mail bomb

[Ingo Klöcker]

On Sonntag, 17. April 2022 11:55:55 CEST Ian Douglas wrote:
> Trying to move my life from old PC to new PC, but trouble with mail ...
> 
> After exporting with mail exporter:
> 
> ~/Documents/mailtest/mails/akonadi_maildir_resource_0 $ unzip -t mail.zip
> Archive:  mail.zip
> warning [mail.zip]:  4294967296 extra bytes at beginning or within zipfile
>   (attempting to process anyway)
> file #1:  bad zipfile offset (local header sig):  4294967296
>   (attempting to re-compensate)
>     testing: .Gmail.directory/Sent/cur/5546881_r0:2,S   OK
> error: not enough memory for bomb detection
> error: invalid zip file with overlapped components (possible zip bomb)
> 
> UnZip 6.00 of 20 April 2009, by Info-ZIP.  Maintained by C. Spieler.
> 
> Please advise. This issue was also in previous version of Kmail (month or 2
> back).

How big is the mail.zip file? If it is larger than 4 GiB, then I guess you are 
hitting the 32-bit boundary of unzip 6.00. You need a 64-bit unzip program for 
unpacking zip files that are larger than 4 GiB.

Regards,
Ingo
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