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CVE-2007-4321

UnknownEPSS 5.75%

Last modified

CVE-2007-4321 is a vulnerability of currently unknown severity. fail2ban 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.. EPSS estimates a 5.75% chance of exploitation in the next 30 days.

Description

fail2ban 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.

Metrics

EPSS Probability
5.75%

92.1th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

VendorProductVersions
Fail2banFail2ban0.8

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2007-4321?
fail2ban 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.
How severe is CVE-2007-4321?
Severity scoring for CVE-2007-4321 is pending analysis. The EPSS model estimates a 5.75% probability of exploitation in the next 30 days.
How do I fix CVE-2007-4321?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2007-4321?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST