信安周报-第03周：DB系统表
信安之路
第03周
前言
这周自主研究的任务如下：
任务附录的解释：
- 文件读写在通过数据库注入漏洞获取webshell的时候很有用
- 系统库和表存放了很多关键信息，在利用注入漏洞获取更多信息和权限的过程很有帮助
- eg：库信息、表信息、用户信息、权限信息、安装配置信息
- 用户信息表一般密码都是hash加密过的，可以利用hashcat暴力破解（GPU）
1.文件操作相关
1.1.探索与发现
需要什么权限才可以进行文件读写操作，看个简单测试：
读写前提：
secure_file_priv不为NULL、用户具有File权限（mysql.user中用户的file_priv=Y）
先看权限：
root@localhost账号直接可以读取文件
命令附录：
show variables like 'secure_file_priv';
select user,host,file_priv from mysql.user;
select load_file("etc/passwd");
1.2.参数说明
secure_file_priv的简单说明：
PS：
MariaDB5.x默认为空，
- secure_file_priv=
NULL- 表示不允许文件读写
- secure_file_priv=
/xxx（/则代表任意目录读写）- 表示只能在指定目录
/xxx中文件读写，其他目录不行
- 表示只能在指定目录
- secure_file_priv为空时
- 表示可在任意目录文件读写
PS：目标文件大小必须小于select @@max_allowed_packet;的值
# MariaDB默认值
MariaDB [(none)]> select @@max_allowed_packet;
+----------------------+
| @@max_allowed_packet |
+----------------------+
| 1048576 |
+----------------------+
1 row in set (0.00 sec)
1.3.用户授权
bryan账号本来是没file权限的（file_priv=N）
我们授权一下：grant file on *.* to bryan@'%';
PS：查看数据库支持哪些权限：
show privileges;、刷新权限：flush privileges;
这时候用root权限查看下bryan的file_priv就会发现有权限了
PS：回收权限：
revoke file from *.* from bryan@'%'
1.4.load_file测试
本地测试：bryan@localhost
远程测试：bryan@'%'（重开一个查询窗口/会话）
1.5.load data infile测试
load data infile的主要作用就是从一个文本文件中读取行，并写入一个表中
语法：
load data infile '文件路径' into table 表名;
1.6.select into outfile测试
select into outfile主要作用就是：把查询写入文件中
语法：
select * from 表名 into outfile '权限范围内文件路径';
PS：如果文件已经存在则写入失败
删除了临时文件夹创建也会失败，必须重启数据库，或者创建文件夹后改成mysql所有
系统中真正路径：
扩展：system命令
mysql命令行下的system摸索过程：
PS：任意读 + 权限范围内写（
本地执行orSSH连接Linux进入MySQL命令行执行）
渗透思路：
- 读取某些敏感的配置文件（eg：数据库连接的配置文件）
- 当有目录越权访问漏洞的时候可以越权执行脚本（权限范围内的目录中写入脚本）
PS C:\Users\Mao> ssh -l bryan 192.168.0.9
bryan@192.168.0.9 password:
Welcome to Ubuntu 18.04.2 LTS (GNU/Linux 5.0.0-23-generic x86_64)
bryan@bryan-pc:~$ mysql -ubryan -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 10
Server version: 5.7.27-0ubuntu0.18.04.1-log (Ubuntu)
Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
# mysql> select user();
+-----------------+
| user() |
+-----------------+
| bryan@localhost |
+-----------------+
1 row in set (0.06 sec)
# mysql> system ls /home
dnt
# mysql> system ls /var/www/html
index.nginx-debian.html index.php
# mysql> system cat /var/www/html/index.php
<?php
phpinfo();
?>
# mysql> system vi /home/bryan/test.py
# mysql> system cat /home/bryan/test.py
print("test")
# mysql> system cat /etc/passwd
root:x:0:0:root:/root:/bin/bash
bin:x:1:1:bin:/bin:/sbin/nologin
daemon:x:2:2:daemon:/sbin:/sbin/nologin
adm:x:3:4:adm:/var/adm:/sbin/nologin
lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin
sync:x:5:0:sync:/sbin:/bin/sync
shutdown:x:6:0:shutdown:/sbin:/sbin/shutdown
halt:x:7:0:halt:/sbin:/sbin/halt
mail:x:8:12:mail:/var/spool/mail:/sbin/nologin
operator:x:11:0:operator:/root:/sbin/nologin
games:x:12:100:games:/usr/games:/sbin/nologin
ftp:x:14:50:FTP User:/var/ftp:/sbin/nologin
nobody:x:99:99:Nobody:/:/sbin/nologin
avahi-autoipd:x:170:170:Avahi IPv4LL Stack:/var/lib/avahi-autoipd:/sbin/nologin
systemd-bus-proxy:x:999:997:systemd Bus Proxy:/:/sbin/nologin
systemd-network:x:998:996:systemd Network Management:/:/sbin/nologin
dbus:x:81:81:System message bus:/:/sbin/nologin
polkitd:x:997:995:User for polkitd:/:/sbin/nologin
tss:x:59:59:Account used by the trousers package to sandbox the tcsd daemon:/dev/null:/sbin/nologin
postfix:x:89:89::/var/spool/postfix:/sbin/nologin
sshd:x:74:74:Privilege-separated SSH:/var/empty/sshd:/sbin/nologin
bryan:x:1000:1000:xxx:/home/bryan:/bin/bash
mysql:x:27:27:MariaDB Server:/var/lib/mysql:/sbin/nologin
nginx:x:1001:1001::/home/nginx:/sbin/nologin
扩展命令：pager
重定向查询结果：pager cat >> /home/dnt/test.log
把查询的结果，全部追加写入到指定文件中（只针对当前会话）
2.获取系统信息
2.1.获取数据库版本
select version(); or select @@version;
2.2.获取操作系统类型
select @@version_compile_os;
2.3.获取服务器主机名
select @@hostname;
3.获取DB信息
3.1.获取数据库列表
select schema_name from information_schema.schemata;
PS：MySQL5.x可以通过schemata表来查询
权限范围内的数据库
root权限下获取所有DB列表
PS：root权限可以使用 select schema_name from information_schema.schemata; or select distinct(db) from mysql.db; 来显示所有数据库
3.2.获取当前数据库
获取正在use的数据库：select database();
