第五章 Linux二进制分析
第四题：分析lvl4文件
$ file lvl4
lvl4: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 2.6.32, BuildID[sha1]=f8785d89a1f11e7b413c08c6176ad1ed7b95ca08, stripped
$ ltrace ./lvl4
__libc_start_main(0x4004a0, 1, 0x7ffefb1f2b28, 0x400650 <unfinished ...>
setenv("FLAG", "656cf8aecb76113a4dece1688c61d0e7"..., 1) = 0
+++ exited (status 0) +++
结果flag就是656cf8aecb76113a4dece1688c61d0e7，瞬间结束！
$ ./oracle 656cf8aecb76113a4dece1688c61d0e7
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~+
| Level 4 completed, unlocked lvl5 |
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~+
Run oracle with -h to show a hint
