Is CVE-2009-0362 in the CISA KEV catalog?

No. CVE-2009-0362 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2009-0362?

CVE-2009-0362 has a CVSS v2 base score of 4.0 (MEDIUM).

What is the EPSS score for CVE-2009-0362?

CVE-2009-0362 has an EPSS score of 1.30% (67th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2009-0362?

Upgrade fail2ban on debian 11 to 0.8.3-2sid1 or later.

CVE & CISA-KEV Catalog

CVE-2009-0362

MEDIUM

4.0

CVSS v2

NVD

Description

filter.d/wuftpd.conf in Fail2ban 0.8.3 uses an incorrect regular expression that allows remote attackers to cause a denial of service (forced authentication failures) via a crafted reverse-resolved DNS name (rhost) entry that contains a substring that is interpreted as an IP address, a different vulnerability than CVE-2007-4321.

CWE-287Improper Authentication

How to fix

Remediation Available

fail2banDebian

Fixed in:0.8.3-2sid1CVE-2009-0362

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

1.30%probability of exploitation in 30 days

67thpercentile

Moderate risk: more likely to be exploited than 67% of all known CVEs.

References

Exploit1

bugs.debian.org

Vendor Advisory1

secunia.com

Other references1

securityfocus.com

Related Vulnerabilities

Other CWE-287 (Improper Authentication) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-35082	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2023-35078	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2017-7921	Critical	9.8	100%	KEV	-
CVE-2024-7593	Critical	9.8	100%	KEV	-
CVE-2023-46805	High	8.2	100%	KEV + Ransom	-
CVE-2022-40684	Critical	9.8	100%	KEV + Ransom	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-23.