Vulnerabilities > CVE-2009-0349 - Buffer Errors vulnerability in Ftpshell Server 4.3
Attack vector
NETWORK Attack complexity
MEDIUM Privileges required
NONE Confidentiality impact
COMPLETE Integrity impact
COMPLETE Availability impact
COMPLETE Summary
Stack-based buffer overflow in FTPShell Server 4.3 allows user-assisted remote attackers to cause a denial of service (persistent daemon crash) and possibly execute arbitrary code via a long string in a licensing key (aka .key) file.
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 | FTPShell Server 4.3 (licence key) Remote Buffer Overflow PoC. CVE-2009-0349. Dos exploit for windows platform |
| file | exploits/windows/dos/7852.pl |
| id | EDB-ID:7852 |
| last seen | 2016-02-01 |
| modified | 2009-01-22 |
| platform | windows |
| port | |
| published | 2009-01-22 |
| reporter | LiquidWorm |
| source | https://www.exploit-db.com/download/7852/ |
| title | FTPShell Server 4.3 licence key Remote Buffer Overflow PoC |
| type | dos |
Seebug
| bulletinFamily | exploit |
| description | BUGTRAQ ID: 33403 CVE(CAN) ID: CVE-2009-0349 FTPShell Server是一款安全可靠的FTP客户端工具。 FTPShell Server在处理畸形的证书密钥（.key）文件时存在栈溢出漏洞。如果用户受骗导入了大于8000字节的证书的话，就可能触发这个溢出，导致拒绝服务或执行任意代码。 Codeorigin FTPShell Server 4.3 厂商补丁： Codeorigin ---------- 目前厂商还没有提供补丁或者升级程序，我们建议使用此软件的用户随时关注厂商的主页以获取最新版本： <a href=http://www.ftpshell.com/index.htm target=_blank rel=external nofollow>http://www.ftpshell.com/index.htm</a> |
| id | SSV:4751 |
| last seen | 2017-11-19 |
| modified | 2009-02-13 |
| published | 2009-02-13 |
| reporter | Root |
| source | https://www.seebug.org/vuldb/ssvid-4751 |
| title | FTPShell Server证书密钥文件处理栈溢出漏洞 |