Vulnerability Description
Scylla is a real-time big data database that is API-compatible with Apache Cassandra and Amazon DynamoDB. When decompressing CQL frame received from user, Scylla assumes that user-provided uncompressed length is correct. If user provides fake length, that is greater than the real one, part of decompression buffer won't be overwritten, and will be left uninitialized. This can be exploited in several ways, depending on the privileges of the user. 1. The main exploit is that an attacker with access to CQL port, but no user account, can bypass authentication, but only if there are other legitimate clients making connections to the cluster, and they use LZ4. 2. Attacker that already has a user account on the cluster can read parts of uninitialized memory, which can contain things like passwords of other users or fragments of other queries / results, which leads to authorization bypass and sensitive information disclosure. The bug has been patched in the following versions: Scylla Enterprise: 2020.1.14, 2021.1.12, 2022.1.0. Scylla Open Source: 4.6.7, 5.0.3. Users unable to upgrade should make sure none of their drivers connect to cluster using LZ4 compression, and that Scylla CQL port is behind firewall. Additionally make sure no untrusted client can connect to Scylla, by setting up authentication and applying workarounds from previous point (firewall, no lz4 compression).
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Scylladb | Scylla | < 4.6.7 |
Related Weaknesses (CWE)
References
- https://github.com/scylladb/scylla/security/advisories/GHSA-25pq-rrqm-6fmrThird Party Advisory
- https://github.com/scylladb/scylladb/commit/1c2eef384da439b0457b6d71c7e37d7268e4PatchThird Party Advisory
- https://github.com/scylladb/scylladb/issues/11476Issue TrackingPatchThird Party Advisory
- https://github.com/scylladb/scylla/security/advisories/GHSA-25pq-rrqm-6fmrThird Party Advisory
- https://github.com/scylladb/scylladb/commit/1c2eef384da439b0457b6d71c7e37d7268e4PatchThird Party Advisory
- https://github.com/scylladb/scylladb/issues/11476Issue TrackingPatchThird Party Advisory
FAQ
What is CVE-2022-29240?
CVE-2022-29240 is a vulnerability with a CVSS score of 8.1 (HIGH). Scylla is a real-time big data database that is API-compatible with Apache Cassandra and Amazon DynamoDB. When decompressing CQL frame received from user, Scylla assumes that user-provided uncompresse...
How severe is CVE-2022-29240?
CVE-2022-29240 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-29240?
Check the references section above for vendor advisories and patch information. Affected products include: Scylladb Scylla.