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Re: CVE request: Fwd: [Full-disclosure] SEC Consult SA-20121017-0 :: ModSecurity multipart/invalid part ruleset bypass
From: Kurt Seifried <kseifried () redhat com>
Date: Thu, 18 Oct 2012 13:13:55 -0600

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On 10/18/2012 06:41 AM, Breno Silva wrote:
Hello Jan,

Yes i can confirm the issue and the patch.

Thanks

Breno

On Thu, Oct 18, 2012 at 3:58 AM, Jan Lieskovsky
<jlieskov () redhat com <mailto:jlieskov () redhat com>> wrote:

Hi Kurt, Breno,

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On 10/17/2012 02:47 AM, Matthias Weckbecker wrote:
Hi Steve, Kurt, vendors,

this flaw looks slightly different from the last one and 
apparently has not got a CVE yet.

----------  Forwarded Message  ----------

Subject: [Full-disclosure] SEC Consult SA-20121017-0 :: 
ModSecurity multipart/invalid part ruleset bypass Date:
Wednesday 17 October 2012 From: SEC Consult Vulnerability Lab 
<research () sec-consult com <mailto:research () sec-consult com>> To:
full-disclosure () lists grok org uk 
<mailto:full-disclosure () lists grok org uk>,
bugtraq () securityfocus com <mailto:bugtraq () securityfocus com>

SEC Consult Vulnerability Lab Security Advisory < 20121017-0 >

=======================================================================





title: ModSecurity multipart/invalid part ruleset bypass product:
ModSecurity vulnerable version: <= 2.6.8 fixed version: 2.7.0 CVE
number: - impact: Depends what you use it for homepage: 
http://www.modsecurity.org/ found: 2012-10-12 by: Bernhard
Mueller SEC Consult Vulnerability Lab
https://www.sec-consult.com

=======================================================================



Looking


through


https://www.modsecurity.org/tracker/secure/ReleaseNote.jspa?projectId=10000&version=10100



Is this https://www.modsecurity.org/tracker/browse/MODSEC-155

I am not sure this is related since it is closed with resolution 
'Cannot Reproduce'.

Yeah I was thinking they might have buried it, never thought to check
the source changelog (assumed the online one was sufficient. sigh).


Based on Changes: [1] 
http://mod-security.svn.sourceforge.net/viewvc/mod-security/m2/branches/2.7.x/CHANGES

 I would say this is: "* Added MULTIPART_INVALID_PART flag. Also
used in rule id 200002 for multipart strict"

with relevant upstream commit being: [2] 
http://mod-security.svn.sourceforge.net/viewvc/mod-security?view=revision&sortby=date&revision=2081

 but Cc-in Breno Silva to definitely confirm this yet.

Breno, could you please confirm / disprove that the patch [2] is 
upstream patch for issue: [3]
http://www.openwall.com/lists/oss-security/2012/10/17/1 ?

And if it's not the correct one, provide an explicit revision link
to the proper one?

Thank you && Regards, Jan. -- Jan iankko Lieskovsky / Red Hat
Security Response Team


Please use CVE-2012-4528 for this issue.

- -- 
Kurt Seifried Red Hat Security Response Team (SRT)
PGP: 0x5E267993 A90B F995 7350 148F 66BF 7554 160D 4553 5E26 7993

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