CVE-2009-4593

CVE-2009-4593 is a medium-severity vulnerability in Jesse Smith Bftpd with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

The bftpdutmp_log function in bftpdutmp.c in Bftpd before 2.4 does not place a '\0' character at the end of the string value of the ut.bu_host structure member, which might allow remote attackers to cause a denial of service (daemon crash) via unspecified vectors. NOTE: some of these details are obtained from third party information.

Frequently asked questions

What is CVE-2009-4593?
The bftpdutmp_log function in bftpdutmp.c in Bftpd before 2.4 does not place a '\0' character at the end of the string value of the ut.bu_host structure member, which might allow remote attackers to cause a denial of service (daemon crash) via unspecified vectors. NOTE: some of these details are obtained from third party information.
How severe is CVE-2009-4593?
CVE-2009-4593 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2009-4593 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-4593?
CVE-2009-4593 primarily affects Jesse Smith Bftpd. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-4593?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-4593 published?
CVE-2009-4593 was published on 2010-01-07 and last updated on 2026-06-16.

References

Affected products (12)