Remote exploitation of an invalid Loader object reference vulnerability in Adobe Systems Inc.'s Flash Player could allow an attacker to execute arbitrary code with the privileges of the current user.
During the processing of a Shockwave Flash file, an object can be created, along with multiple references that point to the object. The object can be destroyed and its associated references removed. However a reference can incorrectly remain pointing to the object. The invalid object resides in uninitialized memory, which the attacker may control to gain arbitrary execution control.
Exploitation of this vulnerability results in the execution of arbitrary code with the privileges of the user viewing the web page. To exploit this vulnerability, a targeted user must load a malicious Shockware Flash file created by an attacker. An attacker typically accomplishes this via social engineering or injecting content into a compromised, trusted site.
iDefense has confirmed the existence of this vulnerability in latest Flash Player version 220.127.116.11. Previous versions may also be affected.