Bug 1339590 (CVE-2016-5093)

Summary: CVE-2016-5093 php: improper nul termination leading to out-of-bounds read in get_icu_value_internal
Product: [Other] Security Response Reporter: Adam Mariš <amaris>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: abhgupta, dmcphers, fedora, hhorak, jialiu, jokerman, jorton, kseifried, lmeyer, mmccomas, rcollet, tiwillia, webstack-team
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: php 5.5.36, php 5.6.22, php 7.0.7 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2016-06-07 12:58:12 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On: 1339950    
Bug Blocks: 1339953    

Description Adam Mariš 2016-05-25 11:57:03 UTC
An out-of-bounds read vulnerability was found in get_icu_value_internal causes leakage of heap memory because of missing null character at the end of zend_string.

Upstream bug:

https://bugs.php.net/bug.php?id=72241

Upstream patch:

https://git.php.net/?p=php-src.git;a=commit;h=97eff7eb57fc2320c267a949cffd622c38712484

CVE request:

http://seclists.org/oss-sec/2016/q2/404

Comment 1 Adam Mariš 2016-05-26 09:08:24 UTC
Created php tracking bugs for this issue:

Affects: fedora-all [bug 1339950]

Comment 2 Fedora Update System 2016-05-29 22:21:27 UTC
php-5.6.22-1.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.

Comment 3 Fedora Update System 2016-05-30 21:20:52 UTC
php-5.6.22-1.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.

Comment 4 Fedora Update System 2016-06-03 15:21:52 UTC
php-5.6.22-1.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.

Comment 5 Tomas Hoger 2016-06-07 12:58:12 UTC
This issue is a very limited information leak / out of bounds read, caused by a failure to nul terminate string in certain cases.  The use of term "leak" is misleading, as it's not a resource leak / failure to de-allocate memory after its effective life time.  Practically, only few bytes or memory are disclosed, unlikely to disclose sensitive information.

This issue is in the intl (Internationalization) extension.  In Red Hat products, this extension is packaged separately in php-intl sub-RPM.  Systems without that package installed can not be affected by this issue.

Comment 6 errata-xmlrpc 2016-11-15 11:53:06 UTC
This issue has been addressed in the following products:

  Red Hat Software Collections for Red Hat Enterprise Linux 6
  Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7
  Red Hat Software Collections for Red Hat Enterprise Linux 7.2 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUS

Via RHSA-2016:2750 https://rhn.redhat.com/errata/RHSA-2016-2750.html