Bug 741022

Summary:	php: changes to is_a() in 5.3.7 may allow arbitrary code execution with certain code [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Vincent Danen <vdanen>
Component:	php	Assignee:	Joe Orton <jorton>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	15	CC:	fedora, jorton, rpm
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Release Note
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2012-06-05 09:41:33 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	741020

Description Vincent Danen 2011-09-24 13:52:04 UTC

This is an automatically created tracking bug!  It was created to ensure
that one or more security vulnerabilities are fixed in affected Fedora
versions.

For comments that are specific to the vulnerability please use bugs filed
against "Security Response" product referenced in the "Blocks" field.

For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs

When creating a Bodhi update request, please include the bug IDs of the
respective parent bugs filed against the "Security Response" product.
Please mention CVE ids in the RPM changelog when available.

Bodhi update submission link:
https://admin.fedoraproject.org/updates/new/?type_=security&bugs=741020

Please note: this issue affects multiple supported versions of Fedora.
Only one tracking bug has been filed; please only close it when all
affected versions are fixed.


[bug automatically created by: add-tracking-bugs]

Comment 1 Remi Collet 2011-09-25 07:46:14 UTC

For security, I think this is a very low risk, as I don't think any application  use an _autoload feature without any check on input.

As the revert to php <= 5.3.6 of is_a() behaviour is an (late and hardly discussed) upstream decision, and lot of other projects are really hostile to this change, I think we can include this in a 5.3.8 update in fedora.

Some other distro choose to not publish php 5.3.8 because of this.

@Joe, your thought ?

Comment 2 Joe Orton 2011-09-28 14:45:16 UTC

My thoughts: what a mess.  You were right to be cautious about this change!

It looks like the change to revert to the old is_a behaviour has been committed upstream to the 5.3 branch (r317183) so I don't see a problem with pushing that fix in Fedora updates.  I presume that commit alone is sufficient to fix this issue?

http://svn.php.net/viewvc?view=revision&revision=317183

Comment 3 Remi Collet 2011-09-28 14:57:00 UTC

Yes this single patch is enough.
I will do it