dxbjavid opened a new pull request, #3807: URL: https://github.com/apache/avro/pull/3807
decode_snappy in lang/c/src/codec.c takes the block length straight from the container file, where file_read_block_count only rejects negative values, so a snappy block of 1 to 3 bytes reaches it and the len-4 used for snappy_uncompressed_length, snappy_uncompress and the trailing CRC memcmp underflows to a huge size_t and reads out of bounds. The C++ reader in DataFile.cc already refuses len < 4 before the same subtraction, so add the matching check here. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
