[20171213]john破解oracle口令.txt
--//跟别人讨论的oracle破解问题,我曾经提过不要使用6位字符以下的密码,其实不管那种系统低于6位口令非常容易破解.
--//而且oracle缺省还保证旧口令模式在sys.user$文件中,破解这个更容易.我仅仅写一些例子:
1.环境:
SYS@book> @ &r/ver1
PORT_STRING VERSION BANNER
------------------------------ -------------- --------------------------------------------------------------------------------
x86_64/Linux 2.4.xx 11.2.0.4.0 Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
SYS@book> column spare4 format a62
SYS@book> select NAME,SPARE4,PASSWORD from sys.user$ where name='SCOTT';
NAME SPARE4 PASSWORD
-------------------- -------------------------------------------------------------- ------------------------------
SCOTT S:70863744165E30E16FA46A05043A7E858A7D98BC359FD004C4A628C3F80A F894844C34402B67
2.安装john:
--//我选择rpm包,很容易找到.步骤略.我安装的版本:
$ john
John the Ripper password cracker, version 1.7.6-jumbo-12
...
3.破解:
--//建立文件a.txt
$ cat a.txt
SCOTT:F894844C34402B67
$ john --format=oracle a.txt
Loaded 1 password hash (Oracle [oracle])
TIGER (SCOTT)
guesses: 1 time: 0:00:00:00 100.00% (2) (ETA: Wed Dec 13 10:54:35 2017) c/s: 56600 trying: TIGER
4.破解oracle 11g密码:
--//建立文件b.txt
$ cat b.txt
S:70863744165E30E16FA46A05043A7E858A7D98BC359FD004C4A628C3F80A
$ john --format=oracle11 b.txt
Loaded 1 password hash (Oracle 11g [oracle11])
tiger (S)
guesses: 1 time: 0:00:00:00 100.00% (2) (ETA: Wed Dec 13 10:55:28 2017) c/s: 80100 trying: tiger
--//基于英文字典的破解1秒都不到.
--//破解的记录保证在在/home/oracle/.john/目录的john.pot文件,安全需要可以删除.
--//修改为T1IGER,再次测试:
$ john --format=oracle a.txt
Loaded 1 password hash (Oracle [oracle])
Warning: mixed-case charset, but the current hash type is case-insensitive;
some candidate passwords may be unnecessarily tried more than once.
guesses: 0 time: 0:00:00:07 (3) c/s: 694786 trying: 31044016
guesses: 0 time: 0:00:00:08 (3) c/s: 702679 trying: DDAPH7
T1IGER (SCOTT)
guesses: 1 time: 0:00:00:11 (3) c/s: 738577 trying: T1IGER
--//6位的密码11秒破解.
$ john --format=oracle11 b.txt
Loaded 1 password hash (Oracle 11g [oracle11])
guesses: 0 time: 0:00:00:02 (3) c/s: 2534K trying: bob1420
t1iger (S)
guesses: 1 time: 0:00:00:03 (3) c/s: 2581K trying: t1iger
--//我修改3次,都记录在a.txt:
$ john --format=oracle a.txt
Loaded 3 password hashes with no different salts (Oracle [oracle])
TIGER (SCOTT)
Warning: mixed-case charset, but the current hash type is case-insensitive;
some candidate passwords may be unnecessarily tried more than once.
T1IGER (SCOTT)
BOOKBOOK (SCOTT)
guesses: 3 time: 0:00:01:53 (3) c/s: 1037K trying: BOOKBOOK
$ john --format=oracle11 b.txt
Loaded 3 password hashes with 3 different salts (Oracle 11g [oracle11])
tiger (S)
t1iger (S)
bookbook (S)
guesses: 3 time: 0:00:00:33 (3) c/s: 3526K trying: bookbook
--//基于英文字典的破解非常快,3个口令2分钟.