2024年3月10日发(作者:)
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深信服科技EasyConnectVpn 0day漏洞分析与利用
环境: xp sp3
浏览器: xp sp3 自带的ie6
(安装install程序,程序目录C:Program FilesSangforSSL)
一、先用windbg加载poc(c:)
然后g运行程序,出现异常,异常情况如下:
0:000> g
(8): Access violation - code c0000005 (first chance)
First chance exceptions are reported before any exception handling.
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This exception may be expected and handled.
eax=0000004a ebx=022cde82 ecx=0013e140 edx=00140000 esi=0013df00
edi=0013e140
eip=77c12332 esp=0013dea0 ebp=0013deac iopl=0 nv up ei pl nz na po nc
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010202
msvcrt!wscanf+0x6c:
77c12332 8802 mov byte ptr [edx],al ds:0023:00140000=41
*** ERROR: Symbol file could not be found. Defaulted to export symbols for
C:Program -
然后kv 查看异常时的堆栈情况,猜测出现异常的模块。
异常处的代码:
0:000> u msvcrt!wscanf+0x6c
msvcrt!wscanf+0x6c:
77c12332 8802 mov byte ptr [edx],al //此处发生异常
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