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Last updated: 10/23/2014 2:56:12 AM

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National Cyber Awareness System

Vulnerability Summary for CVE-2009-4049

Original release date: 11/23/2009
Last revised: 11/24/2009


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.


CVSS Severity (version 2.0):
CVSS v2 Base Score: 7.2 (HIGH) (AV:L/AC:L/Au:N/C:C/I:C/A:C) (legend)
Impact Subscore: 10.0
Exploitability Subscore: 3.9
CVSS Version 2 Metrics:
Access Vector: Locally exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information; Allows unauthorized modification; Allows disruption of service

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External Source: BUGTRAQ
Name: 20091114 Avast aswRdr.sys Kernel Pool Corruption and Local Privilege Escalation
External Source: MISC
Name: http://www.efblog.net/2009/11/avast-aswrdrsys-kernel-pool-corruption.html
External Source: BID
Name: 37031
External Source: SECUNIA
Name: 37368
Type: Advisory
External Source: VUPEN
Name: ADV-2009-3266
Type: Advisory
External Source: MISC
Name: https://www.evilfingers.com/advisory/Advisory/Avast_aswRdr_sys_Kernel_Pool_Corruption_and_Local_Privilege_Escalation.php

Technical Details

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