ProFTPD 1.3.0a and earlier does not properly set the buffer size limit when…
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Partial · Partial · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
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
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:proftpd_project:proftpd:*:*:*:*:*:*:*:* | up to 1.3.0a | Vulnerable | ProFTPD Project |
- cpe:2.3:a:proftpd_project:proftpd:*:*:*:*:*:*:*:* Versions up to 1.3.0a Vulnerable ·ProFTPD Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2006-6171
- 2026-10-03 Alias added: GHSA-fg3g-4994-3829
References
More ProFTPD Project Proftpd vulnerabilities
- TI-2006-05599 Stack-based buffer overflow in the sreplace function in ProFTPD 1.3.0 and earlier allows… CVSS 2.0HIGH 10.0
- TI-2003-00766 ProFTPD 1.2.7 through 1.2.9rc2 does not properly translate newline characters when… CVSS 2.0HIGH 9.0
- TI-2009-00521 SQL injection vulnerability in ProFTPD Server 1.3.1 through 1.3.2rc2 allows remote… CVSS 2.0HIGH 7.5
- TI-1999-00861 Buffer overflow in ProFTPD, wu-ftpd, and beroftpd allows remote attackers to gain root… CVSS 2.0HIGH 10.0
- TI-1999-00363 Buffer overflows in wuarchive ftpd (wu-ftpd) and ProFTPD lead to remote root access… CVSS 2.0HIGH 10.0
- TI-2003-00471 SQL injection vulnerability in the PostgreSQL authentication module (mod_sql_postgres)… CVSS 2.0HIGH 10.0
Sources
- CVE-2006-6171 · CVE Program
- CVE-2006-6171 · NVD
- FIRST EPSS
- GHSA-fg3g-4994-3829 · GitHub Advisory Database · CC BY 4.0
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