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Fencer Vulns
high 7.5

CVE-2006-6171 in the critical feed json

ProFTPD 1.3.0a and earlier does not properly set the buffer size limit when CommandBufferSize is specified in the configuration file, which…

published 2006-11-30 19 y ago modified 2026-06-16 4 mo ago also EUVD-2006-6154

cvss
7.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
10.2%
EPSS 10.2% chance of exploitation in 30 days, percentile 95%
public exploits
0
none known

Summary

ProFTPD 1.3.0a and earlier does not properly set the buffer size limit when CommandBufferSize is specified in the configuration file, which leads to an off-by-two buffer underflow. NOTE: in November 2006, the role of CommandBufferSize was originally associated with CVE-2006-5815, but this was an error stemming from a vague initial disclosure. NOTE: ProFTPD developers dispute this issue, saying that the relevant memory location is overwritten by assignment before further use within the affected function, so this is not a vulnerability

Patch / fix

  • proftpd-dfsg Debian 14, Debian 13, Debian 12 1.3.0-13

debian advisories DEBIAN-CVE-2006-6171

Exploit prediction

10.25% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.