Bug 240167 (CVE-2007-1700)

Summary:	CVE-2007-1700 php session extension refcount handling issue
Product:	[Other] Security Response	Reporter:	Joe Orton <jorton>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	paul.boin
Target Milestone:	---
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Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
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Clone Of:		Environment:
Last Closed:	2007-05-15 16:02:29 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:

Description Joe Orton 2007-05-15 16:01:37 UTC

Description of problem:
The session extension in PHP 4 before 4.4.5, and PHP 5 before 5.2.1, calculates
the reference count for the session variables without considering the internal
pointer from the session globals, which allows context-dependent attackers to
execute arbitrary code via a crafted string in the session_register after
unsetting HTTP_SESSION_VARS and _SESSION, which destroys the session data Hashtable.

Comment 1 Joe Orton 2007-05-15 16:02:29 UTC

The PHP interpreter does not offer a reliable "sandboxed" security layer (as
found in, say, a JVM) in which untrusted scripts can be run; any script run by
the PHP interpreter must be trusted with the privileges of the interpreter itself.

The bug described in CVE-2007-1700 can only be triggered by a script author;
since no trust boundary is crossed, this issue is not treated as security-sensitive.

Comment 2 Joe Orton 2007-05-15 16:02:41 UTC

*** Bug 239321 has been marked as a duplicate of this bug. ***