3.3.获取指定DB有哪些表
select table_schema,table_name,table_type,engine from information_schema.tables where table_schema = '数据库名';
3.4.查询指定表含哪些列
select table_schema,table_name,column_name from information_schema.columns where table_schema= '数据库名' and table_name = '表名';
PS：查询除内置数据库外其他数据库和表：select table_schema,table_name,column_name from information_schema.columns where table_schema != 'mysql' and table_schema != 'information_schema' order by table_schema,table_name;
寻找自己感兴趣的列
根据特定关键词就可以省去暴力解猜：select table_schema,table_name,column_name from information_schema.columns where column_name like 'pass%' or column_name like 'user%';
3.5.获取目录信息
- 获取数据库安装目录：
select @@basedir; - 获取数据目录：
select @@datadir;
目录验证：
mysql> show variables like '%basedir%';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| basedir | /usr/ |
+---------------+-------+
1 row in set (0.00 sec)
mysql> show variables like '%datadir%';
+---------------+-----------------+
| Variable_name | Value |
+---------------+-----------------+
| datadir | /var/lib/mysql/ |
+---------------+-----------------+
1 row in set (0.00 sec)
4.获取用户信息
4.1.获取当前用户名
select user(); or select system_user(); or select current_user;
获取用户信息（含密码）
【root权限】显示所有用户（含密码）
MariaDB5.x：select user,host,password from mysql.user;
MySQL5.x：select user,host,authentication_string from mysql.user;
PS：系统生成的加密sha字符串是41位（*1位+sha40位）
sha1是40位，但mysql的加密是变种sha1
4.2.查看指定DB的用户权限
select grantee, table_schema, privilege_type from information_schema.schema_privileges where table_schema = 'safe_db';
4.3.查询用户权限列表
select grantee, privilege_type, is_grantable from information_schema.user_privileges;
PS：也可使用
show grants for bryan;
PS：root权限查询的更全面
root权限通过mysql.user查询更详细权限信息
【root权限】通过mysql.user查询更详细权限信息：select host, user, Select_priv, Insert_priv, Update_priv, Delete_priv, Create_priv, Drop_priv, Reload_priv, Shutdown_priv, Process_priv, File_priv, Grant_priv, References_priv, Index_priv, Alter_priv, Show_db_priv, Super_priv, Create_tmp_table_priv, Lock_tables_priv, Execute_priv, Repl_slave_priv, Repl_client_priv,Create_view_priv,Show_view_priv,Create_routine_priv,Alter_routine_priv,Create_user_priv,Event_priv,Trigger_priv,Create_tablespace_priv from mysql.user;
- Select_priv：用户是否可以通过SELECT命令选择数据
- Insert_priv：用户是否可以通过INSERT命令插入数据
- Update_priv：用户是否可以通过UPDATE命令修改现有数据
- Delete_priv：用户是否可以通过DELETE命令删除现有数据
- Create_priv：用户是否可以创建新的数据库和表
- Drop_priv：用户是否可以删除现有数据库和表
- Reload_priv：用户是否可以执行刷新和重新加载MySQL所用各种内部缓存的特定命令（包括日志、权限、主机、查询和表重新加载权限表）
- Shutdown_priv：用户是否可以关闭MySQL服务器（不推荐付给root外用户）
- Process_priv：用户是否可以通过
show processlist;命令查看其他用户的进程服务器管理 - File_priv：用户是否可以执行
select into outfile和load data infile命令加载服务器上的文件 - Grant_priv：用户是否可以将已经授予给该用户自己的权限再授予其他用户(可赋予全部已有权限)
- References_priv：目前只是某些未来功能的占位符；现在没有作用
- Index_priv：用户是否可以创建和删除表索引用索引查询表
- Alter_priv：用户是否可以重命名和修改表结构
- Show_db_priv：用户是否可以查看服务器上所有数据库的名字（不推荐开启）
- Super_priv：用户是否可以执行某些强大的管理功能
- 例如通过
kill命令删除用户进程 - 使用
set global修改全局MySQL变量 - 执行关于复制和日志的各种命令超级权限
- 例如通过
- Create_tmp_table_priv：用户是否可以创建临时表
- Lock_tables_priv：用户是否可以使用
lock tables命令阻止对表的访问/修改 - Execute_priv：用户是否可以执行存储过程此（MySQL 5新增）
- Repl_slave_priv：用户是否可以读取用于维护复制数据库环境的二进制日志文件
- Repl_client_priv：用户是否可以确定复制从服务器和主服务器的位置从服务器管理
- Create_view_priv：用户是否可以创建视图（MySQL 5新增）
- Show_view_priv：用户是否可以查看视图或了解视图如何执行（MySQL 5新增）
- Create_routine_priv：用户是否可以更改或放弃存储过程和函数（MySQL 5新增）
- Alter_routine_priv：用户是否可以修改或删除存储函数及函数（MySQL 5新增）
- Create_user_priv：用户是否可以执行
CREATE USER用于创建新的MySQL账户 - Event_priv：用户是否创建、修改和删除事件（MySQL 5.1.6新增）
- Trigger_priv：用户是否创建和删除触发器（MySQL 5.1.6新增）
- Create_tablespace_priv：用户是否可以创建表空间
MariaDB [safe_db]> select host, user, Select_priv, Insert_priv, Update_priv, Delete_priv, Create_priv, Drop_priv, Reload_priv, Shutdown_priv, Process_priv, File_priv, Grant_priv, References_priv, Index_priv, Alter_priv, Show_db_priv, Super_priv, Create_tmp_table_priv, Lock_tables_priv, Execute_priv, Repl_slave_priv, Repl_client_priv,Create_view_priv,Show_view_priv,Create_routine_priv,Alter_routine_priv,Create_user_priv,Event_priv,Trigger_priv,Create_tablespace_priv from mysql.user\G;
*************************** 1. row ***************************
host: localhost
