unescaped in S3 IAM resource patterns and s3:prefix conditions.
In S3 IAM policy matching, * is treated as a wildcard rather than as ordinary text. That means temporary credentials issued for one crafted table can match the storage path of a different table.
In private testing against Polaris 1.4.0 using Polaris' AWS S3 temporary-credential path on both MinIO and real AWS S3, credentials returned for crafted tables such as f*.t1, f*.*, *.*, and foo.* could reach other tables' S3 locations.
The confirmed behavior includes:
- reading another table's metadata control file ([Iceberg metadata JSON]);
- listing another table's exact S3 table prefix ([table prefix]);
- and, when write delegation was returned for the crafted table, creating and deleting an object under another table's exact S3 table prefix.
A control case using ordinary different names did not allow the same cross-table access.
A least-privilege AWS S3 variant was also confirmed in which the attacker principal had no Polaris permissions on the victim table and only the minimal permissions required to create and use a crafted wildcard table (namespace-scoped TABLE_CREATE and TABLE_WRITE_DATA on *). In that setup, direct Polaris access to foo.t1 remained forbidden, but the attacker could still create and load *.*, receive delegated S3 credentials, and use those credentials to list, read, create, and delete objects under foo.t1.
In Iceberg, the metadata JSON file is a control file: it tells readers which data files belong to the table, which snapshots exist, and which table version to read. So unauthorized access to it is already a meaningful confidentiality problem. The confirmed write-capable variant means the issue is not limited to disclosure.
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability. The vulnerability can affect other systems as well, not just the initial system. There is a high impact on the confidentiality of the information. There is a high impact on the integrity of the data. There is a high impact on the availability of the system.
Active exploitation in the wild has been confirmed. Immediate patching or mitigation is required.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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