Bug 240167 (CVE-2007-1700)

Summary: CVE-2007-1700 php session extension refcount handling issue
Product: [Other] Security Response Reporter: Joe Orton <jorton>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED WONTFIX QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: paul.boin
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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: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:

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. ***