NCSS 07.1.21 – Array Overflow with Write2

• Exploit Database
• 120 阅读

• 作者： Luigi Auriemma
  日期： 2011-09-29
• 类别：

  • dos
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/17903/
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  #######################################################################   Luigi Auriemma   Application:NCSS (aka NCSS 2007) http://www.ncss.com/ncss.html Versions: <= 07.1.21 Platforms:Windows Bug:array overflow with write2 Exploitation: file Date: 28 Sep 2011 Author: Luigi Auriemma e-mail: aluigi@autistici.org web:aluigi.org     #######################################################################     1) Introduction 2) Bug 3) The Code 4) Fix     #######################################################################   =============== 1) Introduction ===============     From vendor&apos;s homepage: "NCSS has specialized in providing statistical analysis software to researchers, businesses, and academic institutions."     #######################################################################   ====== 2) Bug ======     Through the S0 files it&apos;s possible to exploit various array overflow vulnerabilities for writing the word 0xfffd in an arbitrary zone of the memory. The following is one of these bugs, from VCF132.dll:   1D044E91|. 0FB750 06 ||MOVZX EDX,WORD PTR DS:[EAX+6]; EDX controlled 1D044E95|. 8B0491||MOV EAX,DWORD PTR DS:[ECX+EDX*4] 1D044E98|. 8BCB||MOV ECX,EBX 1D044E9A|. 66:C740 04 FDFF ||MOV WORD PTR DS:[EAX+4],0FFFD; write2   For the other array overflows it&apos;s enough to search the 0xfffd constant and all the operations like the above one.     #######################################################################   =========== 3) The Code ===========     http://aluigi.org/poc/ncss_1.s0 https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/17903.s0   the 16bit value for EDX is located at offset 0x8bd.     #######################################################################   ====== 4) Fix ======     No fix.     #######################################################################