Bug 1336775 (CVE-2015-8873)

Summary: CVE-2015-8873 php: Stack consumption vulnerability in Zend/zend_exceptions.c
Product: [Other] Security Response Reporter: Andrej Nemec <anemec>
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, jialiu, jokerman, jorton, kseifried, lmeyer, mmaslano, mmccomas, rcollet, tiwillia, webstack-team
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: php 5.4.44, php 5.5.28, php 5.6.12 Doc Type: If docs needed, set a value
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Clone Of: Environment:
Last Closed: 2016-05-19 19:58:44 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On:    
Bug Blocks: 1336786    

Description Andrej Nemec 2016-05-17 12:34:49 UTC 
A vulnerability related to recursive method calls handling was found in php. the Tnumber of nested calls a method could perform to itself doesn't seem to be limited, causing an infinite recursion that would result in invalid memory read access due to stack exhaustion.

Upstream bug:

https://bugs.php.net/bug.php?id=69793

Upstream fix:

http://git.php.net/?p=php-src.git;a=commit;h=4d2278143a08b7522de9471d0f014d7357c28fea
Comment 1 Tomas Hoger 2016-05-19 19:58:44 UTC 
This bug is triggered by a specially crafted code, or by deserialization of untrusted input.  Both of these are insecure, with worse impact that just crash this bug causes.  There is no plan to backport this fix to PHP packages in Red Hat products.
Comment 2 errata-xmlrpc 2016-11-15 11:52:25 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