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Vulnerability record · CVE-2006-6623 · published 18 December 2006

CVE-2006-6623: Avg antivirus plus firewall vulnerability

Avg · Antivirus Plus Firewall

Sygate Personal Firewall 5.6.2808 relies on the Process Environment Block (PEB) to identify a process, which allows local users to bypass the product's controls on a process by spoofing the (1) ImagePathName, (2) CommandLine, and (3) WindowTitle fields in the PEB.

7.2 CVSS 2.0 High EPSS 0.33% · top 76.3%
7.2CVSS 2.0 base score
0.33%EPSS exploitation probability, 30 days
NoNot in CISA KEV
6Affected product versions listed by NVD
8References
16 Jun 2026Last modified by NVD

Description

Sygate Personal Firewall 5.6.2808 relies on the Process Environment Block (PEB) to identify a process, which allows local users to bypass the product's controls on a process by spoofing the (1) ImagePathName, (2) CommandLine, and (3) WindowTitle fields in the PEB.

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

Affected products

6 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.matousec.com/downloads/windows-personal-firewall-analysis/ex-coat.zip
http://www.matousec.com/info/advisories/Bypassing-process-identification-serveral-personal-firewalls-HIPS.php Vendor Advisory
http://www.securityfocus.com/archive/1/454522/100/0/threaded
http://www.securityfocus.com/bid/21615
http://www.matousec.com/downloads/windows-personal-firewall-analysis/ex-coat.zip
http://www.matousec.com/info/advisories/Bypassing-process-identification-serveral-personal-firewalls-HIPS.php Vendor Advisory
http://www.securityfocus.com/archive/1/454522/100/0/threaded
http://www.securityfocus.com/bid/21615

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.2CVE-2008-1736Comodo personal firewall vulnerabilityComodo Firewall Pro before 3.0 does not properly validate certain parameters to hooked System Service Descriptor Table (SSDT) functions, which allows…EPSS 0.37%7.2CVE-2007-2729Comodo firewall pro vulnerabilityComodo Firewall Pro 2.4.18.184 and Comodo Personal Firewall 2.3.6.81, and probably older Comodo Firewall versions, do not properly test for equivalen…EPSS 0.32%7.2CVE-2007-2730Checkpoint zonealarm vulnerabilityCheck Point ZoneAlarm Pro before 6.5.737.000 does not properly test for equivalence of process identifiers for certain Microsoft Windows API function…EPSS 0.32%7.2CVE-2006-6618Avg antivirus plus firewall vulnerabilityAntiHook 3.0.0.23 - Desktop relies on the Process Environment Block (PEB) to identify a process, which allows local users to bypass the product's con…EPSS 0.33%7.2CVE-2006-6619Avg antivirus plus firewall vulnerabilityAVG Anti-Virus plus Firewall 7.5.431 relies on the Process Environment Block (PEB) to identify a process, which allows local users to bypass the prod…EPSS 0.99%7.2CVE-2006-6620Avg antivirus plus firewall vulnerabilityComodo Personal Firewall 2.3.6.81 relies on the Process Environment Block (PEB) to identify a process, which allows local users to bypass the product…EPSS 0.33%7.2CVE-2006-6621Avg antivirus plus firewall vulnerabilityFilseclab Personal Firewall 3.0.0.8686 relies on the Process Environment Block (PEB) to identify a process, which allows local users to bypass the pr…EPSS 0.33%7.2CVE-2006-6622Avg antivirus plus firewall vulnerabilitySoft4Ever Look 'n' Stop (LnS) 2.05p2 before 20061215 relies on the Process Environment Block (PEB) to identify a process, which allows local users to…EPSS 0.33%

Source: NIST National Vulnerability Database (record CVE-2006-6623), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.