$ cve CVE-2011-5166 JSON

CVE-2011-5166 EXPLOIT

7.5

HIGH · CVSS 2.0 · EPSS 6.5% (pctl 94)

Patch early

A public exploit exists.

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.

Scoring

CVSS	7.5 (HIGH, v2.0)
Vector	AV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS	6.48% — more likely to be exploited than 94% of all CVEs
Weakness	CWE-119
On CISA KEV	no
Public exploit	yes
Published	2012-09-15
Last modified	2026-06-16

Affected (1)

Vendor	Product
elif keir	knftp

Public exploits

Source	Title	Date
exploit-db	KnFTP 1.0 - Remote Buffer Overflow (DEP Bypass) (Metasploit)	2011-11-07
exploit-db	KnFTP 1.0.0 Server - 'USER' Remote Buffer Overflow	2011-09-19
exploit-db	KnFTP 1.0.0 Server - Multiple Buffer Overflows (PoC) (SEH)	2011-09-18
exploit-db	KnFTP Server - Remote Buffer Overflow	2011-09-12

References

→ the Explorer · watch your stack · NVD