How severe is CVE-2007-4322?

CVE-2007-4322 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2007-4322 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-4322?

CVE-2007-4322 affects Ac Zoom Blockhosts. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2007-4322?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2007-4322 published?

CVE-2007-4322 was published on 2007-08-14 and last updated on 2026-06-16.

CVE-2007-4322

CVE-2007-4322 is a medium-severity vulnerability in Ac Zoom Blockhosts with a CVSS 2.0 base score of 6.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Ac Zoom Blockhosts
Published: 2007-08-14
Last modified: 2026-06-16

Description

BlockHosts before 2.0.4 does not properly parse (1) sshd and (2) vsftpd log files, which allows remote attackers to add arbitrary deny entries to the /etc/hosts.allow file and cause a denial of service by adding arbitrary IP addresses to a daemon log file, as demonstrated by connecting through ssh with a client protocol version identification containing an IP address string, or connecting through ftp with a username containing an IP address string, different vectors than CVE-2007-2765.

Frequently asked questions

What is CVE-2007-4322?: BlockHosts before 2.0.4 does not properly parse (1) sshd and (2) vsftpd log files, which allows remote attackers to add arbitrary deny entries to the /etc/hosts.allow file and cause a denial of service by adding arbitrary IP addresses to a daemon log file, as demonstrated by connecting through ssh with a client protocol version identification containing an IP address string, or connecting through ftp with a username containing an IP address string, different vectors than CVE-2007-2765.
How severe is CVE-2007-4322?: CVE-2007-4322 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2007-4322 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-4322?: CVE-2007-4322 affects Ac Zoom Blockhosts. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2007-4322?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2007-4322 published?: CVE-2007-4322 was published on 2007-08-14 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:ac_zoom:blockhosts:2.0.4:*:*:*:*:*:*:*

More vulnerabilities in Ac Zoom Blockhosts

CVE-2007-2765 — Medium (CVSS 6.8): blockhosts.py in BlockHosts before 2.0.3 does not properly parse daemon log files, which allows remote attackers to add…

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