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

go to bug id or search bugs for

Bug #68903 Use after free in Zend/zend_API.c
Submitted: 2015-01-24 19:08 UTC Modified: 2015-01-24 22:45 UTC
From: bugreports at internot dot info Assigned:
Status: Not a bug Package: *General Issues
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 19:08 UTC] bugreports at internot dot info 
Description:
------------
Hi,

In /Zend/zend_API.c:


3482                                property_info.name = (char*)name;

3493                        efree((char*)property_info.name);

but then:

3508        zend_hash_quick_update(&ce->properties_info, name, name_length+1, h, &property_info, sizeof(zend_property_info), NULL);
which does:

!memcmp(p->arKey, arKey, nKeyLength)

'arKey' = name.

Patches

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2015-01-24 22:45 UTC] stas@php.net
-Summary: Use after free +Summary: Use after free in Zend/zend_API.c -Status: Open +Status: Not a bug -Type: Security +Type: Bug
 [2015-01-24 22:45 UTC] stas@php.net 
The free happens only when interned_name != property_info.name, and this can not happen if IS_INTERNED(name) branch was taken earlier, since if name is interned, zend_new_interned_string_int() returns the same string - see code in zend_string.c.
 
PHP Copyright © 2001-2026 The PHP Group
All rights reserved. 		Last updated: Thu Oct 08 05:00:01 2026 UTC