[Bug 1434789] [NEW] unzip in precise decypts large files made with Windows 7zip incorrectly

[jan]

Public bug reported:

I create large zip files (sources > 100 Mb) with the windows version of 7zip.
unzip in Precise ((12.04.5 LTS (GNU/Linux 3.2.0-77-generic x86_64, 3.2.0-77-generic #114-Ubuntu SMP Tue Mar 10 17:26:03 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux) yields bad output, and CRC errors when run with -t option.

This problem does not exist in other linux versions: Neither unzip on lucid ( 2.6.32-73-generic-pae #140-Ubuntu SMP Tue Feb 10 15:30:51 UTC 2015 i686 GNU/Linux)
nor on Ubuntu 14.04.1 LTS (GNU/Linux 3.13.0-44-generic x86_64,  3.13.0-44-generic #73-Ubuntu SMP Tue Dec 16 00:22:43 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux)
has this bug.

Re-zipping the same data with either linux version makes the data OK for
the precise version of zip.

The data files I use are confidential. Depending on how this bug
progresses, I might try to make a specific zip file for this cause.

Information of the unzip in precise:
UnZip 6.00 of 20 April 2009, by Debian. Original by Info-ZIP.

ls -l `which unzip`
-rwxr-xr-x 2 root root 158336 Feb 17 20:40 /usr/bin/unzip

ldd `which unzip`
	linux-vdso.so.1 =>  (0x00007fffbf7bf000)
	libbz2.so.1.0 => /lib/x86_64-linux-gnu/libbz2.so.1.0 (0x00007f1c1172f000)
	libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f1c11370000)
	/lib64/ld-linux-x86-64.so.2 (0x00007f1c1195d000)

** Affects: unzip (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1434789

Title:
  unzip in precise decypts large files made with Windows 7zip
  incorrectly

Status in unzip package in Ubuntu:
  New

Bug description:
  I create large zip files (sources > 100 Mb) with the windows version of 7zip.
  unzip in Precise ((12.04.5 LTS (GNU/Linux 3.2.0-77-generic x86_64, 3.2.0-77-generic #114-Ubuntu SMP Tue Mar 10 17:26:03 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux) yields bad output, and CRC errors when run with -t option.

  This problem does not exist in other linux versions: Neither unzip on lucid ( 2.6.32-73-generic-pae #140-Ubuntu SMP Tue Feb 10 15:30:51 UTC 2015 i686 GNU/Linux)
  nor on Ubuntu 14.04.1 LTS (GNU/Linux 3.13.0-44-generic x86_64,  3.13.0-44-generic #73-Ubuntu SMP Tue Dec 16 00:22:43 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux)
  has this bug.

  Re-zipping the same data with either linux version makes the data OK
  for the precise version of zip.

  The data files I use are confidential. Depending on how this bug
  progresses, I might try to make a specific zip file for this cause.

  Information of the unzip in precise:
  UnZip 6.00 of 20 April 2009, by Debian. Original by Info-ZIP.

  ls -l `which unzip`
  -rwxr-xr-x 2 root root 158336 Feb 17 20:40 /usr/bin/unzip

  ldd `which unzip`
  	linux-vdso.so.1 =>  (0x00007fffbf7bf000)
  	libbz2.so.1.0 => /lib/x86_64-linux-gnu/libbz2.so.1.0 (0x00007f1c1172f000)
  	libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f1c11370000)
  	/lib64/ld-linux-x86-64.so.2 (0x00007f1c1195d000)

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