user: root
Select_priv: Y
Insert_priv: Y
Update_priv: Y
Delete_priv: Y
Create_priv: Y
Drop_priv: Y
Reload_priv: Y
Shutdown_priv: Y
Process_priv: Y
File_priv: Y
Grant_priv: Y
References_priv: Y
Index_priv: Y
Alter_priv: Y
Show_db_priv: Y
Super_priv: Y
Create_tmp_table_priv: Y
Lock_tables_priv: Y
Execute_priv: Y
Repl_slave_priv: Y
Repl_client_priv: Y
Create_view_priv: Y
Show_view_priv: Y
Create_routine_priv: Y
Alter_routine_priv: Y
Create_user_priv: Y
Event_priv: Y
Trigger_priv: Y
Create_tablespace_priv: Y
*************************** 2. row ***************************
host: %
user: root
Select_priv: N
Insert_priv: N
Update_priv: N
Delete_priv: N
Create_priv: N
Drop_priv: N
Reload_priv: N
Shutdown_priv: N
Process_priv: N
File_priv: N
Grant_priv: N
References_priv: N
Index_priv: N
Alter_priv: N
Show_db_priv: N
Super_priv: N
Create_tmp_table_priv: N
Lock_tables_priv: N
Execute_priv: N
Repl_slave_priv: N
Repl_client_priv: N
Create_view_priv: N
Show_view_priv: N
Create_routine_priv: N
Alter_routine_priv: N
Create_user_priv: N
Event_priv: N
Trigger_priv: N
Create_tablespace_priv: N
。。。。。。
*************************** 5. row ***************************
host: %
user: bryan
Select_priv: N
Insert_priv: N
Update_priv: N
Delete_priv: N
Create_priv: N
Drop_priv: N
Reload_priv: N
Shutdown_priv: N
Process_priv: N
File_priv: N
Grant_priv: N
References_priv: N
Index_priv: N
Alter_priv: N
Show_db_priv: N
Super_priv: N
Create_tmp_table_priv: N
Lock_tables_priv: N
Execute_priv: N
Repl_slave_priv: N
Repl_client_priv: N
Create_view_priv: N
Show_view_priv: N
Create_routine_priv: N
Alter_routine_priv: N
Create_user_priv: N
Event_priv: N
Trigger_priv: N
Create_tablespace_priv: N
6 rows in set (0.00 sec)
扩展
查看当前数据库支持哪些权限：show privileges;
获取列的权限列表（用的不多）
select table_schema, table_name, column_name, privilege_type from information_schema.column_privileges;
5.hashcat初探
官方下载地址：https://hashcat.net/hashcat/
PS：GitHub：https://github.com/hashcat/hashcat
简单使用：hashcat64 --force -a 破解模式编号 -m hash类型 需要破解的hash文件路径 字典路径
Linux：./hashcat64 -a 0 -m 300 ./test.hash ./test.dict --show
PS：如果出问题把
--show去除即可
PS：Win下：hashcat64.exe -a 0 -m 300 test.hash test.dict --show
5.1.参数说明
-a 指定要使用的破解模式，其值参考后面对参数。“-a 0”字典攻击，“-a 1” 组合攻击；“-a 3”掩码攻
击。
-m 指定要破解的hash类型，如果不指定类型，则默认是MD5
-o 指定破解成功后的hash及所对应的明文密码的存放位置,可以用它把破解成功的hash写到指定的文件中
--force 忽略破解过程中的警告信息,跑单条hash可能需要加上此选项
--show 显示已经破解的hash及该hash所对应的明文
--increment 启用增量破解模式,你可以利用此模式让hashcat在指定的密码长度范围内执行破解过程
--increment-min 密码最小长度,后面直接等于一个整数即可,配置increment模式一起使用
--increment-max 密码最大长度,同上
--outfile-format 指定破解结果的输出格式id,默认是3
--username 忽略hash文件中的指定的用户名,在破解linux系统用户密码hash可能会用到
--remove 删除已被破解成功的hash
-r 使用自定义破解规则
5.2.攻击模式
0 = Straight （字典破解）
1 = Combination （组合破解）
2 = Toggle-Case （大小写转换）
3 = Brute-force（掩码暴力破解）
4 = Permutation（序列破解）
5 = Table-Lookup（查表破解）
6 = Hybrid dict + mask 字典加掩码破解
7 = Hybrid mask + dict 掩码+字典破解
8 = Prince（王子破解）
5.3.Hash类型
0 = MD5
10 = md5($pass.$salt)
20 = md5($salt.$pass)
30 = md5(unicode($pass).$salt)
40 = md5($salt.unicode($pass))
50 = HMAC-MD5 (key = $pass)
60 = HMAC-MD5 (key = $salt)
100 = SHA1
110 = sha1($pass.$salt)
120 = sha1($salt.$pass)
130 = sha1(unicode($pass).$salt)
140 = sha1($salt.unicode($pass))
150 = HMAC-SHA1 (key = $pass)
160 = HMAC-SHA1 (key = $salt)
200 = MySQL323
300 = MySQL4.1/MySQL5
400 = phpass, MD5(WordPress), MD5(phpBB3),MD5(Joomla)
500 = md5crypt, MD5(Unix), FreeBSD MD5,Cisco-IOS MD5
900 = MD4
1000 = NTLM
1100 = Domain Cached Credentials (DCC), MSCache
1400 = SHA256
1410 = sha256($pass.$salt)
1420 = sha256($salt.$pass)
1430 = sha256(unicode($pass).$salt)
1431 = base64(sha256(unicode($pass)))
1440 = sha256($salt.unicode($pass))
1450 = HMAC-SHA256 (key = $pass)
1460 = HMAC-SHA256 (key = $salt)
1600 = md5apr1, MD5(APR), Apache MD5
1700 = SHA512
1710 = sha512($pass.$salt)
1720 = sha512($salt.$pass)
1730 = sha512(unicode($pass).$salt)
1740 = sha512($salt.unicode($pass))
1750 = HMAC-SHA512 (key = $pass)
1760 = HMAC-SHA512 (key = $salt)
1800 = SHA-512(Unix)
2400 = Cisco-PIX MD5
2410 = Cisco-ASA MD5
2500 = WPA/WPA2
2600 = Double MD5
3200 = bcrypt, Blowfish(OpenBSD)
