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avast! Home/Professional aswRdr.sys Memory Corruption Vulnerability

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Release Date:  2009-11-17    Last Update:  2009-11-26    Views:  9,384

Secunia Advisory SA37368

Where:

Local system

Impact:

Privilege escalation, DoS

Solution Status:

Vendor Patch

CVE Reference(s):

Description


A vulnerability has been discovered in avast! Home/Professional, which can be exploited by malicious, local users to cause a DoS (Denial of Service) or potentially gain escalated privileges.

The vulnerability is caused due to an error in aswRdr.sys when processing IOCTLs. This can be exploited to corrupt kernel memory via a specially crafted 0x80002024 IOCTL.

Successful exploitation may allow execution of arbitrary code with SYSTEM privileges.

The vulnerability is confirmed in avast! Home version 4.8.1356. Other versions may also be affected.


Solution:
Update to version 4.8.1367.

Provided and/or discovered by:
Independently discovered by Giuseppe 'Evilcry' Bonfa and AbdulAziz Hariri.

Original Advisory:
Avast:
http://www.avast.com/eng/avast-4-home_pro-revision-history.html

EvilFingers:
https://www.evilfingers.com/advisory/Advisory/Avast_aswRdr_sys_Kernel_Pool_Corruption_and_Local_Privilege_Escalation.php

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: avast! Home/Professional aswRdr.sys Memory Corruption Vulnerability

User Message
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eugenot

RE: avast! Home/Professional aswRdr.sys Memory Corruption Vulnerability
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