2022-03-14 00:00:00
JFROG
PUBLISHED
Heap out-of-bounds read in Clickhouses 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 upper bounds of the source of the copy operation.