The FWDRV driver in Kerio Personal Firewall 4.2 and Server Firewall 1.1.1 allows local users to cause a denial of service (crash) by setting the PAGE_NOACCESS or PAGE_GUARD protection on the Page Environment Block (PEB), which triggers an exception, aka the "PEB lockout vulnerability."
Conclusion & alert: CVE-2005-3286 is rated Low Risk (17.1/100): CVSS Low severity, with low exploitation likelihood (EPSS 0.10%). Mandatory action: Low composite risk—no urgent action required; patch on your normal maintenance cycle and revisit priority if CVSS or EPSS increases.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2025-03-17 | 0.04% | 0.10% | +0.05% |
| 2 | 2023-03-07 | 1.10% | 0.04% | -1.06% |
| 3 | 2022-02-04 | — | 1.10% | — |
Full EPSS history (3 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 2.1 | 2.0 | LOW |
|
3.9 | 2.9 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| kerio | personal_firewall | 4.2 | cpe:2.3:a:kerio:personal_firewall:4.2:*:*:*:*:*:*:* |
| kerio | serverfirewall | 1.1.1 | cpe:2.3:a:kerio:serverfirewall:1.1.1:*:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| http://lists.grok.org.uk/pipermail/full-disclosure/2005-October/037958.html | Vendor Advisory |
| http://pb.specialised.info/all/adv/kerio-fwdrv-dos-adv.txt | Vendor Advisory |
| http://seclists.org/bugtraq/2005/Oct/166 | |
| http://secunia.com/advisories/17155 | Patch Vendor Advisory |
| http://securityreason.com/securityalert/78 | |
| http://www.kerio.com/security_advisory.html | Patch Vendor Advisory |
| http://www.osvdb.org/19961 | |
| http://www.securityfocus.com/bid/15094 |