{"id":"CVE-2009-3522","aliases":["EUVD-2009-3504","GHSA-3r45-7993-xcwr"],"status":"published","title":"Stack-based buffer overflow in aswMon2.sys in avast! Home and Professional for Windows 4.8.1351,...","description":"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.","severity":{"version":"2.0","score":7.2,"vector":"AV:L/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00947,"percentile":0.61407,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-119"],"published":"2009-10-01T16:00:00Z","modified":"2026-06-16T23:11:46Z","exploits":[{"source":"exploitdb","id":"EDB-10106","title":"Avast! 4.8.1351.0 AntiVirus - 'aswMon2.sys' Kernel Memory Corruption","type":"dos","platform":"windows","date":"2009-11-17","verified":true,"url":"https://www.exploit-db.com/exploits/10106"}],"products":[{"vendor":"avast","product":"avast_antivirus_home"},{"vendor":"avast","product":"avast_antivirus_professional"}],"references":[{"url":"http://www.securityfocus.com/bid/36507","tags":["vdb-entry","x_refsource_BID","x_transferred","Exploit"]},{"url":"http://www.securitytracker.com/id?1022940","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred"]},{"url":"http://www.securityfocus.com/archive/1/506681/100/0/threaded","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred"]},{"url":"http://secunia.com/advisories/36858","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Vendor Advisory"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/53456","tags":["vdb-entry","x_refsource_XF","x_transferred"]},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6226","tags":["vdb-entry","signature","x_refsource_OVAL","x_transferred"]},{"url":"https://www.evilfingers.com/advisory/Advisory/Avast_aswMon2.sys_kernel_memory_corruption_and_Local_Privilege_Escalation.php","tags":["x_refsource_MISC","x_transferred","Exploit"]},{"url":"http://www.vupen.com/english/advisories/2009/2761","tags":["vdb-entry","x_refsource_VUPEN","x_transferred","Vendor Advisory"]},{"url":"http://www.avast.com/eng/avast-4-home_pro-revision-history.html","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"http://osvdb.org/58402","tags":["vdb-entry","x_refsource_OSVDB","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2009-3522"},{"url":"https://github.com/advisories/GHSA-3r45-7993-xcwr"}],"sources":{"cve":[{"id":"CVE-2009-3522","description":"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.","status":"published","published":"2009-10-01T16:00:00Z","modified":"2024-08-07T06:31:10.43Z","updated_at":"2026-11-02T14:33:23.749891Z"}],"euvd":[{"id":"EUVD-2009-3504","description":"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.","status":"published","published":"2009-10-01T16:00:00Z","modified":"2024-08-07T06:31:10Z","updated_at":"2026-11-03T01:39:13.693198Z"}],"ghsa":[{"id":"GHSA-3r45-7993-xcwr","title":"Stack-based buffer overflow in aswMon2.sys in avast! Home and Professional for Windows 4.8.1351,...","description":"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.","status":"published","published":"2022-05-02T03:45:58Z","modified":"2023-01-31T05:08:47Z","cwes":["CWE-119"],"updated_at":"2026-11-02T14:49:27.100963Z"}],"nvd":[{"id":"CVE-2009-3522","description":"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.","status":"published","published":"2009-10-01T17:00:00.25Z","modified":"2026-06-16T23:11:46.357Z","cvss":[{"version":"2.0","score":7.2,"vector":"AV:L/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T14:01:37.004244Z"}]}}