CyberRota Analysis
AI-GeneratedThe vulnerability affects Neo4j's Bolt protocol, where the handshake decoder mishandles an overlong capability bit mask, treating it similarly to a truncated one. This flaw allows unauthenticated clients to exploit the protocol, potentially leading to denial of service by keeping the channel open without proper handshake finalization. Organizations using Neo4j's Bolt connector should prioritize addressing this vulnerability to mitigate the risk of unauthorized access and service disruption.
Original NVD Description
Neo4j's Bolt modern handshake decoder treats an overlong capability bit mask the same way it treats a truncated bit mask. When an unauthenticated client sends a selected protocol version followed by 32 continuation bytes in the capability mask, the decoder resets the reader index and waits for more bytes instead of rejecting the protocol message and closing the channel. Because the same unread bytes remain at the front of the decoder buffer, appending a terminating byte later does not recover the connection. The decoder re-reads the same first 32 continuation bytes, returns without producing a handshake-finalization message, and leaves the channel open. This can be triggered before authentication by any client that can reach the Bolt connector.