[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Date: Tue, 16 Jul 2013 11:37:41 -0600
From: Kurt Seifried <kseifried@...hat.com>
To: oss-security@...ts.openwall.com
CC: Matthew Wilkes <matt@...distillery.eu>
Subject: Re: CVE Request - PloneFormGen, multiple vulnerabilities
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
On 07/04/2013 02:54 PM, Matthew Wilkes wrote:
> Hello all,
>
> I'd like to request some CVE identifiers for the following
> vulnerabilities, recently patched in PloneFormGen[1]
>
> Here are some descriptions of the vulnerabilities, along with the
> CVSSv2 base score we calculated, and our determination of the
> relevant CWE identifiers. We're not sure about potential merges,
> especially as there are two pairs of very similar attacks.
>
>
> # Execute arbitrary shell commands **CVSSv2 base score**: 10
>
> CWE-78 - Improper Neutralisation of Special Elements used in an OS
> Command CWE-573 - Improper Following of Specification by Caller
> CWE-749 - Exposed dangerous method or function
>
> Passing a urlencoded shell command to a support function that is
> accessible through the web causes that shell command to be run with
> the same privileges as the Zope server.
>
>
>
> # Set custom script body **CVSSv2 base score**: 8.2 CWE-306 -
> Missing authentication for critical resource CWE-749 - Exposed
> dangerous method or function
>
> When using a custom script action adapter, it is possible for
> anonymous users to overwrite the content of the script. This allows
> an attacker complete control over what happens to the received
> data. The script is executed within Zope's RestrictedPython
> environment, however, so it doesn't allow escape from the process
> sandbox.
>
>
>
> # Can set body of mail template on mailer object **CVSSv2 base
> score**: 7.5 CWE-863 - Incorrect authorization CWE-749 - Exposed
> dangerous method or function
>
> An unused method has a declarePublic call, allowing anyone to
> invoke it. This allows any PloneFormGen form with a mailer object
> to have the email template modified by anonymous users. As the
> template is a ZPT object it can include inline Python expressions
> evaluated in the process sandbox.
>
>
>
> # Insufficient CSRF protection on SaveData adapter allows changing
> data **CVSSv2 base score**: 6.3 CWE-352 - Cross-site request
> forgery (CSRF) CWE-749 - Exposed dangerous method or function
>
> If a privileged user is tricked into accessing an attacker
> controlled URL, it is possible to craft a request which would allow
> setting the saved data to any value, thus compromising the
> integrity of the data.
>
>
>
> # Can determine the success page without filling in form **CVSSv2
> base score**: 5 CWE-767 - Access to critical private variable via
> public method
>
> Often this is just a thank you page, however it is used by some
> users to expose access to a private URL or further logic. In this
> case it *may* provide an attacker with access to sensitive
> information.
>
>
>
> # Render body of mail template on mailer object **CVSSv2 base
> score**: 5 CWE-767 - Access to critical private variable via public
> method
>
> Like the above attack, this allows users who have not filled in a
> form to see the email they would have received if they had. It
> stacks with the set body vulnerability to allow the attacker to
> execute Python embedded in the custom template.
>
>
>
> # Run ScriptAdapter script without submitting form **CVSSv2 base
> score**: 5 (???) CWE-767 - Access to critical private variable via
> public method
>
> As above, but with the set custom script body vulnerability. The
> effect of running the script varies by deployment.
>
>
>
> # Can add spurious blank records to SaveDataAdapter **CVSSv2 base
> score**: 5 CWE-306 - Missing authentication for critical resource
> CWE-20 - Improper input validation CWE-749 - Exposed dangerous
> method or function
>
> When using the default action adapter for saving data, it's
> possible to create blank, likely invalid records. A malicious user
> could automate this to add many invalid responses.
>
>
>
> # Can enable or disable form actions **CVSSv2 base score**: 4.3
> CWE-306 - Missing authentication for critical resource CWE-352 -
> Cross-site request forgery
>
> If the ids of the action adapters within a form are known, it is
> possible to disable or enable them as an anonymous user. This would
> allow an attacker to effectively disable the form, or to redirect
> input.
>
>
>
> # Vector for determining user details in XSS attacks **CVSSv2 base
> score**: 3.5 (???) CWE-352 - Cross-site request forgery CWE-359 -
> Privacy violation
>
> Multiple methods are exposed which allow determination of the
> email address, name and id of the currently authenticated member in
> custom script adapters. If an attacker were already performing a
> cross site scripting vulnerability elsewhere on the domain, these
> methods could be used to identify users and leak sensitive
> information.
>
>
>
> All but 'Insufficient CSRF protection on SaveData adapter allows
> changing data' have official fixes; that one is unpatched.
> Disclosure of reproducers has only been to the maintainer at this
> stage, but happen more widely sometime in the next few weeks.
> Credits for all the vulnerabilities go to The Code Distillery
>
> Kurt, or whoever assigns the CVEs for this, I'm happy to provide
> more information if you need it.
>
> Thanks,
>
> Matthew Wilkes
>
> [1] -
> http://plone.org/products/plone/security/advisories/ploneformgen-vulnerability-requires-immediate-upgrade
>
>
>
>
> ------ http://thedistillery.eu. The Code Distillery Ltd. Is
> registered in England & Wales (#7747893). Registered address
> 145-157 St John Street, London, EC1V 4PW.
>
Sorry thought i had replied to this. I need links to the code
commits/vuln code so I can confirm these.
To reiterate: so I can confirm CVE assignments, and prevent duplicate
assignments you *MUST* provide links to the code commits/vulnerable
code. I don't have the time to go hunting through your source code for
them. People need to start making better CVE requests, or you're not
going to get CVEs from me.
- --
Kurt Seifried Red Hat Security Response Team (SRT)
PGP: 0x5E267993 A90B F995 7350 148F 66BF 7554 160D 4553 5E26 7993
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.13 (GNU/Linux)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=h+BX
-----END PGP SIGNATURE-----
Powered by blists - more mailing lists
Please check out the
Open Source Software Security Wiki, which is counterpart to this
mailing list.
Confused about mailing lists and their use?
Read about mailing lists on Wikipedia
and check out these
guidelines on proper formatting of your messages.
