description: Heap out-of-bounds read in Clickhouse's LZ4 compression codec when parsing a malicious query. As part of the LZ4::decompressImpl() loop, a 16-bit unsigned user-supplied value ('offset') is read from the compressed data. The offset is later used in the length of a copy operation, without checking the lower bounds of the source of the copy operation.
problem types: CWE-125
affected:
{
vendor: yandex
product: clickhouse
versions:
version: unspecified, status: affected, lessThan: 21.10.2.15-stable, versionType: custom
}