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Fwd: Kazaa file corruption
From: Russell S/nillion42 (nillion42wyoming.com)
Date: Wed Mar 05 2003 - 12:50:55 CST
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attached mail follows:
Could you post this to the vuln-dev mailing list? The address is
David Mirza Ahmad
"sabbe dhamma anatta"
8D 9A B1 33 82 3D B3 D0 40 EB AB F0 1E 67 C6 1A 26 00 57 12
On 4 Mar 2003, Bill Hendron wrote:
> Lack of file checksum in kazaa leads to the ability to
> spread corrupted files and corrupt the dowload of any file.
> By deleting(replacing with hex 00) the data from a mp3
> file and leaving the headers you can create a file
> which has identical filesize (kazaa checks filesize).
> When a kazaa user downloads a file, multiple download
> streams can be used, if a stream is created to the
> corrupted file, it will make the download useless once
> finished not readily appraent until download is complete.
> On modems and other areas where compression is used,
> this can lead to the file traveling at rapid speeds
> (greater than 20kps on a 56k modem). This could cause
> the files that are corrupted file or corrupted portions
> to spread rapdily to other users before the user has a
> chance to check the quality of the file and delete it.
> -Bill Hendron