687752 - frame-poisoned crash in nsHTMLSelectElement::OnOptionSelected [V-nf9bqw2htl]

Status: RESOLVED DUPLICATE of bug 650766

(Core :: DOM: Core & HTML, defect)

Description

[Daniel Veditz [:dveditz]]

Attachment: Crashes on open (1.9.2): iDefense testcase

iDefense VCP Submission V-nf9bqw2htl
06/08/2011
Mozilla Firefox XUL Memory Corruption Vulnerability

Description: 
Remote exploitation of a memory corruption vulnerability in Mozilla Foundation's FireFox could allow an attacker to execute arbitrary code with the privileges of the current user.

The vulnerability occurs during the processing of selected option and optgroup elements. Specifically, it is possible to trigger a memory corruption vulnerability when Firefox fails to properly release an object. The object's memory is freed; however, a reference to the object remains. When the reference is later used to access the object, this now-invalid memory is treated as a valid object and the object's vtable is used to make an indirect function call. This may result in the execution of arbitrary code. 

Analysis: 
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 Web page created by an attacker. An attacker typically accomplishes this via social engineering or injecting content into compromised, trusted sites. After the user visits the malicious Web page, no further user interaction is needed.

To exploit this vulnerability, an attacker needs to be able to control the area of memory that is freed and later reused, or control the area of memory pointed to by whatever is placed there. An attacker has several methods of doing this via reallocating it or by heap spraying.

iDefense recommends configuring the affected application to use the exploitation mitigation's provided by the Microsoft EMET tool. This will not prevent exploitation, but it will make it more complex on platforms that support DEP and ASLR.

iDefense considers this vulnerability to be of HIGH severity due to the possibility of arbitrary code execution with minimal user interaction. 

Credit: 
Jose A. Vazquez of {http://spa-s3c.blogspot.com}

Comment 1

[Daniel Veditz [:dveditz]]

bp-813dd688-0fe0-4aaf-9432-9ab5a2110919
bp-0d0d2e7e-9ea3-4fff-95b3-10d7c2110919

Frame-poisoned crash. Looks like a dupe of bug 650766.