3300 = MD5(Sun)
3500 = md5(md5(md5($pass)))
3610 = md5(md5($salt).$pass)
3710 = md5($salt.md5($pass))
3720 = md5($pass.md5($salt))
3800 = md5($salt.$pass.$salt)
3910 = md5(md5($pass).md5($salt))
4010 = md5($salt.md5($salt.$pass))
4110 = md5($salt.md5($pass.$salt))
4210 = md5($username.0.$pass)
4300 = md5(strtoupper(md5($pass)))
4400 = md5(sha1($pass))
4500 = Double SHA1
4600 = sha1(sha1(sha1($pass)))
4700 = sha1(md5($pass))
4800 = MD5(Chap), iSCSI CHAP authentication
4900 = sha1($salt.$pass.$salt)
5000 = SHA-3(Keccak)
5100 = Half MD5
5200 = Password Safe SHA-256
5300 = IKE-PSK MD5
5400 = IKE-PSK SHA1
5500 = NetNTLMv1-VANILLA / NetNTLMv1-ESS
5600 = NetNTLMv2
5700 = Cisco-IOS SHA256
5800 = Android PIN
6300 = AIX {smd5}
6400 = AIX {ssha256}
6500 = AIX {ssha512}
6700 = AIX {ssha1}
6900 = GOST, GOST R 34.11-94
7000 = Fortigate (FortiOS)
7100 = OS X v10.8+
7200 = GRUB 2
7300 = IPMI2 RAKP HMAC-SHA1
7400 = sha256crypt, SHA256(Unix)
7900 = Drupal7
8400 = WBB3, Woltlab Burning Board 3
8900 = scrypt
9200 = Cisco $8$
9300 = Cisco $9$
9800 = Radmin2
10000 = Django (PBKDF2-SHA256)
10200 = Cram MD5
10300 = SAP CODVN H (PWDSALTEDHASH) iSSHA-1
11000 = PrestaShop
11100 = PostgreSQL Challenge-ResponseAuthentication (MD5)
11200 = MySQL Challenge-Response Authentication(SHA1)
11400 = SIP digest authentication (MD5)
99999 = Plaintext
特殊哈希类型
11 = Joomla < 2.5.18
12 = PostgreSQL
21 = osCommerce, xt:Commerce
23 = Skype
101 = nsldap, SHA-1(Base64), Netscape LDAPSHA
111 = nsldaps, SSHA-1(Base64), Netscape LDAPSSHA
112 = Oracle S: Type (Oracle 11+)
121 = SMF > v1.1
122 = OS X v10.4, v10.5, v10.6
123 = EPi
124 = Django (SHA-1)
131 = MSSQL(2000)
132 = MSSQL(2005)
133 = PeopleSoft
141 = EPiServer 6.x < v4
1421 = hMailServer
1441 = EPiServer 6.x > v4
1711 = SSHA-512(Base64), LDAP {SSHA512}
1722 = OS X v10.7
1731 = MSSQL(2012 & 2014)
2611 = vBulletin < v3.8.5
2612 = PHPS
2711 = vBulletin > v3.8.5
2811 = IPB2+, MyBB1.2+
3711 = Mediawiki B type
3721 = WebEdition CMS
7600 = Redmine Project Management Web App
附录
1.获取系统信息
# 获取数据库版本
MariaDB [(none)]> select version();
+----------------+
| version() |
+----------------+
| 5.5.60-MariaDB |
+----------------+
1 row in set (0.00 sec)
MariaDB [(none)]> select @@version;
+----------------+
| @@version |
+----------------+
| 5.5.60-MariaDB |
+----------------+
1 row in set (0.00 sec)
# 获取操作系统
MariaDB [(none)]> select @@version_compile_os;
+----------------------+
| @@version_compile_os |
+----------------------+
| Linux |
+----------------------+
1 row in set (0.00 sec)
# 获取主机名
MariaDB [(none)]> select @@hostname;
+-----------------------+
| @@hostname |
+-----------------------+
| localhost.localdomain |
+-----------------------+
1 row in set (0.00 sec)
mysql> select @@hostname;
+------------+
| @@hostname |
+------------+
| bryan-pc |
+------------+
1 row in set (0.00 sec)
2.获取DB信息
# 1.MySQL5.x可以通过schemata表来查询`权限范围内`的数据库
MariaDB [safe_db]> select schema_name from information_schema.schemata;
+--------------------+
| schema_name |
+--------------------+
| information_schema |
| safe_db |
| work_db |
+--------------------+
3 rows in set (0.00 sec)
# 验证如下：show databases;
MariaDB [safe_db]> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| safe_db |
| work_db |
+--------------------+
3 rows in set (0.00 sec)
# 【root】显示所有数据库
MariaDB [(none)]> select schema_name from information_schema.schemata;
+--------------------+
| schema_name |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| safe_db |
| test_db |
| work_db |
+--------------------+
6 rows in set (0.00 sec)
# 【root】显示所有数据库（只要授权过的数据库都会显示出来）
MariaDB [(none)]> select distinct(db) from mysql.db;
+---------+
| db |
+---------+
| safe_db |
| test_db |
| work_db |
+---------+
3 rows in set (0.00 sec)
# 获取当前数据库
MariaDB [safe_db]> select database();
+------------+
| database() |
+------------+
| safe_db |
+------------+
1 row in set (0.00 sec)
# 2.查询safe_db里的表名和视图
MariaDB [safe_db]> select table_schema,table_name,table_type,engine
from information_schema.tables where table_schema = 'safe_db';
+--------------+---------------+------------+--------+
