It is recommended to reindex any such indexes to make sure they are correct.įix float4 and float8 hash functions to produce uniform results for NaNs (Tom Lane) While it's apparently rare in the field, this case could potentially affect any index built or reindexed with the CONCURRENTLY option. ![]() As before, in installations that have enabled prepared transactions ( max_prepared_transactions > 0), it's recommended to reindex any concurrently-built indexes in case this problem occurred when they were built.Īvoid race condition that can cause backends to fail to add entries for new rows to an index being built concurrently (Noah Misch, Andrey Borodin) The previous fix for this type of problem failed to account for PREPARE TRANSACTION commands that were still in progress when CREATE INDEX CONCURRENTLY checked for them. Rows inserted by just-prepared transactions might be omitted from the new index, causing queries relying on the index to miss such rows. #After effects 13.5 element 3d 2.2 crash updateWhen applying this update, it's best to update standby servers before the primary, so that they will be ready to handle this new WAL record type if the primary happens to crash.įix CREATE INDEX CONCURRENTLY to wait for the latest prepared transactions (Andrey Borodin) Instead write a new type of WAL record at the start of the next WAL segment, informing readers that the incomplete WAL record will never be finished and must be disregarded. To fix, do not back up over a WAL segment boundary when restarting after a crash. #After effects 13.5 element 3d 2.2 crash manualThey will then see an inconsistent next segment, and will not be able to recover without manual intervention. This is problematic since standby servers may already have copies of that WAL segment. If the primary did not survive long enough to finish writing the rest of the incomplete WAL record, then the previous crash-recovery logic had it back up and overwrite WAL starting from the beginning of the incomplete WAL record. (CVE-2021-23222)įix physical replication for cases where the primary crashes after shipping a WAL segment that ends with a partial WAL record (Álvaro Herrera) The PostgreSQL Project thanks Jacob Champion for reporting this problem. That has been shown to be possible with a server vulnerable to CVE-2021-23214. A different line of attack is to exfiltrate the client's password, or other sensitive data that might be sent early in the session. This could probably be abused to inject faked responses to the client's first few queries, although other details of libpq's behavior make that harder than it sounds. Make libpq reject extraneous data after an SSL or GSS encryption handshake (Tom Lane)Ī man-in-the-middle with the ability to inject data into the TCP connection could stuff some cleartext data into the start of a supposedly encryption-protected database session. (However, a server relying on SSL certificate authentication might well not do so.) This could be abused to send faked SQL commands to the server, although that would only work if the server did not demand any authentication data. ![]() ![]() Make the server reject extraneous data after an SSL or GSS encryption handshake (Tom Lane)Ī man-in-the-middle with the ability to inject data into the TCP connection could stuff some cleartext data into the start of a supposedly encryption-protected database session.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |