CVE-2011-5166
Multiple stack-based buffer overflows in KnFTP 1.0.0 allow remote attackers to execute arbitrary code via a long string to the (1) USER,…
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
Multiple stack-based buffer overflows in KnFTP 1.0.0 allow remote attackers to execute arbitrary code via a long string to the (1) USER, (2) PASS, (3) REIN, (4) QUIT, (5) PORT, (6) PASV, (7) TYPE, (8) STRU, (9) MODE, (10) RETR, (11) STOR, (12) APPE, (13) ALLO, (14) REST, (15) RNFR, (16) RNTO, (17) ABOR, (18) DELE, (19) CWD, (20) LIST, (21) NLST, (22) SITE, (23) STST, (24) HELP, (25) NOOP, (26) MKD, (27) RMD, (28) PWD, (29) CDUP, (30) STOU, (31) SNMT, (32) SYST, and (33) XPWD commands.
Public exploit
4 references of the record are tagged as an exploit or proof of concept: anyone can try it against an unpatched system.
- 17856 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
- 18089 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
- 17819 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
- 17870 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
Timeline
ID reserved
By mitre
Published
- 12 years later
· 12 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)
- 6.5% · top 6.2% of all CVEs (8 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Weakness
Affected products
n/a
- affected n/a
References (8)
- 45907 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 17856 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
- 20110902 KnFTPd v1.0.0 Multiple Command Remote Buffer Overflow (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 18089 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
- knftpd-multiple-commands-bo(69557) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- 75147 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
- 17819 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
- 17870 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_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)
- 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-2011-5166)Record last updated .