| table_schema | table_name | table_type | engine |
+--------------+---------------+------------+--------+
| safe_db | file_records | BASE TABLE | InnoDB |
| safe_db | users | BASE TABLE | InnoDB |
| safe_db | view_userinfo | VIEW | NULL |
+--------------+---------------+------------+--------+
3 rows in set (0.00 sec)
# 3.查询指定表含哪些列
MariaDB [(none)]> select table_schema,table_name,column_name from information_schema.columns
where table_schema= 'safe_db' and table_name = 'users';
+--------------+------------+-------------+
| table_schema | table_name | column_name |
+--------------+------------+-------------+
| safe_db | users | id |
| safe_db | users | username |
| safe_db | users | password |
| safe_db | users | email |
| safe_db | users | tel |
| safe_db | users | usercode |
| safe_db | users | createtime |
| safe_db | users | updatetime |
| safe_db | users | datastatus |
+--------------+------------+-------------+
9 rows in set (0.00 sec)
# 查询除内置数据库外其他数据库和表
MariaDB [(none)]> select table_schema,table_name,column_name from information_schema.columns
where table_schema != 'mysql' and table_schema != 'information_schema' order by table_schema,table_name;
+--------------+---------------+-------------+
| table_schema | table_name | column_name |
+--------------+---------------+-------------+
| safe_db | file_records | id |
| safe_db | file_records | datastatus |
| safe_db | file_records | createtime |
| safe_db | file_records | url |
| safe_db | file_records | ip |
| safe_db | file_records | user_id |
| safe_db | file_records | meta_type |
| safe_db | file_records | md5 |
| safe_db | file_records | file_name |
| safe_db | users | datastatus |
| safe_db | users | updatetime |
| safe_db | users | createtime |
| safe_db | users | usercode |
| safe_db | users | tel |
| safe_db | users | email |
| safe_db | users | password |
| safe_db | users | username |
| safe_db | users | id |
| safe_db | view_userinfo | datastatus |
| safe_db | view_userinfo | tel |
| safe_db | view_userinfo | email |
| safe_db | view_userinfo | password |
| safe_db | view_userinfo | username |
| safe_db | view_userinfo | id |
| work_db | users | id |
| work_db | users | user_name |
| work_db | users | pass |
+--------------+---------------+-------------+
27 rows in set (0.00 sec)
# 寻找自己感兴趣的列
MariaDB [(none)]> select table_schema,table_name,column_name from information_schema.columns
where column_name like 'pass%' or column_name like 'user%';
+--------------------+-----------------+-------------+
| table_schema | table_name | column_name |
+--------------------+-----------------+-------------+
| information_schema | PROCESSLIST | USER |
| information_schema | USER_STATISTICS | USER |
| safe_db | file_records | user_id |
| safe_db | users | username |
| safe_db | users | password |
| safe_db | users | usercode |
| safe_db | view_userinfo | username |
| safe_db | view_userinfo | password |
| work_db | users | user_name |
| work_db | users | pass |
+--------------------+-----------------+-------------+
10 rows in set (0.01 sec)
# 获取数据库安装目录
MariaDB [(none)]> select @@basedir;
+-----------+
| @@basedir |
+-----------+
| /usr |
+-----------+
1 row in set (0.00 sec)
# 获取数据目录
MariaDB [(none)]> select @@datadir;
+-----------------+
| @@datadir |
+-----------------+
| /var/lib/mysql/ |
+-----------------+
1 row in set (0.00 sec)
3.获取用户信息
# 查看当前用户
MariaDB [(none)]> select user();
+-----------------+
| user() |
+-----------------+
| bryan@localhost |
+-----------------+
1 row in set (0.00 sec)
MariaDB [(none)]> select system_user();
+-----------------+
| system_user() |
+-----------------+
| bryan@localhost |
+-----------------+
1 row in set (0.00 sec)
MariaDB [(none)]> select current_user;
+--------------+
| current_user |
+--------------+
| bryan@% |
+--------------+
1 row in set (0.00 sec)
# MariaDB5.x ~ 【root】显示所有用户（含密码）
MariaDB [(none)]> select user,host,password from mysql.user;
+-------+-----------+-------------------------------------------+
| user | host | password |
+-------+-----------+-------------------------------------------+
