The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
Attack Complexity
Low
AC
The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required
None
PR
The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
Scope
S
An exploited vulnerability can affect resources beyond the security scope managed by the security authority that is managing the vulnerable component. This is often referred to as a 'privilege escalation,' where the attacker can use the exploited vulnerability to gain control of resources that were not intended or authorized.
Confidentiality
High
C
There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data.
Integrity
High
I
There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system.
Availability
High
A
There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.
Microsoft Internet Explorer 9 IEFRAME CMarkup..RemovePointerPos Use-After-FreeSince November I have been releasing details on all vulnerabilities I
found that I have not released before. This is the 32nd entry in the
series. This information is available in more detail on my blog at
http://blog.skylined.nl/20161214001.html. There you can find a repro
that triggered this issue in addition to the information below.
If you find these releases useful, and would like to help me make time
to continue releasing this kind of information, you can make a donation
in bitcoin to 183yyxa9s1s1f7JBpAPHPmzAQ346y91Rx5DX.
Follow me on http://twitter.com/berendjanwever for daily browser bugs.
MSIE 9 IEFRAME CMarkup..RemovePointerPos use-after-free
=======================================================
(MS13-055, CVE-2013-3143)
Synopsis
--------
A specially crafted web-page can trigger a use-after-free vulnerability
in Microsoft Internet Explorer 9. I did not investigate this
vulnerability thoroughly, so I cannot speculate on the potential impact
or exploitability.
Known affected software and attack vectors
------------------------------------------
* **Microsoft Internet Explorer 9**
An attacker would need to get a target user to open a specially
crafted web-page. Disabling JavaScript should prevent an attacker
from triggering the vulnerable code path.
Details
-------
This bug was found back when I had very little knowledge and tools to do
analysis on use-after-free bugs, so I have no details to share. ZDI
revealed that this was a use-after-free vulnerability, though their
advisory (at http://www.zerodayinitiative.com/advisories/ZDI-13-163/)
mentions an iframe, which is not in the repro I provided.
Time-line
---------
* Sometime in November 2012: This vulnerability was found through fuzzing.
* 11 November 2012: This vulnerability was submitted to EIP.
* 10 December 2012: This vulnerability was rejected by EIP.
* 12 December 2012: This vulnerability was submitted to ZDI.
* 25 January 2013: This vulnerability was acquired by ZDI.
* 15 February 2013: This vulnerability was disclosed to Microsoft by
ZDI.
* 26 July 2013: This vulnerability was address by Microsoft in MS13-055.
* 14 December 2016: Details of this vulnerability are released.
Cheers,
SkyLined
Repro.html
<!DOCTYPE html>
<html>
<script>
document.addAEventAListener("load", function (){
document.documentAElement.removeANode(true);
}, true);
document.addAEventAListener("DOMNodeARemoved", function (){
document.write("");
}, true);
</script>
<style>
</style>
<span dir="rtl">
<ruby dir="ltr">
<br/>
</ruby>
</span>
</html>
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