CVE-2022-29240 – Uninitialized memory read in LZ4 decompression leads to authentication bypass in Scylla

https://notcve.org/view.php?id=CVE-2022-29240

15 Sep 2022 — 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... • https://github.com/scylladb/scylla/security/advisories/GHSA-25pq-rrqm-6fmr • CWE-908: Use of Uninitialized Resource •