THREATPORT/VULNERABILITY/CVE-2006-6171
HIGH SEVERITY

CVE-2006-6171

Proftpd vulnerability

CVSS
7.5
EPSS
9.6%
EPSS pct
95th
Exploited
No known
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
Affected vendor
Proftpd Project
Affected product
Proftpd
CVSS vector
AV:N/AC:L/Au:N/C:P/I:P/A:P
Published
2006-11-30

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no authentication. Successful exploitation leads to partial impact to confidentiality, partial impact to integrity, partial impact to availability.

Its EPSS score of 9.6% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 95% of all scored CVEs.

Check your external exposure to CVE-2006-6171

  • Confirm whether Proftpd Project Proftpd is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2006-6171.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2006-6171

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2006-6171 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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