CVE-2007-4321

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Summary

CVECVE-2007-4321
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2007-08-14 00:17:00 UTC
Updated2026-04-23 00:35:47 UTC
Descriptionfail2ban 0.8 and earlier does not properly parse sshd log files, which allows remote attackers to add arbitrary hosts to the /etc/hosts.deny file and cause a denial of service by adding arbitrary IP addresses to the sshd log file, as demonstrated by logging in via ssh with a client protocol version identification containing an IP address string, a different vector than CVE-2006-6302.

Risk And Classification

Primary CVSS: v2.0 6.8 from [email protected]

AV:N/AC:M/Au:N/C:P/I:P/A:P

Problem Types: NVD-CWE-Other | n/a

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial

AV:N/AC:M/Au:N/C:P/I:P/A:P

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Fail2ban Fail2ban 0.8 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
Fail2ban: Denial of Service — Gentoo Linux Documentation af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org
osvdb.org/42484 af854a3a-2127-422b-91ae-364da2661108 osvdb.org
Debian -- Security Information -- DSA-1456-1 fail2ban af854a3a-2127-422b-91ae-364da2661108 www.debian.org
Gentoo Bug 181214 - net-analyzer/fail2ban < 0.8.0-r1 Log injection (CVE-2007-4321) af854a3a-2127-422b-91ae-364da2661108 bugs.gentoo.org
Fail2ban Remote Denial of Service Vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
Debian update for fail2ban - Secunia.com af854a3a-2127-422b-91ae-364da2661108 secunia.com
OSSEC HIDS - Open Source Security af854a3a-2127-422b-91ae-364da2661108 www.ossec.net
Fail2ban Denial of Service Vulnerability - Advisories - Secunia af854a3a-2127-422b-91ae-364da2661108 secunia.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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