Vulnerability CVE-2009-4049
Published: 2009-11-23   Modified: 2012-02-13

Description:
Heap-based buffer overflow in aswRdr.sys (aka the TDI RDR driver) in avast! Home and Professional 4.8.1356.0 allows local users to cause a denial of service (memory corruption) or possibly gain privileges via crafted arguments to IOCTL 0x80002024.

See advisories in our WLB2 database:
Topic
Author
Date
High
Avast aswRdr.sys Kernel Pool Corruption and Local Privilege Escalation
Bonfa
24.11.2009

Type:

CWE-119

 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

CVSS2 => (AV:L/AC:L/Au:N/C:C/I:C/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.2/10
10/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Complete
Complete
Complete
Affected software
Avast -> Avast antivirus home 
Avast -> Avast antivirus professional 

 References:
http://www.efblog.net/2009/11/avast-aswrdrsys-kernel-pool-corruption.html
http://www.securityfocus.com/archive/1/507891/100/0/threaded
http://www.securityfocus.com/bid/37031
http://www.vupen.com/english/advisories/2009/3266
https://www.evilfingers.com/advisory/Advisory/Avast_aswRdr_sys_Kernel_Pool_Corruption_and_Local_Privilege_Escalation.php
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