description: Heap buffer overflow in Clickhouse's LZ4 compression codec when parsing a malicious query. There is no verification that the copy operations in the LZ4::decompressImpl loop and especially the arbitrary copy operation wildCopy<copy_amount>(op, ip, copy_end), don’t exceed the destination buffer’s limits.
problem types: CWE-122
affected:
{
vendor: yandex
product: clickhouse
versions:
version: unspecified, status: affected, lessThan: 21.10.2.15-stable, versionType: custom
}