6 Million User Data of China Software Developer Network (CSDN) Leaked

Updated:Thu, Dec 22, 2011 23:37 PM   By Bernd Chang

CSDN,Hacker

6 million user data of China's largest software developers community CSDN was leaked, downloaded and publicized. Chinese netizens are in a panic and seriously concerned about their privacy and information security of China.

Account information for more than 6 million registered users of online community Chinese Software Developer Network (CSDN,net) has been leaked online.

 

Dec. 22,2011,Beijing - The "Chinese Software Developer Network" (CSDN), operated by Bailian Midami Digital Technology Co., Ltd., is one of the biggest networks of software developers in China. A text file with 6 Million CSDN user info including user name, password, emails, all in clear text leaked on internet. The download link of the File is available on various social Networks. Now Chinese programmers are busy changing their password.

The CSDN community website is where Chinese software programmers seek advices. The poster describes the problem, posts it in the forum with a price in CSDN points, and then waits for replies. In some hot boards, poster usually get response in a few hours, if not minutes. Most replies are short but enough to point out the mistake and give possible solutions. Some posts include code and may grow to several pages. The majority of posts are written in Simplified Chinese, however Traditional Chinese and English posts are not uncommon. The culture of sharing knowledges and help each other is dominant in CSDN.

Topics are mainly IT related and focused on programming, but political and life topics are also active. It was closed for two weeks in June 2004, believed for political reasons because many political words, such as the names of political leaders and organizations are banned in posts since then. However, political discussions are still active using intentional misspelling.

CSDN(website: http://www.csdn.net) has confirmed the news and issued a statement on 21 Wednesday on the '600 million users account password disclosure' , claimed that the website of CSDN has been attacked by hacker and admitted that some user accounts at risk, will be temporarily Close the user login, and called for 'registered before April 2009, the account, and after September 2010 have not changed the password,' the user to immediately change the password, although the exact cause for the leak has yet to be determined.

CSDN online statement says that CSDN website had used cleartext password until April 2009 when the programmer modified the way the password saved and changed to the encryption password.

However, some of the old plaintext password is not cleared by the end of August 2010. And in January 2011, CSDN upgraded the account management function, using a strong encryption algorithm.

The statement concludes that password before September of 2010 was at risk and urges registered users to change their password as soon as possible.

The statement also adds that CSDN has called the police and the leak reason is under police investigation.

After the incident, programmers having registered with CSDN are in a panic and some are very angry. Some can not understand why the adminstrators of such a large community for programmers use plaintext as password, "It is completely unprofessional and it looks like a group of professionals are adminstered by several idiots." One netizen comments.

Online sources say that the leaks were deliberate and users of Chinese SNS sites Renren and Kaixin001, the Tianya online community and matchmaking sites Jiayuan.com and Baihe.com will be the next targets.

Something interesting was found after data mining on CSDN leaked user data by some netizens who downloaded the user data.

About one third of the 6 minion Chinese programmers use email service of qq.com, one third of Netease (163.com and 126.com). Gmail.com, hotmail.com and yahoo.com.cn each has about 5 percent market.

The password 123456789 is most popular among the Chinese programmers, of the 6 million users, as many as 235,000 use it as their password. Following is the top 10 most popular passwords Chinese use.

Rank • Users Password

1. • 235038 123456789

2. • 212761 12345678

3. • 76348 11111111

4. • 45902 dearbook

5. • 34954 00000000

6. • 20010 123123123

7. • 17794 1234567890

8. • 15033 88888888

9. • 6995 111111111

10. • 5966 147258369

11. • 5555 987654321

12. • 5459 aaaaaaaa

13. • 5145 1111111111

14. • 5026 66666666

15. • 4435 a123456789

16. • 4096 11223344

17. • 3672 1qaz2wsx

18. • 3649 xiazhili

19. • 3610 789456123

20. • 3499 password

21. • 3282 87654321

22. • 3277 qqqqqqqq

23. • 3175 000000000

24. • 3143 qwertyuiop

25. • 3094 qq123456

26. • 3079 iloveyou

27. • 3063 31415926

28. • 2985 12344321

29. • 2886 0000000000

30. • 2826 asdfghjkl

31. • 2797 1q2w3e4r

32. • 2581 123456abc

33. • 2578 0123456789

34. • 2573 123654789

35. • 2540 12121212

36. • 2515 qazwsxedc

37. • 2397 abcd1234

38. • 2380 12341234

39. • 2348 110110110

40. • 2298 asdasdasd

41. • 2243 22222222

42. • 2182 123456

43. • 2166 123321123

44. • 2160 abc123456

45. • 2138 a12345678

46. • 2113 123456123

47. • 2108 a1234567

48. • 2100 1234qwer

49. • 1989 qwertyui

50. • 1987 123456789a

51. • 1971 aa123456

52. • 1918 asdfasdf

53. • 1891 99999999

54. • 1859 999999999

55. • 1859 123456aa

56. • 1854 123456123456

57. • 1699 520520520

58. • 1656 963852741

59. • 1652 741852963

60. • 1652 55555555

61. • 1589 33333333

62. • 1480 qwer1234

63. • 1384 asd123456

64. • 1339 77777777

65. • 1316 qweasdzxc

66. • 1285 code8925

67. • 1273 11112222

68. • 1268 ms0083jxj

69. • 1245 zzzzzzzz

70. • 1214 111222333

71. • 1206 qweqweqwe

72. • 1200 3.1415926

73. • 1183 123456qq

74. • 1148 147852369

75. • 1136 521521521

76. • 1122 asdf1234

77. • 1111 123698745

78. • 1109 1123581321

79. • 1058 asdfghjk

80. • 1054 q1w2e3r4

81. • 1038 12345678a

82. • 1006 !@

83. • 1004 woaini1314

84. • 991 1234abcd

85. • 988 123qweasd

86. • 977 1qazxsw2

87. • 968 woaiwojia

88. • 920 321321321

89. • 910 05962514787

90. • 894 123456987

91. • 892 kingcom5

92. • 882 zxcvbnm123

93. • 882 5845201314

94. • 863

95. • 853 0987654321

96. • 847 wwwwwwww

97. • 835 11111111111111111111

98. • 805 12345600

99. • 783 11235813

100. • 777 1q2w3e4r5t

101. • 772 10101010

102. • 770 123456asd

103. • 765 lilylily

104. • 744 12345612

105. • 741 5201314520

106. • 740 1234554321

107. • 732 12301230

108. • 729 woshishui

109. • 727 123456654321

110. • 726 xiaoxiao

 

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