UltraISO
UltraISO is a crippleware application for Microsoft Windows for creating, modifying and converting ISO image files used for optical disc authoring, currently being produced by EZB Systems.
 | |
 A screenshot of UltraISO | |
| Developer(s) | EZB Systems |
|---|---|
| Initial release | April 20, 2002 |
| Stable release | 9.76
/ 7 August 2021[1] |
| Operating system | Microsoft Windows |
| Platform | IA-32 and x86-64 |
| Type | Optical disc authoring software and virtual drive |
| License | Commercial |
| Website | www |
Initially UltraISO was shareware however since 2006 it has turned into commercial software.[2] The 'Free Trial' version is limited to ISO images of 300 MB or less, effectively making it Crippleware.[3]
ISZ format
UltraISO uses a proprietary format known as ISZ. The format is advertised as "ISO Zipped", even though it is not a simple zip archive. The format uses zlib or bzip2 to compress the data, and may use AES-128,192 or 256 encryption in the CBC mode[4] (note that this provides no integrity protection and is vulnerable to the padding oracle attack[5]). The file format specification is available publicly on EZB Systems's website.[4] The format is now supported by third party applications such as Daemon Tools, Alcohol 120% and CDemu.
References
- "UltraISO Revision History".
- "Order UltraISO - EZB Systems, Inc".
- "ISO Images Editing Made Easier". 27 June 2006.
- "ISZ File Format Specification". EZB Systems. 2006-07-03. Retrieved 2008-09-24.
- "CBC decryption vulnerability". Microsoft docs. Retrieved 29 Jan 2022.