| root | localhost | *5E6EF6ECECBC479438947268E744A8097EB19B62 |
| root | % | |
| root | 127.0.0.1 | *5E6EF6ECECBC479438947268E744A8097EB19B62 |
| root | ::1 | *5E6EF6ECECBC479438947268E744A8097EB19B62 |
| bryan | % | *F79F429101E0EB00B8132FC6874AEC01315F2088 |
| dnt | % | *1132FE0C4288F794EBF0B330344ECAFDCDD01EE9 |
+-------+-----------+-------------------------------------------+
# MySQL5.x ~ 【root】显示所有用户（含密码）
mysql> select user,host,authentication_string from mysql.user;
+------------------+-----------+-------------------------------------------+
| user | host | authentication_string |
+------------------+-----------+-------------------------------------------+
| root | localhost | |
| mysql.session | localhost | *THISISNOTAVALIDPASSWORDTHATCANBEUSEDHERE |
| mysql.sys | localhost | *THISISNOTAVALIDPASSWORDTHATCANBEUSEDHERE |
| debian-sys-maint | localhost | *8D894A8D6A636A0B04DAABD0905B58349E106D6E |
| bryan | % | *F79F429101E0EB00B8132FC6874AEC01315F2088 |
+------------------+-----------+-------------------------------------------+
5 rows in set (0.02 sec)
# PS：MySQL的sha1是变种加密
MariaDB [safe_db]> select password('xxxx');
+-------------------------------------------+
| password('xxxx') |
+-------------------------------------------+
| *F79F429101E0EB00B8132FC6874AEC01315F2088 |
+-------------------------------------------+
1 row in set (0.00 sec)
# 查看指定数据库授予用户的权限
MariaDB [(none)]> select grantee, table_schema, privilege_type from information_schema.schema_privileges where table_schema = 'safe_db';
+-------------+--------------+-------------------------+
| grantee | table_schema | privilege_type |
+-------------+--------------+-------------------------+
| 'bryan'@'%' | safe_db | SELECT |
| 'bryan'@'%' | safe_db | INSERT |
| 'bryan'@'%' | safe_db | UPDATE |
| 'bryan'@'%' | safe_db | DELETE |
| 'bryan'@'%' | safe_db | CREATE |
| 'bryan'@'%' | safe_db | DROP |
| 'bryan'@'%' | safe_db | REFERENCES |
| 'bryan'@'%' | safe_db | INDEX |
| 'bryan'@'%' | safe_db | ALTER |
| 'bryan'@'%' | safe_db | CREATE TEMPORARY TABLES |
| 'bryan'@'%' | safe_db | LOCK TABLES |
| 'bryan'@'%' | safe_db | EXECUTE |
| 'bryan'@'%' | safe_db | CREATE VIEW |
| 'bryan'@'%' | safe_db | SHOW VIEW |
| 'bryan'@'%' | safe_db | CREATE ROUTINE |
| 'bryan'@'%' | safe_db | ALTER ROUTINE |
| 'bryan'@'%' | safe_db | EVENT |
| 'bryan'@'%' | safe_db | TRIGGER |
+-------------+--------------+-------------------------+
18 rows in set (0.00 sec)
# 查询用户权限列表
MariaDB [(none)]> select grantee, privilege_type, is_grantable from information_schema.user_privileges;
+-------------+----------------+--------------+
| grantee | privilege_type | is_grantable |
+-------------+----------------+--------------+
| 'bryan'@'%' | USAGE | NO |
+-------------+----------------+--------------+
1 row in set (0.00 sec)
MariaDB [safe_db]> show grants for bryan;
+-----------------------------------------------------+
| Grants for bryan@% |
+-----------------------------------------------------+
| GRANT USAGE ON *.* TO 'bryan'@'%' IDENTIFIED BY PASSWORD '*F79F429101E0EB00B8132FC6874AEC01315F2088' |
| GRANT ALL PRIVILEGES ON `safe_db`.* TO 'bryan'@'%' |
| GRANT ALL PRIVILEGES ON `work_db`.* TO 'bryan'@'%' |
+-----------------------------------------------------+
3 rows in set (0.00 sec)
# 【root】用户查看全部用户权限列表
MariaDB [safe_db]> select grantee, privilege_type, is_grantable from information_schema.user_privileges;
+--------------------+-------------------------+--------------+
| grantee | privilege_type | is_grantable |
+--------------------+-------------------------+--------------+
| 'root'@'localhost' | SELECT | YES |
| 'root'@'localhost' | INSERT | YES |
| 'root'@'localhost' | UPDATE | YES |
| 'root'@'localhost' | DELETE | YES |
| 'root'@'localhost' | CREATE | YES |
| 'root'@'localhost' | DROP | YES |
| 'root'@'localhost' | RELOAD | YES |
| 'root'@'localhost' | SHUTDOWN | YES |
| 'root'@'localhost' | PROCESS | YES |
| 'root'@'localhost' | FILE | YES |
| 'root'@'localhost' | REFERENCES | YES |
| 'root'@'localhost' | INDEX | YES |
| 'root'@'localhost' | ALTER | YES |
| 'root'@'localhost' | SHOW DATABASES | YES |
