oss-security - Re: CVE Request: ZIP Integer Overflow leads to writing past heap boundary

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Date: Mon, 23 Mar 2015 22:45:12 +0100
From: Thomas Klausner <tk@...a.or.at>
To: oss-security@...ts.openwall.com
Cc: Timo Warns <Timo.Warns@...il.com>
Subject: Re: CVE Request: ZIP Integer Overflow leads to
 writing past heap boundary

On Thu, Mar 19, 2015 at 08:31:14AM +1300, Emmanuel Law wrote:
> Yup we realised that and notified libzip.
> On 19/03/2015 8:05 am, "Timo Warns" <Timo.Warns@...il.com> wrote:
> 
> > On 2015-03-18, Emmanuel Law wrote:
> > > found an integer overflow in PHP. When processing a malform zip file with
> > > many entires, it leads to a heap overflow.
> > >
> > > Affected Version <= PHP 5.6.6
> > > Bug Report: https://bugs.php.net/bug.php?id=69253
> > > Patch:
> > >
> > https://github.com/php/php-src/commit/ef8fc4b53d92fbfcd8ef1abbd6f2f5fe2c4a11e5
> >
> > This looks like it may also affect libzip upstream
> > (http://hg.nih.at/libzip/file/fa78ab51417f/lib/zip_dirent.c)
> >
> > Was upstream (in copy) informed about the issue?

We have since fixed this:

http://hg.nih.at/libzip/rev/9f11d54f692e

Thanks!
 Thomas

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