CVE-2006-6171ProFTPD 1.3.0a and earlier does not properly set the buffer size limit when CommandBufferSize is specified in the configuration file,…
- 7.5HighCVSS base score
- 10.2%Exploitation in 30 daysEPSS · top 4.2% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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
Timeline
ID reserved
By mitre
Published
- 18 years later
· 18 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | High7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
- EPSS (exploitation in 30 days)
- 10.2% · top 4.2% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
n/a
- affected n/a
References
References14
- DSA-1222 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- http://proftp.cvs.sourceforge.net/proftp/proftpd/src/main.c?r1=1.292&r2=1.293&sortby=date (opens in a new tab)x_refsource_MISCx_transferred
- DSA-1218 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- 23207 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- SSA:2006-335-02 (opens in a new tab)vendor-advisoryx_refsource_SLACKWAREx_transferred
- 23174 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- MDKSA-2006:217-1 (opens in a new tab)vendor-advisoryx_refsource_MANDRIVAx_transferred
- 2006-0070 (opens in a new tab)vendor-advisoryx_refsource_TRUSTIXx_transferred
- 23329 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=214820 (opens in a new tab)x_refsource_CONFIRMx_transferred
- 23184 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 23179 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- GLSA-200611-26 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- OpenPKG-SA-2006.035 (opens in a new tab)vendor-advisoryx_refsource_OPENPKGx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2006-6154 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2006-6171)Record last updated .