Latest unzip update breaks programs dependent on unzip output

Bug #31457 reported by Radu Cornea
28
Affects Status Importance Assigned to Milestone
unzip (Ubuntu)
Fix Released
Critical
Martin Pitt

Bug Description

The latest version of unzip has a bug which moves the filename from the zip listing from last position to first. Therefore, any program that relies on parsing unzip output will fail to recognize it as a valid output. I first noticed this in mc. Example:

> unzip -v test.zip
Archive: test.zip
 Length Method Size Ratio Date Time CRC-32 Name
 -------- ------ ------- ----- ---- ---- ------ ----
 test.txt 32 Defl:N 30 6% 02-14-06 17:57 4ebb4896
 -------- ------- --- -------
      32 30 6% 1 file

> unzip -l test.zip
Archive: test.zip
  Length Date Time Name
 -------- ---- ---- ----
 test.txt 32 02-14-06 17:57
 -------- -------
       32 1 file

You can see that the headers are ok, but the 'name' field shows up where the 'length' should appear, instead of being last.
The bug was probably introduced by the change in the outputting function (from changelog):

  * unzpriv.h, Info macro:
    - Use snprintf() instead of sprintf() as inner formatting function.
    - Use fputs() instead of fprintf() as outer function to ignore leftover
      format strings which might not have been substituted in the inner
      snprintf().

Radu Cornea (raduc)
description: updated
description: updated
description: updated
Revision history for this message
Loic Pefferkorn (loic) wrote :

Confirmed.
For example, ark (kde archiver tool) can't list files inside a zip archive.

Changed in unzip:
status: Unconfirmed → Confirmed
Revision history for this message
Martin Pitt (pitti) wrote :

Sorry, I didn't notice that. Will fix ASAP.

Changed in unzip:
assignee: nobody → pitti
Revision history for this message
Martin Pitt (pitti) wrote :

 unzip (5.52-6ubuntu3) dapper; urgency=low
 .
   * Previous security update scrambled the output fields in the contents
     listing, fix that regression.

stables fixes will go out soon.

Revision history for this message
Martin Pitt (pitti) wrote :

fixed stables in USN-248-2.

Changed in unzip:
status: Confirmed → Fix Released
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