Bug 997097 (CVE-2013-4248)

Summary:	CVE-2013-4248 php: hostname check bypassing vulnerability in SSL client
Product:	[Other] Security Response	Reporter:	Vincent Danen <vdanen>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	angelo.alvarez, bleanhar, btotty, ccoleman, dmcphers, fedora, jdetiber, jialiu, jkurik, jorton, jtriplet, lmeyer, rcollet, rpm, tkramer, webstack-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	php 5.4.18, php 5.5.2	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-12-05 09:06:03 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:	998340, 998341, 998348, 998350, 998585
Bug Blocks:	952520, 974906, 996775

Description Vincent Danen 2013-08-14 16:17:02 UTC

Similar to Ruby (CVE-2013-4073) and Python (CVE-2013-4238), PHP also suffers from how it checked the hostname's identity when handling certificates that contain hostnames with NULL bytes.  An attacker could potentially exploit this flaw to conduct man-in-the-middle attacks to spoof SSL servers. Note that to exploit this issue, an attacker would need to obtain a carefully-crafted certificate signed by an authority that the client trusts.

This has been corrected in upstream git:

http://git.php.net/?p=php-src.git;a=commit;h=dcea4ec698dcae39b7bba6f6aa08933cbfee6755
http://git.php.net/?p=php-src.git;a=commit;h=2874696a5a8d46639d261571f915c493cd875897

While PHP referenced the Ruby CVE, one has not yet been assigned to PHP (requested):

http://www.openwall.com/lists/oss-security/2013/08/14/4

Comment 1 Vincent Danen 2013-08-15 06:24:42 UTC

This was assigned CVE-2013-4248:

http://www.openwall.com/lists/oss-security/2013/08/15/3

Comment 2 Vincent Danen 2013-08-16 15:39:42 UTC

This is fixed in PHP 5.4.18:

http://www.php.net/ChangeLog-5.php#5.4.18

But they used the Ruby CVE name incorrectly.

Comment 3 Vincent Danen 2013-08-16 20:28:09 UTC

Also fixed in 5.5.2:

http://www.php.net/ChangeLog-5.php#5.5.2

Comment 5 Huzaifa S. Sidhpurwala 2013-08-19 05:16:47 UTC

Created php tracking bugs for this issue:

Affects: fedora-all [bug 998341]

Comment 11 Remi Collet 2013-08-19 09:06:16 UTC

PHP 5.3 related commits:

http://git.php.net/?p=php-src.git;a=commitdiff;h=dcea4ec698dcae39b7bba6f6aa08933cbfee6755
http://git.php.net/?p=php-src.git;a=commitdiff;h=c1c49d6e3983c9ce0b43ffe7bf6e03b809ed048b

PHP 5.4 and 5.5 related commits:

http://git.php.net/?p=php-src.git;a=commitdiff;h=2874696a5a8d46639d261571f915c493cd875897
http://git.php.net/?p=php-src.git;a=commitdiff;h=c1c49d6e3983c9ce0b43ffe7bf6e03b809ed048b

The second commit is a fix for the fix.

Comment 14 Fedora Update System 2013-08-24 00:05:31 UTC

php-5.5.3-1.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 15 Angelo Alvarez 2013-09-03 20:45:57 UTC

Any ideas when the fix for this CVE will make it into RHEL 5.9?

Comment 16 Fedora Update System 2013-09-08 23:25:47 UTC

php-5.4.19-1.fc18 has been pushed to the Fedora 18 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 18 Tomas Hoger 2013-09-25 14:03:53 UTC

Related issue is CVE-2009-3291 / bug 524228, which correct similar problem in CommonName handling, but failed to correct subjectAltName handling corrected as part of this bug / CVE.

Comment 20 errata-xmlrpc 2013-09-30 22:15:04 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2013:1307 https://rhn.redhat.com/errata/RHSA-2013-1307.html

Comment 27 errata-xmlrpc 2013-11-21 11:19:09 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2013:1615 https://rhn.redhat.com/errata/RHSA-2013-1615.html

Comment 33 Huzaifa S. Sidhpurwala 2013-12-05 09:05:24 UTC

Statement:

This issue does not affect the version of php as shipped with Red Hat Enterprise Linux 5 or the version of php54 as shipped with Red Hat Software Collections 1.