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Message-ID: <54B8941D.5040101@openwall.com>
Date: Fri, 16 Jan 2015 07:31:25 +0300
From: Alexander Cherepanov <ch3root@...nwall.com>
To: oss-security@...ts.openwall.com
Subject: Re: CVE Request: cpio -- directory traversal
On 2015-01-16 06:09, Lyndon Nerenberg wrote:
> On Jan 15, 2015, at 6:44 PM, Alexander Cherepanov wrote:
>> cpio is susceptible to a directory traversal vulnerability via symlinks.
>
> This is not a bug. It's doing exactly what you asked of it.
Could you please elaborate? Citing my email to upstream:
"--no-absolute-filenames option seems to be intended to limit extracting
contents of an archive to be strictly inside a current directory (it
guards against both absolute paths and relative paths with .. in them).
However it can be bypassed with symlinks [extracted from the archive]."
--
Alexander Cherepanov
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