CVE-2006-6171
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
Key facts
- CVSS score
- 7.5 (v2.0)
- Severity
- HIGH
- CVSS vector
AV:N/AC:L/Au:N/C:P/I:P/A:P- EPSS score
- 10.2% (96th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2006-6154)
- Published
- November 30, 2006
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2006-6154 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- proftpd project / proftpd
References
- http://proftp.cvs.sourceforge.net/proftp/proftpd/src/main.c?r1=1.292&r2=1.293&sortby=date(Vendor Advisory)
- http://secunia.com/advisories/23174
- http://secunia.com/advisories/23179
- http://secunia.com/advisories/23184
- http://secunia.com/advisories/23207
- http://secunia.com/advisories/23329
- http://slackware.com/security/viewer.php?l=slackware-security&y=2006&m=slackware-security.502491
- http://www.debian.org/security/2006/dsa-1218
- http://www.debian.org/security/2006/dsa-1222
- http://www.gentoo.org/security/en/glsa/glsa-200611-26.xml
- http://www.mandriva.com/security/advisories?name=MDKSA-2006:217-1
- http://www.openpkg.com/security/advisories/OpenPKG-SA-2006.035.html
- http://www.trustix.org/errata/2006/0070
- https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=214820(Vendor Advisory)
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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