| Server IP : 49.231.201.246 / Your IP : 216.73.216.248 Web Server : Apache/2.4.18 (Ubuntu) System : Linux 246 4.4.0-210-generic #242-Ubuntu SMP Fri Apr 16 09:57:56 UTC 2021 x86_64 User : root ( 0) PHP Version : 7.0.33-0ubuntu0.16.04.16 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority, MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : ON | Sudo : ON | Pkexec : ON Directory : /etc/sysctl.d/ |
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# The PTRACE system is used for debugging. With it, a single user process # can attach to any other dumpable process owned by the same user. In the # case of malicious software, it is possible to use PTRACE to access # credentials that exist in memory (re-using existing SSH connections, # extracting GPG agent information, etc). # # A PTRACE scope of "0" is the more permissive mode. A scope of "1" limits # PTRACE only to direct child processes (e.g. "gdb name-of-program" and # "strace -f name-of-program" work, but gdb's "attach" and "strace -fp $PID" # do not). The PTRACE scope is ignored when a user has CAP_SYS_PTRACE, so # "sudo strace -fp $PID" will work as before. For more details see: # https://wiki.ubuntu.com/SecurityTeam/Roadmap/KernelHardening#ptrace # # For applications launching crash handlers that need PTRACE, exceptions can # be registered by the debugee by declaring in the segfault handler # specifically which process will be using PTRACE on the debugee: # prctl(PR_SET_PTRACER, debugger_pid, 0, 0, 0); # # In general, PTRACE is not needed for the average running Ubuntu system. # To that end, the default is to set the PTRACE scope to "1". This value # may not be appropriate for developers or servers with only admin accounts. kernel.yama.ptrace_scope = 1