Vulnerabilities > CVE-2011-5166 - Buffer Errors vulnerability in Elif Keir Knftp 1.0.0
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
PARTIAL Integrity impact
PARTIAL Availability impact
PARTIAL Summary
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.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| Application | 1 |
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Buffer Overflow via Environment Variables This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
- Overflow Buffers Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
- Client-side Injection-induced Buffer Overflow This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
- Filter Failure through Buffer Overflow In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
- MIME Conversion An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.
Exploit-Db
description KnFTP 1.0.0 Server Multiple Buffer Overflow Exploit (DoS PoC). CVE-2011-5166. Dos exploit for windows platform file exploits/windows/dos/17856.py id EDB-ID:17856 last seen 2016-02-02 modified 2011-09-18 platform windows port 21 published 2011-09-18 reporter loneferret source https://www.exploit-db.com/download/17856/ title KnFTP 1.0.0 Server Multiple Buffer Overflow Exploit DoS PoC type dos description KnFTP Server Buffer Overflow Exploit. CVE-2011-5166. Remote exploit for windows platform file exploits/windows/remote/17819.py id EDB-ID:17819 last seen 2016-02-02 modified 2011-09-12 platform windows port published 2011-09-12 reporter blake source https://www.exploit-db.com/download/17819/ title KnFTP Server Buffer Overflow Exploit type remote description KnFTP 1.0.0 Server - 'USER' command Remote Buffer Overflow Exploit. CVE-2011-5166. Remote exploit for windows platform file exploits/windows/remote/17870.pl id EDB-ID:17870 last seen 2016-02-02 modified 2011-09-19 platform windows port published 2011-09-19 reporter mr.pr0n source https://www.exploit-db.com/download/17870/ title KnFTP 1.0.0 Server - 'USER' command Remote Buffer Overflow Exploit type remote description KnFTP 1.0 - Buffer Overflow Exploit - DEP Bypass. CVE-2011-5166. Remote exploit for windows platform file exploits/windows/remote/18089.rb id EDB-ID:18089 last seen 2016-02-02 modified 2011-11-07 platform windows port published 2011-11-07 reporter pasta source https://www.exploit-db.com/download/18089/ title KnFTP 1.0 - Buffer Overflow Exploit - DEP Bypass type remote
References
- http://archives.neohapsis.com/archives/bugtraq/2011-09/0015.html
- http://secunia.com/advisories/45907
- http://www.exploit-db.com/exploits/17819
- http://www.exploit-db.com/exploits/17856
- http://www.exploit-db.com/exploits/17870
- http://www.exploit-db.com/exploits/18089
- http://www.osvdb.org/75147
- https://exchange.xforce.ibmcloud.com/vulnerabilities/69557