| 'root'@'localhost' | SUPER | YES |
| 'root'@'localhost' | CREATE TEMPORARY TABLES | YES |
| 'root'@'localhost' | LOCK TABLES | YES |
| 'root'@'localhost' | EXECUTE | YES |
| 'root'@'localhost' | REPLICATION SLAVE | YES |
| 'root'@'localhost' | REPLICATION CLIENT | YES |
| 'root'@'localhost' | CREATE VIEW | YES |
| 'root'@'localhost' | SHOW VIEW | YES |
| 'root'@'localhost' | CREATE ROUTINE | YES |
| 'root'@'localhost' | ALTER ROUTINE | YES |
| 'root'@'localhost' | CREATE USER | YES |
| 'root'@'localhost' | EVENT | YES |
| 'root'@'localhost' | TRIGGER | YES |
| 'root'@'localhost' | CREATE TABLESPACE | YES |
| 'root'@'127.0.0.1' | SELECT | YES |
| 'root'@'127.0.0.1' | INSERT | YES |
| 'root'@'127.0.0.1' | UPDATE | YES |
| 'root'@'127.0.0.1' | DELETE | YES |
| 'root'@'127.0.0.1' | CREATE | YES |
| 'root'@'127.0.0.1' | DROP | YES |
| 'root'@'127.0.0.1' | RELOAD | YES |
| 'root'@'127.0.0.1' | SHUTDOWN | YES |
| 'root'@'127.0.0.1' | PROCESS | YES |
| 'root'@'127.0.0.1' | FILE | YES |
| 'root'@'127.0.0.1' | REFERENCES | YES |
| 'root'@'127.0.0.1' | INDEX | YES |
| 'root'@'127.0.0.1' | ALTER | YES |
| 'root'@'127.0.0.1' | SHOW DATABASES | YES |
| 'root'@'127.0.0.1' | SUPER | YES |
| 'root'@'127.0.0.1' | CREATE TEMPORARY TABLES | YES |
| 'root'@'127.0.0.1' | LOCK TABLES | YES |
| 'root'@'127.0.0.1' | EXECUTE | YES |
| 'root'@'127.0.0.1' | REPLICATION SLAVE | YES |
| 'root'@'127.0.0.1' | REPLICATION CLIENT | YES |
| 'root'@'127.0.0.1' | CREATE VIEW | YES |
| 'root'@'127.0.0.1' | SHOW VIEW | YES |
| 'root'@'127.0.0.1' | CREATE ROUTINE | YES |
| 'root'@'127.0.0.1' | ALTER ROUTINE | YES |
| 'root'@'127.0.0.1' | CREATE USER | YES |
| 'root'@'127.0.0.1' | EVENT | YES |
| 'root'@'127.0.0.1' | TRIGGER | YES |
| 'root'@'127.0.0.1' | CREATE TABLESPACE | YES |
| 'root'@'::1' | SELECT | YES |
| 'root'@'::1' | INSERT | YES |
| 'root'@'::1' | UPDATE | YES |
| 'root'@'::1' | DELETE | YES |
| 'root'@'::1' | CREATE | YES |
| 'root'@'::1' | DROP | YES |
| 'root'@'::1' | RELOAD | YES |
| 'root'@'::1' | SHUTDOWN | YES |
| 'root'@'::1' | PROCESS | YES |
| 'root'@'::1' | FILE | YES |
| 'root'@'::1' | REFERENCES | YES |
| 'root'@'::1' | INDEX | YES |
| 'root'@'::1' | ALTER | YES |
| 'root'@'::1' | SHOW DATABASES | YES |
| 'root'@'::1' | SUPER | YES |
| 'root'@'::1' | CREATE TEMPORARY TABLES | YES |
| 'root'@'::1' | LOCK TABLES | YES |
| 'root'@'::1' | EXECUTE | YES |
| 'root'@'::1' | REPLICATION SLAVE | YES |
| 'root'@'::1' | REPLICATION CLIENT | YES |
| 'root'@'::1' | CREATE VIEW | YES |
| 'root'@'::1' | SHOW VIEW | YES |
| 'root'@'::1' | CREATE ROUTINE | YES |
| 'root'@'::1' | ALTER ROUTINE | YES |
| 'root'@'::1' | CREATE USER | YES |
| 'root'@'::1' | EVENT | YES |
| 'root'@'::1' | TRIGGER | YES |
| 'root'@'::1' | CREATE TABLESPACE | YES |
| 'root'@'%' | USAGE | NO |
| 'bryan'@'%' | USAGE | NO |
| 'dnt'@'%' | USAGE | NO |
+--------------------+-------------------------+--------------+
87 rows in set (0.00 sec)
# 【root】查询更详细的用户权限
MariaDB [safe_db]> select host, user, Select_priv, Insert_priv, Update_priv, Delete_priv, Create_priv, Drop_priv, Reload_priv, Shutdown_priv, Process_priv, File_priv, Grant_priv, References_priv, Index_priv, Alter_priv, Show_db_priv, Super_priv, Create_tmp_table_priv, Lock_tables_priv, Execute_priv, Repl_slave_priv, Repl_client_priv from mysql.user\G;
*************************** 1. row ***************************
host: %
user: root
Select_priv: N
Insert_priv: N
Update_priv: N
Delete_priv: N
Create_priv: N
Drop_priv: N
Reload_priv: N
Shutdown_priv: N
Process_priv: N
File_priv: N
Grant_priv: N
References_priv: N
Index_priv: N
Alter_priv: N
Show_db_priv: N
Super_priv: N
Create_tmp_table_priv: N
Lock_tables_priv: N
Execute_priv: N
Repl_slave_priv: N
Repl_client_priv: N
。。。。。。
*************************** 5. row ***************************
host: %
user: bryan
Select_priv: N
Insert_priv: N
Update_priv: N
Delete_priv: N
Create_priv: N
Drop_priv: N
Reload_priv: N
Shutdown_priv: N
Process_priv: N
File_priv: N
Grant_priv: N
References_priv: N
Index_priv: N
Alter_priv: N
Show_db_priv: N
Super_priv: N
Create_tmp_table_priv: N
