• tychebe (37)in #security • 8 years ago

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• tychebe (37)in #security • 8 years ago

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• tychebe (37)in #security • 8 years ago

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• tychebe (37)in #security • 8 years ago

  12421412542sergsrehtserg

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  • - Author $0.14
  • - Curators $0.05

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• tychebe (37)in #security • 8 years ago

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• tychebe (37)in #security • 8 years ago

  setresuid() function

  □ SET Real uid, Effective uid, Saved set-User-ID □ Function that modifies a process's "real UID", "effective UID" and "saved set-user-ID" □ Unprivileged process configures…

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• tychebe (37)in #security • 8 years ago

  errno variable

  □ Global variable that stores the cause of a error when a function is executed □ Return value can only check whether an error occurred □ If there is no error, 0 is stored.…

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• tychebe (37)in #security • 8 years ago

  Nebula level02 solution

  □ Aim : Execute getflag command with flag02 account and check the message  "You have successfully executed getflag on a target account" □ Vulnerability : Refer the…

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• tychebe (37)in #security • 8 years ago

  asprintf function

  □ allocated string printf □ It is function of GNU extensions(No C or POSIX) □ int asprintf(char **strp, const char *fmt, ...) □ It prints the contents of fmt to the strp. As…

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• tychebe (37)in #security • 8 years ago

  Nebula Level02 hint

  [Hint#1] Sticky bit is configured in the flag02 file. [Hint#2] If you execute the flag02 file, You can see the upper result that includes value of USER…

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• tychebe (37)in #security • 8 years ago

  Difference between su and su -

  □ "su" constitutes authority and minimum environment variables, such as the root account □ "su -" constitutes almost same environment as login shell of the root account □…

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• tychebe (37)in #security • 8 years ago

  difference between sudo and su

  □ su(substitute user) ○ This linux command allows a user to log in as another user Without log out ○ "su" without parameter is same as "su root"(=Login as root) ○ Account…

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• tychebe (37)in #security • 8 years ago

  Method of changing group password policy(group ↔ gshadow)

  □ If the group password policy is changed to gshadow, each group's password of group file is changed to x □ grpconv : It is linux command to change password policy(group →…

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• tychebe (37)in #security • 8 years ago

  Method of changing password policy(passwd ↔ shadow)

  □ When linux is installed, like the picture above, there is a case that the password is stored in the passwd file □ If the password policy is changed to shadow, each account's…

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• tychebe (37)in #security • 8 years ago

  Cyber operation#1 (To construct a sniffer system)

  □ General situation ○ You are a information security team leader of a corporation ○ Following orders of CISO, you establish plans, organize TFs and build up systems ○ The…

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• tychebe (37)in #security • 8 years ago

  Method of killing all processes of the current shell

  □ ps | awk '{print $1}' | xargs kill -9   ○ ps : It prints the running processes   ○ | awk '{print $1}' : It prints the first column of the result of ps(=pid)   ○ | xargs kill…

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• tychebe (37)in #security • 8 years ago

  Control panel(.msc) run command list

  □ gpedit.msc : To execute group policy □ printmanagement.msc : To execute print management □ rsop.msc : To execute result set of policy □ secpol.msc : To execute local…

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• tychebe (37)in #security • 8 years ago

  Control panel run command list

  □ control : To execute Control panel(=C:\Windows\System32\control.exe) □ appwiz.cpl :  To execute programs and features □ control admintools : To execute administrative tools…

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• tychebe (37)in #security • 8 years ago

  Windows run command list

  calc : To execute calculation charmap : To execute Character map cleanmgr : To execute disk cleanup manager cmd : To execute command prompt control : To execute control…

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• tychebe (37)in #security • 8 years ago

  Windows Explorer shortcuts list

  □ Alt + ← : To go back □ Alt + → : To go forward □ Alt + ↑ : To go to the parent directory □ Alt + Enter : To check selected file(or directory)'s properties □ Alt + D : To…

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