php.net |  support |  documentation |  report a bug |  advanced search |  search howto |  statistics |  random bug |  login

go to bug id or search bugs for

Bug #68902 Use after free in ext/opcache/zend_persist.c
Submitted: 2015-01-24 18:58 UTC Modified: 2015-01-25 23:28 UTC
From: bugreports at internot dot info Assigned:
Status: Not a bug Package: opcache
PHP Version: 5.5.21 OS: Linux Ubuntu 14.04
Private report: No CVE-ID: None
View Developer Edit
Welcome back! If you're the original bug submitter, here's where you can edit the bug or add additional notes.
If you forgot your password, you can retrieve your password here.
Password:
Status:
Package:
Bug Type:
Summary:
From: bugreports at internot dot info
New email:
PHP Version: OS:

 

 [2015-01-24 18:58 UTC] bugreports at internot dot info 
Description:
------------
Hi,

In     /ext/opcache/zend_persist.c:

239                        efree(orig_literals);


but then it is used in multiple places:

255                                opline->op1.zv = (zval*)((char*)opline->op1.zv + ((char*)op_array->literals - (char*)orig_literals));

.
263                                opline->op2.zv = (zval*)((char*)opline->op2.zv + ((char*)op_array->literals - (char*)orig_literals));

Patches

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2015-01-24 23:49 UTC] stas@php.net
-Summary: Use after free +Summary: Use after free in ext/opcache/zend_persist.c -Status: Open +Status: Not a bug -Type: Security +Type: Bug
 [2015-01-24 23:49 UTC] stas@php.net 
I do not see dereferencing this pointer in any of these places.
 [2015-01-25 23:28 UTC] bugreports at internot dot info 
232                        orig_literals = op_array->literals;

?
 [2015-02-02 23:55 UTC] a at b dot c dot de 
And then see the line immediately after that....

    op_array->literals = p;
 
PHP Copyright © 2001-2024 The PHP Group
All rights reserved. 		Last updated: Sun Dec 22 11:01:30 2024 UTC