Lock_tables_priv: N
Execute_priv: N
Repl_slave_priv: N
Repl_client_priv: N
*************************** 6. row ***************************
host: %
user: dnt
Select_priv: N
Insert_priv: N
Update_priv: N
Delete_priv: N
Create_priv: N
Drop_priv: N
Reload_priv: N
Shutdown_priv: N
Process_priv: N
File_priv: N
Grant_priv: N
References_priv: N
Index_priv: N
Alter_priv: N
Show_db_priv: N
Super_priv: N
Create_tmp_table_priv: N
Lock_tables_priv: N
Execute_priv: N
Repl_slave_priv: N
Repl_client_priv: N
6 rows in set (0.00 sec)
# PS：获取列的权限列表（用的不多）
select table_schema, table_name, column_name, privilege_type from information_schema.column_privileges;
# PS：查询数据库支持哪些权限
mysql> show privileges;
+-------------------------+---------------------------------------+-------------------------------------------------------+
| Privilege | Context | Comment |
+-------------------------+---------------------------------------+-------------------------------------------------------+
| Alter | Tables | To alter the table |
| Alter routine | Functions,Procedures | To alter or drop stored functions/procedures |
| Create | Databases,Tables,Indexes | To create new databases and tables |
| Create routine | Databases | To use CREATE FUNCTION/PROCEDURE |
| Create temporary tables | Databases | To use CREATE TEMPORARY TABLE |
| Create view | Tables | To create new views |
| Create user | Server Admin | To create new users |
| Delete | Tables | To delete existing rows |
| Drop | Databases,Tables | To drop databases, tables, and views |
| Event | Server Admin | To create, alter, drop and execute events |
| Execute | Functions,Procedures | To execute stored routines |
| File | File access on server | To read and write files on the server |
| Grant option | Databases,Tables,Functions,Procedures | To give to other users those privileges you possess |
| Index | Tables | To create or drop indexes |
| Insert | Tables | To insert data into tables |
| Lock tables | Databases | To use LOCK TABLES (together with SELECT privilege) |
| Process | Server Admin | To view the plain text of currently executing queries |
| Proxy | Server Admin | To make proxy user possible |
| References | Databases,Tables | To have references on tables |
| Reload | Server Admin | To reload or refresh tables, logs and privileges |
| Replication client | Server Admin | To ask where the slave or master servers are |
| Replication slave | Server Admin | To read binary log events from the master |
| Select | Tables | To retrieve rows from table |
| Show databases | Server Admin | To see all databases with SHOW DATABASES |
| Show view | Tables | To see views with SHOW CREATE VIEW |
| Shutdown | Server Admin | To shut down the server |
| Super | Server Admin | To use KILL thread, SET GLOBAL, CHANGE MASTER, etc. |
| Trigger | Tables | To use triggers |
| Create tablespace | Server Admin | To create/alter/drop tablespaces |
| Update | Tables | To update existing rows |
| Usage | Server Admin | No privileges - allow connect only |
+-------------------------+---------------------------------------+-------------------------------------------------------+
31 rows in set (0.00 sec)
other
# 获取会话id
MariaDB [(none)]> select connection_id();
+-----------------+
| connection_id() |
+-----------------+
| 6 |
+-----------------+
1 row in set (0.00 sec)
# 获取最后一个插入的id
MariaDB [(none)]> select last_insert_id();
+------------------+
| last_insert_id() |
+------------------+
| 0 |
+------------------+
1 row in set (0.00 sec)
# 返回前一个SQL进行`update、delete、insert`操作所影响的行数
MariaDB [(none)]> select row_count();
+-------------+
| row_count() |
+-------------+
| -1 |
+-------------+
1 row in set (0.00 sec)
参考链接
国外常用的SQLi备忘录：
- MySQL：http://pentestmonkey.net/category/cheat-sheet
- MSSQL：http://pentestmonkey.net/cheat-sheet/sql-injection/mssql-sql-injection-cheat-sheet
MySQL系统表相关知识：
- https://blog.csdn.net/xlxxcc/article/details/51754524
- https://jingyan.baidu.com/article/636f38bb8e6b3ad6b84610df.html
HashCat使用：https://www.freebuf.com/sectool/164507.html
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