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Date: Sat, 08 Jun 2013 08:16:10 -0400
From: larry Cashdollar <larry0@...com>
To: "oss-security@...ts.openwall.com" <oss-security@...ts.openwall.com>
Cc: "oss-security@...ts.openwall.com" <oss-security@...ts.openwall.com>
Subject: Re: CVE request: Debian's package "mysql-server" leaks
credential information
On Jun 8, 2013, at 7:56 AM, gremlin@...mlin.ru wrote:
> On 08-Jun-2013 07:43:21 -0400, larry Cashdollar wrote:
>
>>>> According to the bug report details that's a race condition.
>>>> A malicious user is using a vulnerability in the way the
>>>> installation script handles changing file permissions to disclose
>>>> sensitive information.
>>> Yes. And, once again, that's a misconfiguration - the file should
>>> be created as 0600 root:root during installation and only after
>>> that chmod() and chown() may be applied.
>> I'd agree if this were a configuration file we were talking about,
>> but it's an installation script.
>
> So what? The installation script may contain the `umask 077` line,
> can't it?
Yes, then their would be no bug to exploit. My assertion is that we are changing an installation script, not a configuration file. I guess you could argue that the post install script is doing the configuration however. I guess it will depend on if issues similar to this one have been assigned CVEs in the past.
Cheers.
Larry
>
> --
> Alexey V. Vissarionov aka Gremlin from Kremlin <gremlin ПРИ gremlin ТЧК ru>
> GPG key ID: 0xEF3B1FA8, keyserver: hkp://subkeys.pgp.net
> GPG key fingerprint: 8832 FE9F A791 F796 8AC9 6E4E 909D AC45 EF3B 1FA8
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