Vulnerability Report

CVE-2009-3522

Title: Avast Avast Antivirus Home Auth Bypass

Auth Bypass

Proof Of Concept

PoC Available for CVE-2009-3522

CWE Category CWE-119

Published Date Oct 01, 2009

Modified Date Jun 16, 2026

Exploit Status Available

Score 7.2 CVSS v2.0

Exploit Probability (EPSS)

0.95%

Vulnerability Summary

CVE-2009-3522: Stack-based buffer overflow in aswMon2.sys in avast! Home and Professional for Windows 4.8.1351, and possibly other versions before 4.8.1356, allows local users to cause a denial of service (system crash) and possibly gain privileges via a crafted IOCTL request to IOCTL 0xb2c80018.

Impacted Vendors

avast 2

Reference Links

http://osvdb.org/58402 http://secunia.com/advisories/36858 http://www.avast.com/eng/avast-4-home_pro-revision-history.html http://www.securityfocus.com/archive/1/506681/100/0/threaded http://www.securityfocus.com/bid/36507 http://www.securitytracker.com/id?1022940 http://www.vupen.com/english/advisories/2009/2761 https://exchange.xforce.ibmcloud.com/vulnerabilities/53456 https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6226 https://www.evilfingers.com/advisory/Advisory/Avast_aswMon2.sys_kernel_memory_corruption_and_Local_Privilege_Escalation.php http://osvdb.org/58402 http://secunia.com/advisories/36858 http://www.avast.com/eng/avast-4-home_pro-revision-history.html http://www.securityfocus.com/archive/1/506681/100/0/threaded http://www.securityfocus.com/bid/36507 http://www.securitytracker.com/id?1022940 http://www.vupen.com/english/advisories/2009/2761 https://exchange.xforce.ibmcloud.com/vulnerabilities/53456 https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6226 https://www.evilfingers.com/advisory/Advisory/Avast_aswMon2.sys_kernel_memory_corruption_and_Local_Privilege_Escalation.php

CVSS v2.0

Source Entity [email protected]

Severity HIGH

7.2

Access Vector

N/A

Authentication

N/A

RAW VECTOR AV:L/AC:L/Au:N/C:C/I:C/A:C

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2009-3522 Exploits & PoCs (Proof Of Concept)

Exploit-DB https://www.exploit-db.com/exploits/10106

View Code

June 16, 2026 MODIFIED

Vulnerability data updated via NVD.

April 09, 2025 MODIFIED

Vulnerability data or affected products updated.

October 01, 2009 PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector N/A

Complexity N/A

Privileges N/A

Interaction NONE

CVSS Vector String


                                    AV:L/AC:L/Au:N/C:C/I:C/A:C

Affected Stack

No specific products linked.