bugtraq - Re: Zip 2,31 bad default file-permissions vulnerability

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Date: Thu,  4 Aug 2005 10:53:55 +0200
From: Lupe Christoph <lupe@...e-christoph.de>
To: Imran Ghory <imranghory@...il.com>
Cc: bugtraq@...urityfocus.com
Subject: Re: Zip 2,31 bad default file-permissions vulnerability


Quoting Imran Ghory <imranghory@...il.com>:

> A zip file created by Zip 2.3.1 has the permissions 644 by default,
> Therefore any file compressed becomes world readable.

Zip 2.3 works correctly:
$ (umask 0; zip test.zip feedlist.opml; ls -l test.zip; rm test.zip)
  adding: feedlist.opml (deflated 80%)
-rw-rw-rw-    1 lupe     lupe         3156 Aug  4 10:52 test.zip
$ (umask 077; zip test.zip feedlist.opml; ls -l test.zip; rm test.zip)
  adding: feedlist.opml (deflated 80%)
-rw-------    1 lupe     lupe         3156 Aug  4 10:52 test.zip

HTH,
Lupe Christoph
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