HOMEVULNERABILITIESCVE-2009-3522
HIGHPOC

CVE-2009-3522

CWE-119Published: October 1, 2009· Updated: Jun 16, 2026

7.2
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2009-3522 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A proof-of-concept (PoC) exploit exists for CVE-2009-3522. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.

From a weakness classification perspective (CWE-119): Buffer overflow vulnerabilities can lead to arbitrary code execution or denial of service by corrupting adjacent memory.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityC
IntegrityC
AvailabilityC
AV:L/AC:L/Au:N/C:C/I:C/A:C

Affected Vendors & Products

avast2 product(s)
avast antivirus homeavast antivirus professional
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

POC AVAILABLEProof-of-concept code exists
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://secunia.com/advisories/36858
ADVISORYhttp://www.avast.com/eng/avast-4-home_pro-revision-history.html
ADVISORYhttp://www.vupen.com/english/advisories/2009/2761
ADVISORYhttp://secunia.com/advisories/36858
ADVISORYhttp://www.avast.com/eng/avast-4-home_pro-revision-history.html
ADVISORYhttp://www.vupen.com/english/advisories/2009/2761

All References (20)

→
http://osvdb.org/58402
→
http://secunia.com/advisories/36858Vendor Advisory
→
http://www.avast.com/eng/avast-4-home_pro-revision-history.htmlVendor Advisory
→
http://www.securityfocus.com/archive/1/506681/100/0/threaded
→
http://www.securityfocus.com/bid/36507Exploit
→
http://www.securitytracker.com/id?1022940
→
http://www.vupen.com/english/advisories/2009/2761Vendor Advisory
→
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.phpExploit
→
http://osvdb.org/58402
→
http://secunia.com/advisories/36858Vendor Advisory
→
http://www.avast.com/eng/avast-4-home_pro-revision-history.htmlVendor Advisory
→
http://www.securityfocus.com/archive/1/506681/100/0/threaded
→
http://www.securityfocus.com/bid/36507Exploit

Quick Facts

CVE IDCVE-2009-3522
CVSS Score7.2 / 10
SeverityHIGH
WeaknessCWE-119
CISA KEVNo
ExploitPOC
Affected1 vendor(s)
PublishedOct 1, 2009

Related CVEs (CWE-119)

CVE-2009-4181
10.0
CVE-2009-4176
10.0
CVE-2009-4240
10.0
CVE-2009-4177
10.0
CVE-2009-3848
10.0
CVE-2009-0898
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2009-3522 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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