Posted: 2022-06-02

We have recently identified and confirmed a critical bug found in CloudBacko Pro / Lite / Home (v5.1.4.0 to v5.1.4.21) that affects all types of Backup Sets, where source backup data is >32MB, resulting in unrestorable v5.1.4.x data.

Not affected is restoring data from time period prior to v5.1.4.0 backup dates (ie v5.1.2.0 data is not affected).

• Affecting CloudBacko v5.1.4.0 up to v5.1.4.21 , issue that affects ANY Backup Set types where source files have raw size greater-than 32MB.
• Example, “tasks.zip” is 40MB, is affected.
• Example, “mylist.txt” is 2MB, is not affected.

• This happens in lookup (find duplicated data) logic in backup of all Backup Set types, regardless if Deduplication is ON or OFF.
• v5.1.4.0 to v5.1.4.21 will always find duplicated data from index even Deduplication is OFF. The lookup result will be wrong, hence, the file data is already corrupt.

• Unable to restore due to corrupt backup data

• CloudBacko v5.1.4.0 up to v5.1.4.21 , where Deduplication = OFF at any point during backup runs within these versions
• CloudBacko v5.1.4.0 up to v5.1.4.21 , where Deduplication = ON and Migrate Data = ENABLED (checkbox marked)
• CloudBacko v5.1.4.0 up to v5.1.4.21 , where Deduplication = ON and Migrate Data = DISABLED (checkbox unmarked)

• It is not affected. These source data isn't chunked for Deduplication.

• It depends on the conditions stated above.

• No workaround. Data must be backup again after fix is applied.

• Take immediate action to download and install latest hotfix v5.1.4.22 (or higher) via CloudBacko website (https://www.cloudbacko.com/cloudbacko-support).
• Once required minimum hotfix version is applied, the next backup job will automatically first run a PDIC to handle (remove) corrupted backup file, then reupload source backup file that was corrupted and correctly update the migrate status table.

• Stop! Do not upgrade until you contact a member our Support team for assistance with your License upgrade.